Indexing on a 80mm3" rotary table

[SmithDoor]

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⫷⸻❋ Every division 2 to 100 ❋⸻⫸​

Here chart I found internet
Using a 3" [80mm] Rotary table with a 36 tooth gear.

on second page on right you see a dot on a few division it not %

Dave

Dave

 

[timo_gross]

Here a EXCEL for indexing Chart.
Had to zip

Dave

Did not get what it does.

 

[SmithDoor]

Did not get what it does.

Yes I wrote the excel worksheet.

I was need to do a few scribe marks on cylinder for project..

Did not remove the vise and setup the Brown & Sharp copy Dividing head.
I waiting for small chuck to coming for next part and it is to cold ❄ too.

Dave

 

[SmithDoor]

Did not get what it does.

If know any clock builders . They would lkie the 59 tooth indexing for moon phase
That only know that is hard to come by.

When I buy a new large lathe I get the 127 tooth for metic threading and 157 for worm gears. That only for replacement work.

There few other sizes that need for some hobbies. Since do my own designing I say with what can easily do in shop.

On most projects a treat I like using is using threading on lathe most where do not need a threading.

First had Thread and nut for a drill press. So goto book and look what to use it odd thread size.
Then realized it close to 40 tpi. My lathe had lead screw 4 tpi. So ingauge at any and did not need a threading dial.

This works for metric lathes too. The lathe I have today is 2mm. Fast easy I can engage any time 2mn, 1mm and 0.5mm threading.
This treat is only helpful if doing both the shaf and nut.

Some things I use metric size and inch threads.
My new lathe is metric so now inch shaft will have 2mn, 1mm or 0.5mm thread size
.

Dave

 

[SmithDoor]

Here a simple drawing for indexing.
Note Use simple thumb screw for indexing pin.
On the set collar is the ring with the indexing pins not shown

Dave

 

[SmithDoor]

Here is a simple chart for everyday indexing. PDF file for printingon black & white printers

Dave

 

[SmithDoor]

Chart for simple indexing