Harold Hall dividing head

[Susquatch]

@jcdammeyer - we have probably sideswiped this thread way more than reasonable. So let me just add one thought and then disconnect.

Do you know what I hate most about my phone camera?..... It is so good that I almost always forget to pack my SLR when I go places and then I have to live with the differences that do exist when they arise. Conversely, what I love most is that I don't have to bring my SLR along anymore because my phone is always in my pocket. Damned if I do and Damned if I don't! LOL!

 

[jcdammeyer]

Amazing how difficult it is to photograph a black twizzler.

And yes. I don't take my camera along as often either.

 

[PaulL]

I am a lazy technologist - photos go from my phone camera into Google photos, and from there I copy to my clipboard and paste into the text box. That long string is google's unique ID for that copy/paste. Everything else I've tried makes a round trip through my filesystem and makes me pick filenames and all sorts of annoyance.
Interestingly, I don't get the big superimposed filename when I look at my threads.

 

[Susquatch]

I am a lazy technologist - photos go from my phone camera into Google photos, and from there I copy to my clipboard and paste into the text box.

I am even lazier. I don't use a desktop to post here. I use my phone. So photos can be directly taken and inserted into my thread as I type using the attach file functionality.

In other words, I type along till I need a photo, then click on "attach file", and then I can choose the camera as a source or browse my google photos and insert from there, and then resume typing. Easy peasy.

 

[PaulL]

And it's done! The tension on the two 1/4"-20 nuts manage how loose it is when the main locking lever is not engaged - in other words when adjusting the rotation. Then the locking lever holds everything in place.
I'm surprised how rigid the whole assembly is, even with the ridiculous-looking stickout of the M3 ER32 holder. In a different world more of the M3 would fit in body of the indexer, but dimensions on the stock didn't seem to allow it - the spindle would interfere with the two locking bolts.

Here's an action shot, being used to make its own locking lever:

My only real disappointment with it is that milling the keyway into the arbor I *totally* messed it up. It has too much slop, and all my (well, all 3 of cheap chinese) sub-4mm end mills are trashed, to no avail. I'm doing something very wrong with those little end mills that's destroying them as fast as they meet the steel. I'll cut a fresh keyway on the opposite side of this terrible one when some less cheap mills arrive - maybe they will work better?

Paul

 

[YYCHM]

How many teeth are on that indexing gear?

 

[PaulL]

How many teeth are on that indexing gear?

60 on this one. It's one of the change gears from my lathe.
With 60 teeth I get 120 divisions - 3 degree precision. Each tooth provides two positions, one with the pin in the gullet of the tooth, and the other with the pin rotated 90 degrees to expose a gap in the pin that engages the top of the tooth.