Torque wrench specs & features for small to medium jobs

Asked by: Jeff Shah

Torque capabilities of pneumatic torque wrenches range from 118 Nm, up to a maximum of 47,600 Nm. A pneumatic motor using compressed air is the most common source of power for pneumatic torque wrenches, which typically require 20–25 CFM.

What is the specification of torque wrench?

3.1 Operating Torque : Between 200 Nm to 2500Nm 3.2 Weight : approx 7 kg 3.3 Square size : ¾” (approx 19 mm) 3.4 Ratchet type : Push-through 3.5 Ratchet teeth :Fine 60 to 70 teeth 3.6 Length : 800 mm to 1200mm 3.7 Length (incl ext Handle) : 1500 mm 3.8 Accuracy : +/- 3% 3.9 Standard socket size required : Std 12 to 42

What are torque specifications?

By definition, torque refers to the amount of rotational force at the point of application. When attaching a wheel to a vehicle, torque specifications are the amount of force recommended on the hardware to ensure proper installation.

How do you read torque wrench specs?

Look at the meter at the bottom of the torque wrench.



The numbers represent the amount of torque in either foot-pounds (ft. -lbs.) or Newton meters (Nm). Wherever the arrow is pointed designates the amount of torque that you’re applying to a lug or nut. In the stationary position, the wrench should read 0.

How much torque do I need in a torque wrench?

Very heavy duty automotive fasteners require between 200 and 1,000 ft. lbs of torque, or even higher amounts. Applications include camshaft sprockets and harmonic balancers. Many off-road vehicles or performance racing vehicles will require torque applications in this range as well.

Are torque specs important?

Too-tight exhaust manifold bolts can cause the manifold to crack. Torque specs are so critical to proper car repair that most shop manuals provide them along with repair steps and then also include them in back-page tables with fastener location, designation, and individual specs.

How do I choose a torque wrench?

Choose a wrench with an accuracy of plus or minus 5%. Check the torque wrench calibration for the date and accuracy as per the manufacturer’s settings. When a torque wrench is well-calibrated, it will have clear scale visibility. The longevity and accuracy of the torque wrench depend on how well it is stored.

How do I find torque specs?

Where To Find The Correct Manufacturer Recommended Torque Specs. The torque specs for the axle nut (and other nuts and bolts) should be listed in the dealership/shop guide provided by the manufacturer. If you can’t find that information, or if you don’t have a guide, you can find the specs in the service manual.

How do you use torque specs?

Quote from video: It's as simple as it looks just tighten it until it clicks. And then you're good to go.

How do you read a nm on a torque wrench?

Quote from video: The default measurement for this tool is in foot pounds. This means that each notch on the fine scale represents an even foot pound this can make it a task to set torque numbers in newton meters.

How much torque do I need?

To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.

What is the torque for lug nuts?

Under- or over-tightening wheel-attaching hardware can be damaging and dangerous.

What happens if you over torque?

Everyone who has ever worked with fasteners has accidentally messed one up at some point. One of the most damaging ways to do that is by over-tightening, or over torquing the fastener. This can result in stripping screws, snapping screw heads and damaging pre-tapped threading.

What happens if you dont torque spec?

In the case of insufficient torque, it’s the stud or the bolt itself that suffers all the impact, causing it to shear. Alternatively, the engine’s vibrations can cause the bolt or nut to come undone, displacing the tensioner.

What is the best size torque wrench to buy?

How to use a Torque Wrench PROPERLY

What is the use of torque wrench?

A torque wrench is a tool used specifically to adjust nuts and bolts. It offers additional leverage for tightening difficult and hard-to-reach parts, making it a go-to piece for auto mechanics, electronics specialists and machinery repair professionals.

What is the usable range of a torque wrench?

In general, most mechanical wrenches have a useable range from 20% to 100% of full scale. Most electronic wrenches have a useable range from 10% to 100% of full scale. 4.

How is bolt torque measured?

After fastening the bolt, make use of a torque measuring tool to mark off the tightened bolt and the product/workpiece. Apply additional force in the tightening direction until movement is noticed. Recording the reading will indicate the residual torque originally applied to the joint.

Who makes the best torque wrench?

4 Best Torque Wrenches

• Editor’s Choice Torque Wrench: CDI Click Type Wrench.
• Best Digital Torque Wrench: ACDelco Digital Torque Wrench.
• Best Split Beam Wrench: Precision Instruments Split Beam Wrench.
• Budget Pick: Tekton Click Wrench.

What kind of torque wrench is most accurate?

Dial-type torque wrenches are generally considered to be one of the most accurate types of the torque wrench. The dial-type wrench is the only type of torque wrench where the final reading is not easily affected by the hand-hold position on the wrench.

What is the best value torque wrench?

Comparison of the best torque wrench for cars