Group Project: Dividing Head - The Build

Cool. Thanks. Frankly, Jeff has done a great job with this complex set of parts. I'm a little surprised more issues have not come up.
For anyone following I may go off script for some of the next parts.
I just got and ER32 collet chuck to use as a spindle. The shank is only 3.000" long. I am trying to see if I can make this work.

1717262369762.png
Note this image is actually a 1.25 but I have a 1.500

Here's where I am. The trunnion pivots now!
1717262678848.png
 
@extropic
I do plan to update the original drawings so that someone down the road does not have issues.
At least I will once we know what all the updates are.
I went to the OP and found that I am no longer able to edit it.
I have reported my OP to ask for permission for me to be able to still edit it. Or maybe I can get a mod to do the edits for me.
 
Flyinfool said:
@extropic
I do plan to update the original drawings so that someone down the road does not have issues.
At least I will once we know what all the updates are.
I went to the OP and found that I am no longer able to edit it.
I have reported my OP to ask for permission for me to be able to still edit it. Or maybe I can get a mod to do the edits for me.
Click to expand...
Perfect. Thanks.
I'm sure a Staff member will be able to swap the attachments for the finals (as built) when you're ready.
 
Started laying all of this out and have identified a couple more minor changes.
The cap that goes on the Aux Plate end of the trunion will also need to be a bit smaller in diameter and the hole pattern changed.
 
The cap on the aux base may be unnecessary. The other end is the clamping end. I think it will be pretty rigid without it.
Another potential issue. The bushing specified from MMC have an ID of 1.507. The spindle is 1.500. 0.007 is too much slop for my taste. Could we find bushings that are 1.503 or go to a 1.504 spindle.
Thoughts?

Maybe these?
www.mcmaster.com

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
www.mcmaster.com www.mcmaster.com
 
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You are right. the Aux end may not need a plate. It can always be tried without a plate and one added if needed.
I have the new drawings for the aux end based off of a 2.000 diameter.
I have moved the worm assy in to 2.100.
I used the relief that was already in the Aux Plate to make a 180°sweep over the top so now you can rotate in either direction, also moved it in a bit to allow room for the housing.

I am still working i the 3D model and have not fixed the drawings yet.
 
Great! I was wondering about the 180 deg sweep. I did not do that. I was afraid the shift lever would be a problem?
 
rwm said:
The cap on the aux base may be unnecessary. The other end is the clamping end. I think it will be pretty rigid without it.
Another potential issue. The bushing specified from MMC have an ID of 1.507. The spindle is 1.500. 0.007 is too much slop for my taste. Could we find bushings that are 1.503 or go to a 1.504 spindle.
Thoughts?

Maybe these?
www.mcmaster.com

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
www.mcmaster.com www.mcmaster.com
Click to expand...
Bronze & Olite bushings are commonly oversized (free state) because the ID "shrinks" when the OD is press-fit in a housing. This is discussed in the Oilite technical literature.
 
@extropic tropic - I am aware of that. It is still too sloppy. Oillite makes bushings that are 1.502 ID also. Mine went from 1.507 to 1.506
@Flyinfool - Please check the spindle index plate hole and the index pin. It appears to be a 1/8 pin in a 3/16 hole? Doesn't look right.
EDIT: I am incorrect on this. I think the trunnion lock pin is used here also? It looks like a .197 tapered pin in a .188 tapered hole. Correct?

I'm starting on the plate now.
 
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