The Purpose of Torque Angle Wheels: Explained

In summary, the purpose of using a torque angle wrench is to accurately set the bolt load without the unknown variable of friction affecting the torque measurement. This method is especially important when reusing old or damaged parts, as the torque measurements may not be reliable. The angle measurement allows for a more precise tightening of the bolt, ensuring the proper clamping force is achieved. This method is becoming more popular with the availability of cheap electronic position measurement and can also be found in the form of smart bolts with built-in force transducers.
  • #1
qitara
9
0
Hi

Obviously the purpose of using a torque wrench is to tight a bolt to a specific tightens, but what i can't comprehend is the purpose of using a torque angle wheel ?

Why are they used, is the torque wrench not enough ?
 
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  • #2
I believe what you are referring to is a method of torqueing a fastener by tightening it until it is hand tight and then turning it X degrees farther. First I had heard of this method was torqueing a timing belt pulley on a Deutz industrial diesel. No keyways or anything, just tighten the heck out of it. In the case of the timing belt pulley there was a significant portion of the bolt between the head and the threads as they went into the end of the camshaft that was allowed to stretch. The actual foot-pounds spec was not mentioned.
 
  • #3
qitara said:
Hi

Obviously the purpose of using a torque wrench is to tight a bolt to a specific tightens, but what i can't comprehend is the purpose of using a torque angle wheel ?

Why are they used, is the torque wrench not enough ?

I just googled "torque angle wheel" and came up with only your post.

Can you post a link to the device you are talking about?
 
  • #4
Try googling "torque angle wrench". For example
http://www.eastwood.com/digital-electronic-torque-angle-wrench-3-8-drive.html

Averagesupernova is right. The "traditional" style of torque wrench is not a very accurate way of setting the bolt load, because there is an unknown amount of torque being used to overcome friction when tightening the bolt, especially if you are rebuilding something and re-using the old parts.

That was not too important for a "low tech" design where you could allow a large safety factor between the required load in the bolt and over-stressing it, to allow for a large range of friction force.

That is no longer good enough for some purposes. so an "angle wrench" measures the angle the bolt head is turned through. That was not very practical until cheap electronic position measurement was available, but it can be now built into the handle of a normal-looking wrench, plus a digital readout of the torque (and audible signals when you reach the required values, etc) instead of the old scale-and-pointer method.

FWIW for some applications, the bolts themselves have built-in force transducers, so you can check the bolt load during maintenance without the risk of over-tightening the bolt "just to check it isn't loose".
http://www.strainsert.com/products/force-sensing-bolts-studs-general-product-information/
 
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  • #5
AlephZero said:
Try googling "torque angle wrench". For example
http://www.eastwood.com/digital-electronic-torque-angle-wrench-3-8-drive.html

Averagesupernova is right. The "traditional" style of torque wrench is not a very accurate way of setting the bolt load, because there is an unknown amount of torque being used to overcome friction when tightening the bolt, especially if you are rebuilding something and re-using the old parts.
Interesting. My only experience with such a thing has been when changing my oil filters. "Seat, then tighten 3/4 turn"

This new concept does make sense.
That was not too important for a "low tech" design where you could allow a large safety factor between the required load in the bolt and over-stressing it, to allow for a large range of friction force.

That is no longer good enough for some purposes. so an "angle wrench" measures the angle the bolt head is turned through. That was not very practical until cheap electronic position measurement was available, but it can be now built into the handle of a normal-looking wrench, plus a digital readout of the torque (and audible signals when you reach the required values, etc) instead of the old scale-and-pointer method.

FWIW for some applications, the bolts themselves have built-in force transducers, so you can check the bolt load during maintenance without the risk of over-tightening the bolt "just to check it isn't loose".
http://www.strainsert.com/products/force-sensing-bolts-studs-general-product-information/

Smart bolts? :thumbs:

My friend should have probably used those. He rebuilt a small block '68 Chevy engine last year. 15 seconds after he started the engine, he heard some knocking, then the pistons started flying, as he apparently hadn't properly torqued down the connecting rod bolts.

Though he'd probably need bolts smart enough to shout at him; "Hey! Old dude! I sense that you've torqued down 31 of my brother bolts, but not me. What's the deal?"

----------------------
writes down patent idea #8,532,081
 
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  • #6
OmCheeto said:
I just googled "torque angle wheel" and came up with only your post.

Can you post a link to the device you are talking about?


There you go
http://images.hemmings.com/wp-content/uploads//2013/08/torqueanglegauge_700.jpg

P.S

There is a few videos about this on YouTube, but I still don't get the idea of it
 
  • #7
qitara said:
There you go
http://images.hemmings.com/wp-content/uploads//2013/08/torqueanglegauge_700.jpg

P.S

There is a few videos about this on YouTube, but I still don't get the idea of it

Aleph's explanation made a lot of sense to me.
If I were to try and expand upon it, I'd probably screw it up.

Oh what the hell. They can only ban me.

Imagine you have two sets of nuts and bolts that you want to clamp something together with.
One set is new, and all lubed up with motor oil.
The other set, is old, dry, nicked, bent, and rusty.

Now it's quite possible, that with the old set, you could reach the maximum torque limit even before the nut and bolt have started clamping down. So there, you would want to seat the pair, and then torque them down using the angle method, as the torque measurements might be extremely off.
 
  • #8
OmCheeto said:
Aleph's explanation made a lot of sense to me.
If I were to try and expand upon it, I'd probably screw it up.

Oh what the hell. They can only ban me.

Imagine you have two sets of nuts and bolts that you want to clamp something together with.
One set is new, and all lubed up with motor oil.
The other set, is old, dry, nicked, bent, and rusty.

Now it's quite possible, that with the old set, you could reach the maximum torque limit even before the nut and bolt have started clamping down. So there, you would want to seat the pair, and then torque them down using the angle method, as the torque measurements might be extremely off.

Well let's assume that this is in a case where you have dirty old bolts and using a cheep torque wrench, in this case you'll use a torque angle gauge to be on the safe side. But if a good shining torque wrench where used with new fresh bolts, would it be necessary to use the angle gauge ?
 
  • #9
That all depends on your application, and what accuracy of bolt preload is required.
 

FAQ: The Purpose of Torque Angle Wheels: Explained

1. What is torque angle and how does it affect wheels?

Torque angle is the angle at which the wheel rotates in response to torque, or twisting force. It is a measure of the resistance of the wheel to rotation and is an important factor in determining the stability and handling of a vehicle.

2. How does torque angle affect vehicle performance?

Torque angle can significantly impact the performance of a vehicle, particularly in terms of its handling and stability. A larger torque angle can result in better traction and stability, while a smaller torque angle can improve the vehicle's agility and maneuverability.

3. What factors contribute to torque angle?

There are several factors that can contribute to torque angle, including the size and weight of the vehicle, the type and quality of the tires, the condition of the suspension and steering systems, and the alignment of the wheels.

4. How can torque angle be adjusted?

Torque angle can be adjusted by making changes to the suspension and steering systems, such as adjusting the camber, caster, and toe angles. It can also be affected by changing the size and type of tires, as well as the weight distribution of the vehicle.

5. Why is it important to understand the purpose of torque angle wheels?

Understanding the purpose of torque angle wheels is essential for ensuring the safe and efficient operation of a vehicle. It can also help in diagnosing and correcting any issues with the vehicle's handling and performance, and can contribute to a smoother, more comfortable driving experience.

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