Torque angle wrench

Torque angle wrench DEFAULT

Current Issue

Anyone who has serviced engines (as well as certain driveline and chassis components) that date from roughly the early 1990s to the present is aware that many OE threaded fastener tightening requirements call for a combination of torque-plus-angle specifications as opposed to a torque-only spec. Common applications for this procedure include but are not limited to cylinder head fasteners, main cap fasteners and connecting rod bolts.

WHY TORQUE-PLUS-ANGLE?

Regardless of how silly the extra step of angle tightening may seem to some people, there is a legitimate reason for this approach…it’s better.

Remember that clamping load relies on bolt stretch (taking advantage of the bolt’s elastic properties). Since fastener engineers already know how much stretch, and therefore clamping load, will occur based on how far the bolt head rotates, they use the angle of bolt head movement to determine exactly how much load is being exerted.

A torque spec alone cannot be used to exactly determine bolt stretch because of the friction variables that come into play during tightening. A certain amount of torque loss is caused by the friction of the bolt head underside to the parent material contact surface (for example, where the bolt head contacts a cylinder head), and by the friction of the thread engagement. The type and amount of oil/lubricant on the threads provides yet another variable in terms of friction.

Depending on how smooth and burr-free the bolt head contact area is, and on how smooth and uninterrupted the threads are on both the bolt and the female threaded hole, a torque reading alone really can't provide accurate and consistent clamping load information.  If enough friction is created by these variables, a reading of, say, 60 ft. lbs. on a torque wrench may in reality only provide the equivalent of  (for example) 47 ft. lbs. that actually works to stretch the bolt. And if the bolt was designed to stretch to its just-short-of-yield point at a true 60 ft. lbs., this inadequate bolt stretch will mean insufficient clamping load. (which, in the case of cylinder head bolts, for example) can lead to a gasket leak or gasket failure down the road.

Torque-plus-angle simply provides a more accurate method of achieving the needed clamping load.

If published tightening specs only call for torque, then tighten accordingly. But for later model (domestic and import) applications that specify a torque-plus-angle method, you MUST follow those procedures in order to achieve design clamping loads.

Previously in order to achieve final angle-tightening, common methods included placing a reference mark (paint or pen) on the bolt head, and observing the angle of rotation (a “close enough” guesstimate of a movement of 90 degrees, or 45 degrees, etc., which is “close” but certainly not repeatable or consistent, or accurate). Another method is to use an inexpensive specialty tool that consists of a plastic or metal incremented dial that is placed onto a wrench drive, between the drive square and the socket wrench (angle gauge or protractor). This works, but it’s time consuming (torque to the required spec, remove the torque wrench, grab another square drive wrench, place the dial gauge onto the drive, attach a socket wrench to the dial gauge, re-attack the fastener and tighten to the required angle). Plus, if you bump the angle gauge or protractor, you lose your reference point, which means that you need to loosen the fastener and start over.

Thanks to advancing technology and the efforts of quality tool manufacturers such as Snap-On, those days are gone, providing you pony-up and take advantage of a new precision tool system.

TECHANGLE MODEL SPECS:

MODEL           SQ. DRIVE      ft.-lb.               Nm                    in.-lb.    Overload      Length

ATECH1FR240      ¼ in.        2.0-20.0         2.7-27.1            24-240       25           15 in.

ATECH2FR100      3/8 in.      5.0-100.0      6.8-135.6          60-1200    125         17 in.

ATECH3FR250      ½ in.        12.5-250.0    16.9-338.9      150-3000    312        26 in.

NOTE:When ordering your Tech-Angle wrench, be aware that different versions are available in terms of torque formats. If the model number ends in the letter “N,” this indicates that torque readings are only available in Nm (Newton meters). If you want to have a choice between Nm, ft-lb and in-lb, the model number should feature the letter “A” at the end (for example: ATECH3FR250N reads in Nm; while ATECH3FR250A provides options of Nm, ft.-lb. and in.-lb.). I learned this the hard way. The first unit I received was Model ATECH3FR250N. When I fired it up, I quickly realized that I didn’t have the option of switching to ft.-lb., since it only offered Nm. I swapped this out for ATECH3FR250A, which offers all three formats (Nm, ft.-lb. and in.-lb.). Of course, if your shop torques all fasteners in units of Nm, the dedicated Nm version (suffix N) would be ideal.

The Snap-On TECHANGLE wrench digitally displays and monitors both fastener torque and angular rotation. The wrench functions as an adjustable torque wrench, as you’d expect, and also functions as an adjustable angle wrench, simultaneously monitoring torque to prevent fastener or wrench overload.

The preset values are programmable from 5% to 100% of full-scale torque and 5 to 360 degrees  of rotation. The scrolling digital display rolls over at both ends for convenient and quick setting.

If the wrench is used beyond 100% torque capacity, an audible tone will pulse rapidly to warn the user to stop.

To preset the wrench, select unit of measure (Nm, ft.-lb., in.-lb. or degrees). Use the UP/DOWN keys to set the torque value or angle degrees required.

In the torque display mode, the display shows the torque preset value until 5% or more of full scale torque is applied. The display then switches to TRACK mode, showing the applied torque in real-time. When applied torque is within 2% of the preset value, the buzzer will sound for ½ second and the handle will vibrate until the applied torque is released. At torque-release, the display shows the PEAK value applied (this flashes for 10 seconds). If torque is re-applied during this 10-desond period, the display will automatically switch to TRACK mode (again, to show applied torque in real-time). NOTE: If any button is pushed during this 10-second window, the PEAK value will be cleared.

In the angle display mode, the display shows the angle PRESET value. Angle measurement is held in reset until 5% of torque is applied. When applied torque is released, the accumulated torque and angle values will flash alternately for 10 seconds. The display will continue to accumulate if torque is reapplied within this 10-second period (this allows time for changing the wrench to reverse ratchet motion if needed). When the accumulated angle equals the preset angle, the buzzer will sound for one second and the handle will vibrate until torque is released. Once the angle preset has been reached, and once torque has been released, the total angle accumulation and the peak torque value will be displayed alternately for 10 seconds (or until any key is pushed). If the angle preset is reached and torque is released, angle accumulation resets to zero automatically. This provides time to move to the next fastener (this gives to 10 seconds to move to the next fastener without the need to re-program).

MY TEST

I first dropped three fresh AA batteries into the grip (unscrew the end-cap, insert all three batteries with positive end first and reinstall the cap, being careful not to cross-thread the cap. If you do cross-thread the cap, proper contact won’t be achieved and the unit won’t power-up). For the sample test, I chose a 1999 GM 5.3L cast iron block (LS type). The main caps utilize four 10mm primary bolts and two 8mm side bolts per cap. The inboard cap bolts call for an initial torque value of 15 ft-lbs, finished with 80 degrees of rotation. The outboard 10mm bolts (these feature stud tips for the oil pump pickup and windage tray) call for an initial 15 ft.-lbs. followed by 53 degrees of rotation. Once the 10mm main cap bolts are fully tightened, the 8mm side bolts are snugged to a value of 18 ft.-lbs.

 

 

During tightening of the inner and outer main cap bolts on this 5.3L block, I preset torque at 15 ft.-lbs. With the Tech Angle wrench set to the ft-lb mode and set at 15 ft-lb, I began to apply torque. The instant I hit 15 ft.-lbs., the alarm sounded, instantly followed by very noticeable grip vibration and a buzzing sound. I torqued all of the inner and outer cap bolts (in proper sequence) to this initial 15 ft-lb value. I then pressed the “U” button to switch to angle mode, and adjusted desired angle to either 53 or 80 degrees (remember: the LS calls for two different angle values, for inboard and outboard cap bolts). As I tightened each bolt, as soon as I reached the programmed angle value, the alarm sounded, instantly followed by grip vibration and buzzing. If all cap bolts called for the same angle value, I could have simply preset one angle value and finished tightening. However, because this wrench allows you to quickly re-adjust values, switching from 80 to 53 degrees (depending on which bolt location I needed to address), the task went quickly (immensely faster than if I was forced to use an angle gauge).

The audible and vibration alerts ensure that you’re instantly and clearly informed of reaching your preset value, even in the noisiest of shops. If you can’t hear the chirp or buzz (you’d have to be deaf not to hear this), you’ll definitely feel the vibration in the grip.  I found this tool not only easy to use, but quick and repeatable. And because of the projection hump on the grip, I could lay the wrench onto my workbench without fear of it rolling off. The 15-degree pivot built into the drive head comes in handy too, especially when a nearby object is slightly in the way of your tightening path.

I won’t try to toss any BS here…. admittedly, this tool is expensive (at a suggested list of about $515), but as we all know, quality precision tools are never cheap. Considering it’s precision, construction quality and it’s time saving capabilities, it’s a solid investment, especially for the technician who cares about the quality of his work (notice how often I refer to the word “precision?” It’s not an accident. This is one of the crown jewels in my engine assembly room).

NICE FEATURES

The grip features not only a rubber surface for non-slip and comfy operation, but a forward “nub” stand is placed at the front of the grip area. This prevents the tool from rolling off of a table (very cool feature that all torque wrenches should have). Also, the sealed key pad prevents dust and grit. Actually, construction of the entire tool is designed to be splash proof, protecting the tool from water and most shop chemicals (I don’t recommend using the tool underwater during submarine maintenance, but it should survive your shop environment). 

Also, the flex head pivots 15 degrees in either direction (up/down), for convenient fastener access, without screwing up torque or angle calibration. Also, once you’ve pre-set your torque and angle once torque is reached (the alarm sounds and the handle vibrates and buzzes), simply press the “U” button to switch to angle mode and continue to tighten. Once the preset angle is reached, the alarm sounds and the handle vibrates and buzzes. And, you can actually ratchet during angle tightening. According to Snap-On, this is achieved by using angle calculations based on the same gyroscope technology featured in helicopters (how cool is that?).

I love tools. I use them, and sometimes abuse them, but I still get excited when trying out a new tool (hand tool, pneumatic, electric, etc., it doesn’t matter). This new torque/angle wrench is an absolute funfest. It’s handy, it’s a quality precision tool and it works as designed. It just doesn’t get any better than that. In the future, every time I need to perform a torque-plus-angle tightening on a bunch of head bolts, I’ll be smilin’.

TO AVOID WRENCH DAMAGE

-          Never use this wrench with the power turned off.

-          Do not press the ON/RESET button while torque is being applied or when the wrench is in motion.

-          Never use this wrench to break fasteners loose (the same holds true for any torque wrench).

-          Do not use extensions (such as a pipe) to extend the length of the handle.

-          Check that the wrench capacity matches or exceeds each application before proceeding.

-          If the wrench is dropped, calibration must be re-verified.

-          Always make sure that the ratchet direction lever is fully engaged in the correct position.

-          Don’t force the head of the flex-head against the stops.

-          Always pull (never push) on the wrench handle, and adjust your stance to prevent a possible fall if something slips/fails.

OUR TEST TOOL SPECS

MFG………………Snap-on

P/N………………..ATECH3FR250A

SUGG. PRICE………$515

SQUARE DRIVE…………1/2-in.

HEAD TYPE………………Sealed flex head

GEAR TEETH………………36

GEAR ACTION…………….10 deg.

HEAD DEPTH…………….3/4-in.

HEAD WIDTH……………1 5/8-in.

RANGE IN-LB…………….150 – 3,000 in.-lbs.

RANGE FT-LB…………….12.5 – 250 ft.-lb.

RANGE Nm………………..17.5 – 340 Nm

ANGLE RANGE……….5 – 360 degrees

OPERATING TEMPERATURE…..40 – 110 degrees F

STORAGE TEMPERATURE……..0 – 122 degrees F

DISPLAY……………Four-digit LCD, unit of measure, angle, CCW and battery condition

OVERALL LENGTH…….26 in.

WEIGHT………………..3.7 lbs.

 

Sours: https://www.autoserviceprofessional.com/articles/2600-testing-snap-on-s-electronic-torque-angle-wrench

1/2 in. Drive Digital Torque Wrench

Product Overview

The QUINN® 1/2 in. digital torque wrench has a 72 tooth ratchet mechanism with a 5° arc swing that makes it easy to work in tight spaces. This 12.5 to 250 ft. lb. digital torque wrench offers speed, accuracy and an easy-to-read LCD display. LED lights and an audible beep indicate when the desired torque value or angle is reached. Guaranteed accurate within +/- 3% (clockwise) , this torque wrench can store up to 9 preset torque ratings. Switch easily between torque and angle modes for use with torque-to-yield fasteners.

  • Heavy duty hardened steel construction delivers a torque range of 12.5 to 250 ft. lb.
  • LCD screen displays up to 5 different units of measure
  • Program and store up to 9 pre-set torque ratings
  • Professional standard accuracy within +/- 3% (clockwise)
  • Beep and light indicate when torque setting is reached
  • Durable chrome polished finish
  • Measures in N-m, in-lb, ft-lb, kg-cm, and degrees
  • Includes protective molded storage case

Owner's Manual & Safety Instructions (PDF)

Sours: https://www.harborfreight.com/12-in-drive-digital-torque-wrench-64916.html
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PRODUCT

Home > PRODUCT > Wrenches & Torque Wrenches > Torque Wrenches

Digital Torque / Angle Wrench with Reversible Ratchet Insert Tool

Features

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Sours: https://www.toptul.com/style/frame/m3/

EDITOR’S PICK

CRAFTSMAN CMMT99436 Digital Torque Wrench

CRAFTSMAN CMMT99436 Digital Torque Wrench

  • 50 ft-lbs to 250 ft-lbs torque range
  • Available measurement units: ft-lbs, in-lbs, and Nm
  • Bi-material secure grip handle
  • Alloy steel construction with polished chrome finish

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Milwaukee 2466-22 M12 FUEL Digital Torque Wrench with One-Key Kit

Milwaukee 2466-22 M12 FUEL Digital Torque Wrench with One-Key Kit

  • 10 ft-lbs to 150 ft-lbs torque range
  • Available measurement units: Nm, ft-lb, in-lbs, & Kg-cm
  • Accuracy: +/- 2% clockwise & +/- 3% anti-clockwise
  • Plastic, rubber, and aluminum construction

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BUDGET PICK

GEARWRENCH 85077 Electronic Torque Wrench

GEARWRENCH 85077 Electronic Torque Wrench

  • 25.1 ft-lb to 250.8 ft-lb torque range
  • Available measurement units: Nm, ft-lb, in-lbs, Kgf-m, & Kgf-cm
  • Accuracy: +/- 2% clockwise & +/- 3% anti-clockwise
  • Alloy steel construction with chrome finish

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If you’ve done some engine work in the past, you sure have used a torque wrench at some point to precisely tighten nuts to the required torque value. However, you might have used one of those click-type model that are kinda outdated now. In today’s world, where electronic tools are becoming increasingly reliable and more affordable than ever, mechanical torque wrenches just don’t cut it anymore. Digital torque wrenches are not only more precise but also significantly more user-friendly. Consequently, if you are serious about your tool game, your average click-type torque wrench could use a slight upgrade.

Electronic tools are designed to make your life much easier while also increasing speed and efficiency in the workplace. And everything a mechanical torque wrench can do, a digital one can do even better. All you need is to program the required torque value and the wrench will then alert you when the pre-set value is reached. Some models even come with specific visual and audible warnings and a plethora of features that traditional click-type torque wrenches can only dream about.

The only problem? It is easy to get overwhelmed by the hundreds of options available online. So, to help you choose the best digital torque wrench for your needs, we have curated and reviewed some of the best digital torque wrenches currently on the market.

As usual, this list was created using the knowledge and experience gained after almost 15 years of working in the field. Nonetheless, I am not the absolute reference in the matter and different people may prefer different models. I tried to make sure to include different torque wrenches catering to various budgets and work types, but of course, I might have missed a couple. If you use a digital torque wrench not included in this list, make sure to leave a comment below and I’ll happily review it too.

Enjoy!

5 Best Digital Torque Wrench Reviews

1. GEARWRENCH 85077 Electronic Torque Wrench

GEARWRENCH 85077 Electronic Torque Wrench

The GearWrench 85077 electronic torque wrench is equipped with a 72-tooth ratchet mechanism with a 5° swing arc, making it really easy to operate, even in really tight spaces. And worth mentioning, GearWrench claims its digital torque wrench is accurate up to +/- 2% clockwise and up to +/- 3% counterclockwise—not an easy feat for an entry-level, budget-friendly model.

GearWrench’s digital torque wrench offers a torque range of 30 Nm to 340 Nm in its primary scale. An alternative scale measures torque in ft-lbs, starting at 25.1 ft-lb and going up to a maximum of 250.8 ft-lb. Apart from these two measurement units, you also get others such as in-lb, Kgf-m, and Kgf-cm. Although, in all honesty, you might never need the last two when it comes to auto mechanics, but you never know. Better safe than sorry, right?

You can select the unit you want and many other things like the torque ceiling by using the buttons next to the digital display. Once the wrench is close to your pre-set torque value, you get a warning followed by an audible buzzer, vibrating handle, and solid LED light when you’ve reached the target value.

The 85077 electronic torque wrench boasts an alloy steel construction with a rubberized handle for optimum grip. The handle area and the digital display housing are designed to resist oil, grease, and any other solvents that it will most probably be covered with at some point.

The GearWrench 85077 digital torque wrench is a great entry-level digital torque wrench perfect for DIYers and beginner mechanics. If you don’t regularly do a lot of engine work but still want to make sure you have a reliable digital torque wrench just in case, get this one. It’s pretty inexpensive and will last you for years. On the other hand, if you use your torque wrench every week, you might be better with one of the more professional options below.

Looking for a GearWrench digital torque wrench in 3/8″ drive instead? It’s here!

Highlighted features

  • 25.1 ft-lb to 250.8 ft-lb torque range
  • Available measurement units: Nm, ft-lb, in-lbs, Kgf-m, & Kgf-cm
  • Accuracy: +/- 2% clockwise & +/- 3% anti-clockwise
  • Alloy steel construction with chrome finish

Pros

  • Multi-layered target torque alerting system
  • Rubberized handle provides good grip
  • Easy to clean
  • Reasonably priced
  • Wide torque range with 5 available units
  • Comes in a blow-molded plastic carrying case for portability and secure storage
  • 1 year limited manufacturer warranty

Cons

  • Not suitable for critical applications

2. ACDelco Tools ARM317-4A Digital Torque Wrench

ACDelco Tools ARM317-4A Digital Torque Wrench

The ACDelco Tools ARM3174A is a digital torque wrench specially designed for critical automotive applications. Like the previous model, it is a 1/2” drive with a 72-tooth gearing system. Available measurement units include Kg-cm, Nm, and in-lbs and it offers a torque range of 5 ft-lbs to 99.5 ft-lbs, which is less than the previous model, but you get better accuracy at +/- 1.5% clockwise & +/- 2.5% counterclockwise.

However, the best part about the ACDelco Tools ARM3174A is that it comes with an angle indicator capable of measuring up to a maximum of 720°. Thanks to this feature, you won’t need to purchase an angle indicator separately.

ACDelco’s digital torque wrench comes with an industrial-grade anti-slip handle to make sure you never lack grip, even with hands covered in grease (ok, you might still need to wipe them from time to time but you get the point). There is also a backlit LCD screen you can use to set your target torque value and track the actual value in real-time. You even get visual, audible, and haptic feedback when the target torque is reached.

The ACDelco Tools ARM3174A digital torque wrench is perfect for those looking for an advanced and more accurate version of the previous model. The angle indicator adds significant value, but on the downside, you will have to make do with a narrower torque range.

Looking for an ACDelco digital torque wrench in 3/8″ drive instead? It’s here!

Highlighted features

  • 5 ft-lbs to 99.5 ft-lbs torque range
  • Available measurement units: ft-lbs, Kg-cm, Nm, and in-lbs
  • Accuracy: +/- 1.5% clockwise & +/- 2.5% anti-clockwise
  • Alloy steel construction with chrome finish

Pros

  • Auto shut-off functionality after two minutes left unused
  • Offered with an angle indicator
  • Great value for money
  • Easy to use ergonomic design
  • Backlit LCD display
  • Comes in a heavy-duty hard-shell case
  • 1 year manufacturer’s limited warranty

Cons

  • Narrower torque range compared to the previous model
  • Batteries not included

3. CRAFTSMAN CMMT99436 Digital Torque Wrench

CRAFTSMAN CMMT99436 Digital Torque Wrench

The Craftsman CMMT99436 is a ½” drive digital torque wrench designed for highly critical and heavy-duty applications such as torquing cylinder-head bolts where the tiniest of deviation from the required torque value can result in catastrophic consequences. Craftsman’s model offers a fully digital LED-backlit screen for optimum readability and you get a versatile torque range spanning 50 ft-lbs to 250 ft-lbs. Moreover, you can change the measurement unit to in-lbs or Nm (none of the more scientific/electronics-oriented units here but mechanics don’t really need that anyway).

Like the previous model, the CMMT99436 comes with an in-built angle indicator to make your life much easier. You might not come across bolts with torque sequences requiring specific angles, but trust me, when you do, you’ll be happy you have one. I’ve mostly seen head bolts with such procedures and it was a bitch (and rather nerve-racking) to torque them by marking the bolts with chalk and all.

Of course, Craftsman making mostly tools intended for professional use, you also get the usual convenience-enhancing features such as multi-layered alerts, a high-grip handle, etc. To put it simply, it has pretty much all the same bells and whistles as the previous ones in a higher-end package.

If you are a professional mechanic looking for an accurate, reliable, and heavy-duty digital torque wrench to use in the shop without breaking the bank, this is the one. In fact, our team of experts liked it so much that it was awarded the highly coveted “Editor’s pick” title.

Looking for a Craftsman digital torque wrench in 3/8″ drive instead? It’s here!

Highlighted features

  • 50 ft-lbs to 250 ft-lbs torque range
  • Available measurement units: ft-lbs, in-lbs, and Nm
  • Bi-material secure grip handle
  • Alloy steel construction with polished chrome finish

Pros

  • Sophisticated alerting system with dual LEDs
  • Great user interface
  • Wide torque range
  • Suitable for critical applications and rough use
  • Backlit LED display makes it usable in low-lit environments
  • Clear storage case for easy identification
  • Angle measurement functionality
  • Lifetime limited manufacturer warranty

Cons

  • Not much to say here… When it’s good, it’s good.

4. Milwaukee 2466-22 M12 FUEL Digital Torque Wrench with One-Key Kit

If you thought the previous model was impressive, wait till you see Milwaukee’s take on a digital torque wrench. Meet the Milwaukee 246622, the definition of a digital torque wrench cranked up to eleven. Worth mentioning, it’s the world’s first torque wrench fitted with an electric motor to do most of the tightening for you. All you need to do is the final rundown.

The 246622 torque wrench also comes with Milwaukee’s advanced digital platform “One-Key” that allows you high levels of customizations along with the ability to save final torque data for future reference. The onboard computer is operated by a large LCD screen where you can set a torque limit, switch between measurement units, choose between 6 pre-programmed languages, view saved data, and much more.

Next to the LCD display, there is a collection of LED lights that are part of the alerting system. As you reach near the target torque, white lights will appear progressively and turn green when the target torque is reached. If you keep going (not sure why you would do that but still…), the lights will turn red. Of course, during all three stages, the lights are also accompanied by audible and haptic feedback.

Moreover, you also get the widest torque range in the list, between 10 ft-lbs and 150 ft-lbs, while other available measurement units include in-lbs, Nm, and kg-cm. The Milwaukee 246622 is accurate up to +/- 2% clockwise and +/- 3% anti-clockwise—not the most precise out there but more than good enough for auto mechanic applications.

Milwaukee’s digital torque wrench on steroids comes with two rechargeable batteries and a charger. You might think that two batteries might be overdoing it and you would be right. Unless you torque bolts all day long on an assembly line, you will probably never even drain out of the first battery. However, Milwaukee’s batteries are interchangeable and can be used with other power tools from the M12 series.

The Milwaukee 246622 is by far the best digital torque wrench you can buy. Now, we realize that the high price tag will make it out of reach for most weekend DIYers and auto mechanic apprentices. And it’s ok. If it’s your case, you are much better buying a more affordable model that will still do the job just fine and spend those hard-earned bucks on power tools you’ll use much more frequently like your impact wrench for example. However, if you are a seasoned mechanic and you are looking to up your game and buy a torque wrench that will make your coworkers jealous, look no further and get the Milwaukee 246622. Trust me, you won’t regret it!

(In the spirit of full disclosure, I have to admit that this is the torque wrench I’ve bought and have been using at work for the last 2 years or so and I still love it as much as day one. It’s pretty awesome aside from the fact that everyone now comes asking to borrow my torque wrench since then…)

Looking for a Milwaukee digital torque wrench in 3/8″ drive instead? It’s here!

Highlighted features

  • 10 ft-lbs to 150 ft-lbs torque range
  • Available measurement units: Nm, ft-lb, in-lbs, & Kg-cm
  • Accuracy: +/- 2% clockwise & +/- 3% anti-clockwise
  • Plastic, rubber, and aluminum construction

Pros

  • Motorized operation Saves up to 50% time
  • User-friendly large LCD display
  • LED alerting lights with audible and haptic feedbacks
  • 6 available languages
  • Tough and durable body
  • Comes with a carrying case
  • Compatible with all Milwaukee M12 batteries
  • 5 years manufacturer limited warranty

Cons

  • On the expensive side (but worth every penny!)

5. ACDelco ARM602-4A Heavy Duty Digital Torque Adapter

ACDelco ARM602-4A Heavy Duty Digital Torque Adapter

The final product on the list is a wee bit different from what we’ve seen so far and is intended for weekend DIYers who know they will rarely need a torque wrench and think it might not be worth it to spend money on one (but of course still need one on rare occasions and not interested in just eye-balling it either). Instead of a full-blown digital torque wrench, the ACDelco ARM6024A is an adapter to turn your regular ratchet into one.

Simply attach this adapter onto your regular ½” ratchet’s drive and attach the required socket to the adapter. The adapter will then provide accurate torque readings through the LCD display in real-time.

ACDelco’s ½” drive digital torque adapter offers a torque range of 25 ft-lbs to 250 ft-lbs. Moreover, you can use the buttons provided to select your preferred measurement units and set the maximum torque limit. Once the pre-set limit is reached, the device will alert you with an audible buzzer and flashing LED lights.

The ACDelco ARM6024A is the perfect alternative for those who don’t use a torque wrench often or don’t have the budget to buy a full-fledged model. It is as accurate as previous models and is almost as capable. However, it’s a bit bulky and may not fit in tight areas, but still, it’s a pretty good compromise.

Highlighted features

  • 25 ft-lbs to 250 ft-lbs torque range
  • Available measurement units: Nm, ft-lb, in-lbs, & Kg-cm
  • Accuracy: +/- 1.5% clockwise & +/- 2.5% anti-clockwise
  • Digital torque wrench adapter for regular wrenches

Pros

  • Can be used with any ½” ratchet wrench
  • LED and buzzer for warning
  • Cheaper than a proper digital torque wrench
  • High accuracy
  • Wide torque range
  • Easy to mount or dismount
  • 1 year manufacturer warranty

Cons

  • LCD display may be hard to read when used deep in an engine bay
  • Makes your ratchet head much bulkier and may not fit in tight spaces

Accuracy

As you already know by now, applying the right amount of torque to bolts is of paramount importance in specific areas like engine head bolts. Even the slightest deviation can potentially result in severe problems and cause various components to not sit right and cause leaks. So, a digital torque wrench should be highly accurate to prevent such mishaps from happening. Most models in the list are at least accurate up to +/- 2% clockwise and +/- 3% anti-clockwise; this should be the minimum accuracy you are looking for in a digital torque wrench.

Torque range and measurement units

A digital torque wrench’s range is defined as the variation between the maximum and minimum torque limits it can measure. Each bolt needs to be tightened to a specific torque value, and these values can vary significantly. Torque wrenches with a wider torque range are obviously more versatile and will be suitable for a wider range of applications.

Most digital torque wrenches offer ft-lbs as the standard torque measurement value, mostly because most manufacturers will also use recommended torque values using this unit (most torque wrenches will also display Nm, which you may come across working on European car models).

If you are working on imported vehicles where the instructions are provided in another unit, say kg-cm, you will have to convert the values to ft-lbs. Doing this can potentially affect accuracy due to human error. So in order to eliminate the guesswork, make sure to buy a digital torque wrench with several available measurement units.

Nonetheless, if you mostly work on automotive applications, ft-lb and Nm should be more than enough.

Alerting methods

The last thing any mechanic wants is to over-torque any bolt. To prevent this from happening, digital torque wrenches come with specific ways of alerting the operator when the target torque is reached. These include using an audible buzzer, haptic feedback, and even flashing LED lights in some instances.

Each alerting methods of course come with their own set of advantages and disadvantages. Audible signals are especially useful when working in tight spaces when you can’t see the torque wrench’s display but are not the best in noisy environments. Haptic feedback fixes that but is not that useful when working with thick gloves (if you often work outside in the winter you know what I mean). And lastly, LED lights are super handy when working in low-light environment (which is pretty much every repair shop ever) but you gotta keep an eye on the display at all time.

To put it simply, when it comes to alerting methods, the more, the better!

User interface

Another essential factor to consider when choosing the best digital torque wrench is the user interface, which includes how you interact with the wrench’s computer system and how well it does what you want it to do. Some models may offer basic systems with a couple of buttons where each button is programmed to do several tasks; this can complicate things and be challenging to remember which button does what, especially if you don’t take out your torque wrench regularly.

Ideally, you’d want a torque wrench with a simple layout where each button is meant to control one parameter. However, that’s not always possible with entry-level model so you’ll have to be the judge here.

Grip

Using a torque wrench is all about slow and steady controlled motions to get the best possible results. You can’t achieve this if your hand keeps slipping off the handle due to a lack of grip (and I’ve rarely seen a mechanic with non-slippery hands). For that reason, you need a digital torque wrench with a good anti-slip handle designed to provide optimum grip at all times.

Price

Of course, any digital torque wrench’s price point and value for money is also an important factor. If you are looking for a wrench for critical applications such as engine head bolts, spark plugs, etc., the smart choice would be to go for a high-quality model, even if it costs a bit more. After all, buying a more expensive model that will last for years is still cheaper than buying two or three during the same period.

However, I know this is also not always possible. I remember when I started in the field, I had so many tools to buy at the same time, I really had to prioritize. If this is your case and you are soon preparing to start your career as an auto mechanic, keep in mind that it’s very unlikely you’ll be doing a lot of engine work right away. You’ll be changing a lot more tires and brake pads in the first few years so you’ll be much better investing in a good impact wrench and ratchet set instead. You’ll have more than enough time to focus on a torque wrench after you’ve received a couple of paychecks.

Frequently Asked Questions (FAQs)

Do I really need a digital torque wrench?

If you regularly use a mechanical torque wrench for critical applications that required utmost precision and accuracy, then yes, you need to try a digital torque wrench. It will make your life so much easier by automating a large chunk of the process and doing most of the hard work for you. Moreover, highly advanced models like Milwaukee’s are true game-changers in the industry. The brand claims it can cut your working time in half, thanks to the electric motor that does most of the tightening for you.

However, if you only rarely need to torque bolts, digital torque wrenches are usually much more expensive than their mechanical counterparts that still do the job just fine. After all, they’ve been fixing cars and overhauling engines with good ol’ click-type torque wrenches for years, right?

In all cases, just remember that you are still better with a cheaper torque wrench than no torque wrench at all. But honestly, if you torque bolts for a living, try a digital model. I promise you’ll never want to go back to mechanicals.

Do digital torque wrenches need to be recalibrated? If yes, then how often?

Yes! All torque wrenches, whether they are mechanical or digital, require frequent accuracy checks and recalibration. It is common practice to recalibrate torque wrenches once every year or after every 5,000 cycles, whichever comes first. However, the criteria can differ from model to model, so we recommend referring to your owner’s manual for more information. Furthermore, recalibration may also be necessary if the wrench has suffered a hard impact or extremely rough use.

And never drop your torque wrench or it will need to be recalibrated, or at least checked.

Is it worth getting a digital torque wrench adapter?

Digital torque wrench adapters like the ACDelco ARM6024A are designed to turn your regular ratchet into a digital one. They can be pretty accurate, but we still recommend getting a proper digital wrench if you plan on using it frequently. Adapters are only suitable for those who will use them once in a while, so spending on a proper digital model is not worth it.

Verdict

Now you have significant knowledge about digital torque wrenches that should help you pick the best model for you. I still want to say that we think that the Craftsman CMMT99436 is the best overall option. You get a wide torque range, decent accuracy, durable construction, and Craftsman’s trusted reputation.

However, if money is no limitation in your hunt for the best digital torque wrench, no other model even comes close to the Milwaukee 246622 M12 Fuel torque wrench. Simply put, it is the Rolls Royce of digital torque wrenches and will make you wonder why you didn’t buy one sooner.

Jean-Claude Landry

Jean-Claude is an Editor at GarageSpot.com and webmaster of TheMechanicDoctor.com. He has been a certified auto mechanic for the last 15 years, working for various car dealers and specialized repair shops. He turned towards blogging about cars and EVs in the hope of helping and inspiring the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

Sours: https://garagespot.com/best-digital-torque-wrench/

Wrench torque angle

Description

The Best Solution for all Threaded Fastener Torque Applications
The “DWA” Series of electronic Torque & Angle wrenches are the best solution for nearly all threaded fasterner applications. Even the simple application of nuts and bolt assemblies in today’s designs often require a torque pre- load for proper seating and a subsequent angular rotation for proper loading. This wrench employs the Patented Technology of precision torque and angular momentum sensing to control both parameters sequentially in a single continuous motion of the wrench. Electronics locate itself anywhere in space to provide a positional reference point and angular rotation of the handle around the ratcheting square drive axis.

Intuitive User Interface
An intuitive user interface works with the high-contrast LCD display to show torque and angle preset values, display modes and units selection, “ft-lb”, “in-Lb”, and “Nm”. Its real-time digital readout (auto track mode) emulates the precision of a dial type torque wrench. Its torque and angle preset function emulates the familiar click-type torque wrench by producing a handle vibration, LED indicators, and an audible alert at torque or angle preset measurement. Tri-colored LED’s provide real-time early-warning, torque/angle attainment, and over-torque alert. The display also captures peak torque readings in tightening or loosening directions, generally CW to identify maximum torque installations and CW or CCW break-away torque for quality audits of preinstalled fasteners.

The Most Advanced Torque and Angle Wrench on the Market
The DWA features ±1% accuracy of reading between 10% and 100% of full scale in both CW and CCW directions. The wrench is useable down to 5% of full scale with ±3% of reading precision. Its solid-state gyro sensor responds to angular momentum with a 1° precision when driven at a nominal speed of rotation. This wrench will retain calibrated accuracy through 5,000 full scale torque measurements or 20,000 1/2-scale measurements. Three wrench sizes are available, providing 1/4″, 3/8″, and 1/2″ drive. 36-tooth, ratchet heads, covering 12.5 in-lb to 600 ft-lb torque capacity.

All DWA series Torque & Angle wrenches comply with ASME B107.28-2005 (Type 1) and ISO-6789-2003 Standards. Factory calibration is performed using certified bars and weights that are traceable to the National Institute of Standards Technology (N.I.S.T.). Angular measurement is factory calibrated to a 90° rotation standard. Actual torque and angle readings and individual serial numbers are included on the calibration certificate.

Sours: https://digitoolsolutions.com/product/electronic-torque-and-angle-wrench-dwa-series/
Torque To Angle - Using a Torque Angle Gauge

An hour and I cant squeeze anything out of myself. Complained the woman.Bab, but that means you need to do an enema.

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And mine, look what beauty he sent.



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