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The reference to align the indent in the book is for original bearings as set at the factory. Once replaced, that indent is no longer relevant and a new one should be made after preload is set. (Told to me by a large B.P. rebuilder) My spindle nut was completely tight and the spindle still had ~.035 of vertical play before and after full rebuild. All the B.P. places were stumped as to why considering it was O.G. everything and all in great condition. We measured 100 times, replaced the spacer packs, new nut etc. Didn't want to cut the nut cause of seal interference (Fyi, the rings under the spindle cap nut are called a "Labrynth seal" and are to keep junk out without contact. Last resort was to put a wave washer in place then preload by feel. It's been that way for a few years now and tho i don't do daily or heavy work on it, the machine still holds tolerance to .0004-6 depending on my attitude that day. It's good enough for the girls I go out with !

Excellent video, getting a used BP mill and can use this video to help rebuild it. Thanks.

Just found your channel and Subscribed. Very nice work

There's a formula for using extensions & for critical issues it needs to be followed.

Average in the start: 47.75 Average with adapter inline: 57.23 Average with adapter slightly less than 90deg: 52.78 Average with adapter slightly over 90deg: 51.75 Average at the end: 49.75 The small multiplier that is left after rotating the adapter 90deg is probably due to the angle of the torque wrench to the force. That gives a slightly longer arm from the force to the application point.

I intuitively knew this without watching...

Thanks for a great video. Would you please do this again with a u joint at the meter and a long extension going to the torque wrench. I am curious if eliminating the side force makes a difference at the meter. In theory it should not.

Just as a question, did you cycle the torquewrench befor you started the test. I watched quite some time ago a video where another youtuber tested torquewrenches. He got a bit strange results as some higher quality wrenches were as good out of the box as lower quality ones, but then improved in a test where he just cycled them a lot of times beyond the lower quality ones. In the comments one person who was working a lot with torque wrenches that at the place they worked at, they had to cycle the torque wrenches befor using them on what they wanted to torque.

T = r x F. r is the distance from the center of the handle (usually there's a pivot point with a marker on the handle so you can measure it) to the center of the fastener. It does not matter how many corners it turns on the way, except that some of the force will be wasted in bending any attachments/adaptors. Sorry about not using D. I learned it using vectors. When the angle of force is at right angles to the r vector, you can drop the vector notation and just multiply F and D like everyone else says. But at any other angle you need the cosine to use scalar notation.

I wish you had tried a couple other positions like 135 or 180 degrees or maybe tried to dial it in ti see if any position got back close to the base line

Multiplayer torque wrenches ate one of ,y favourite games

what is the model number of the CDI ?

for some (not understandable) reason these (used) machines are sold for very high price, while a gantry CNC router will do everything this machine does and more + it is more precise and programmable. It is like people who own these old machines don't want to admit they lost money due to technological advances

wow! the arbor press is the machine I need! too bad you didn´t take the shot of it in full size

A proper test will always win over a theoretical argument. The strangest part of this for me is that people who are proved wrong by a test will put more effort into refuting the test results than into understanding why the test is correct. Denial is the mort powerful force in the known universe!

T = F x D, when rotating it you need to look at the hypotenuse of the triangle made between the 3 points, that is the D in your T = F X D, it is slightly longer than the handle when at 90 degrees, thus slightly more torque. Or more simply, use the T = F X D that accounts for angle, τ = rFsin(θ)

The multi-player multiplier.

Correct me if I'm wrong but don't you get the right torque by positioning the adapter such that the length from the handle to the fastener is same as from the handle to the drive of the wrench? That's an unnecessarily convoluted explanation but imagine a circle going through the head of the wrench with the center on the handle. Now just position the end of whatever adapter on this imaginary circle. Works for any adapter shorter than 2x the length of the wrench.

Finally a tool I really need. I just ordered the ER 32 and ER 40. Can't wait for you to release the other ER adaptors. I hope that you plan on making one for TG collets as well.

This looks very good for accurate tightening of ER collets. The relatively low torque variation with positioning is within the accuracy limits of most torque wrenches. Very good display of total lever length being changed slightly by the adapter. Any change in the effective length of torque wrench handle to center of drive causes a difference in applied torque.

Informative video thanks for sharing.

What a cute little lathe and it really works. 😅

❤

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Super excited and thrilled for this! Thanks Dustin.