"Tightening torque and torque wrenches explained" article comments

[BikeGremlin]

This is a thread for comments related to the BikeGremlin article:

Tightening torque and torque wrenches explained – 101

Any questions, additions, and (especially) corrections are more than welcome.

Relja BreakerBar Novović

 

[VlPo]

About cheap digital "cubes"…
Yes, they do not shine with accuracy. And I even wanted to throw out my copy after buying a good click key. But I changed my mind…
My click key only works for one direction of effort application. However, there are times when it is necessary to tighten the reverse thread. The "cube" works in both directions. And you can not pay attention to its absolute accuracy at all, more or less normal repeatability is enough. So I clamp the bit in a vise, put a "cube" on it, insert a click key with a set tightening torque into it and tighten it until it clicks. The display of the "cube" shows some, albeit not exact, value. After that, I set this value on the "cube" and tighten the connection with the reverse thread.
Yes, it's a longer way. But for the sake of a few times a year, it is quite suitable.

I hope that I have written clearly and the english-speaking audience will understand the meaning of my words.

 

[BikeGremlin]

About cheap digital "cubes"…
Yes, they do not shine with accuracy. And I even wanted to throw out my copy after buying a good click key. But I changed my mind…
My click key only works for one direction of effort application. However, there are times when it is necessary to tighten the reverse thread. The "cube" works in both directions. And you can not pay attention to its absolute accuracy at all, more or less normal repeatability is enough. So I clamp the bit in a vise, put a "cube" on it, insert a click key with a set tightening torque into it and tighten it until it clicks. The display of the "cube" shows some, albeit not exact, value. After that, I set this value on the "cube" and tighten the connection with the reverse thread.
Yes, it's a longer way. But for the sake of a few times a year, it is quite suitable.

I hope that I have written clearly and the english-speaking audience will understand the meaning of my words.

A very good point. For what it's worth, as a non-native English speaker, I can understand you perfectly.

The article Accurate vs Precise explains and defines the difference. With those definitions in mind, I would say that your digital torqe "cube" is very precise, but not very accurate.

Torque measurement in both directions is definitely very important for some bicycle service tasks (bottom brackets come to mind first). My original plan was to explain that in a separate article, with a "working" title: "Torque wrench buying guide" (unless I think of something more creative ).

Relja

 

[VlPo]

With those definitions in mind, I would say that your digital torqe "cube" is very precise, but not very accurate.

I know what you're talking about. "My" cube can be used quite normally in the range of ≈2.5-6Nm. With great effort, there is a progressive error - you specify 10 Nm, but in fact it is somewhere 13-14 Nm. I am somewhat prone to perfectionism, especially with regard to carbon fiber... And for me, such a mistake is unacceptable.

In general, I use several keys. Where precision is needed, I use a click wrench, and for locking cassettes and brake discs, I use a beam wrench.

 

[VlPo]

The article Accurate vs Precise explains and defines the difference.

A very necessary article
By education, I am a locksmith of control and measuring devices and automation. And for me, these concepts are self-evident. But my wife is still disoriented in the definitions

 

[BikeGremlin]

I finally finished the torque wrench buying guide.
Hope it helps at least one person.

As always, any additions and corrections are more than welcome.

Relja