[hamdani yusuf (OP)]

In the first picture, the angle indicates the applied torque, i.e. the flexion of the spring steel shaft, not the angle through which the bolt has been rotated.

It indicates the angle between the head and the handle. You are denying your own imagination, instead of my statement.

[alancalverd]

Anyone who has ever seen a flexion torque wrench will know that

the flexion of the spring steel shaft,

is indeed displayed as

the angle between the head and the handle.

though strictly you should have said "between the present position of the handle and a line drawn from the center of the head to the handle when the applied torque is zero" . But that is too obvious for most of us.

[hamdani yusuf (OP)]

In the second picture the head-handle angle remains at  < 30 deg until the applied torque exceeds the preset value, at which point the handle clicks through at least a further 30 degrees. This could be alarming and dangerous in a cramped working environment - my preset "clicker" doesn't have a hexagonal cam, just a single cam and a limit of about 5 degrees.

Don't confuse the torque indicator or limiter with the ratchet mechanism!

The hexagonal head can be replaced with other polygon with more sides so it works with smaller angle.

[alancalverd]

Aha! I've just found a device that does what you say! It's a Straumann dental implant ratchet torque wrench. Very clever, and prevents overtorqueing in a way that can't be achieved with a flexion or single-click device. There's an even neater French device that apparently doesn't require the dentist to ratchet the handle back and forth - even more comfortable for the patient.

[hamdani yusuf (OP)]

A Swift Introduction to Geometric Algebra

This video is an introduction to geometric algebra, a severely underrated mathematical language that can be used to describe almost all of physics.  This video was made as a presentation for my lab that I work in.  While I had the people there foremost in my mind when making this, I realized that this might be useful to the general public, so I also tried to make this useful to others as well.

It briefly describes torque at around 28:00.

[hamdani yusuf (OP)]

How Ratchets Work

We show the details of one of the most common tools used in the garage - the hand ratchet.  We learn how they work by taking apart a common 3/8" ratchet.  Includes closeup/macro views of the inner workings of a ratchet.  We show how the unit functions and then take it apart piece by piece.  Finally, a few quick recommendations on features to look for in a new ratchet - mainly the value of a fine-tooth geared anvil and pawl setup.

[hamdani yusuf (OP)]

The Vector Algebra War

There are a wide variety of different vector formalisms
currently utilized in engineering and physics. For example, Gibbs? three-vectors, Minkowski four-vectors, complex spinors in quantum mechanics, quaternions used to describe rigid body rotations and vectors defined in Clifford geometric algebra. With such a range of vector formalisms in use, it thus appears that there is as yet no general agreement on a vector formalism suitable for science as a whole. This is surprising, in that, one of the primary goals of nineteenth century science was to suitably describe vectors in three-dimensional space. This situation has also had the unfortunate consequence of fragmenting knowledge across many disciplines, and requiring a significant amount of time and effort in learning the various formalisms. We thus historically review the development of our various vector systems and conclude that Clifford?s multivectors best fulfills the goal of describing vectorial quantities in three dimensions and providing a unified vector system for science.

[hamdani yusuf (OP)]

Every Angle Unit Explained in 10 minutes

Timestamps

0:00 Turn
1:24 Degree
3:23 Radian
6:04 Gradian
7:52 Binary Angular Measurement