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Old 05-24-2019, 06:10 PM
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milomilo milomilo is offline
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Default Hex Indexing Jig

Thanks to digr, I started making a tool for quick indexing on the mill. It will be holding a 1/2" drill chuck for those odd sized pieces of round stock that I do not have a collet for. Bubba squared everything up on the nut with his surface grinder for me.

The nut is 2 5/8" and is less than .001 off across the flats.

Next is to turn a piece of round stock for a press fit in the hole in the nut. Then bore out a smaller 3/4" hole for the drill chuck arbor. This will be a slip fit and the nut will have two tapped holes to secure the drill chuck arbor. That way the drill chuck can be changed if necessary.

More later as I do some more machining work.
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Last edited by milomilo; 05-26-2019 at 09:07 PM.
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  #2  
Old 05-26-2019, 01:10 AM
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Quote:
Originally Posted by milomilo View Post
Thanks to digr, I started making a tool for quick indexing on the mill. It will be holding a 1/2" drill chuck for those odd sized pieces of round stock that I do not have a collet for. Bubba squared everything up on the nut with his surface grinder for me.

The nut is 2 5/8" and is less than .001 across the flats.

Next is to turn a piece of round stock for a press fit in the hole in the nut. Then bore out a smaller 3/4" hole for the drill chuck arbor. This will be a slip fit and the nut will have two tapped holes to secure the drill chuck arbor. That way the drill chuck can be changed if necessary.

More later as I do some more machining work.
Chris, don't You have an indexer? you could make a piece of round to fit one of the collets with the chuck on it. ??
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Old 05-26-2019, 09:04 AM
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Chris, don't You have an indexer? you could make a piece of round to fit one of the collets with the chuck on it. ??
Yes, I have a spin indexer. No 5C collets yet. This nut system is a quicker way to put 3 flats on a drill.
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Old 05-26-2019, 08:51 PM
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I like the idea, Chris. Keep on cookin'
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Old 05-29-2019, 05:48 PM
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Finished it off today. Drilled a hole and added a roll in between the nut and the insert. Drilled and tapped two 1/4-20 holes for set screws to hold the drill chuck arbor in the insert. The insert was machined .001 over and took about 5 tons pressure to push it in. Need to find a chuck key next. Have one but not a good fit, but works kind of.

Thought it would also work for doing flats on a drill, but it does not center a two flute drill accurately in the drill chuck. Maybe have to buy the 5C collet set I have been putting off. Still good for round stock though.
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Old 05-29-2019, 05:51 PM
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More pics.
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Old 05-30-2019, 05:38 AM
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Originally Posted by milomilo View Post
Finished it off today. Drilled a hole and added a roll in between the nut and the insert. Drilled and tapped two 1/4-20 holes for set screws to hold the drill chuck arbor in the insert. The insert was machined .001 over and took about 5 tons pressure to push it in. Need to find a chuck key next. Have one but not a good fit, but works kind of.

Thought it would also work for doing flats on a drill, but it does not center a two flute drill accurately in the drill chuck. Maybe have to buy the 5C collet set I have been putting off. Still good for round stock though.
Chris, the ones from CDCO have bee working out well and priced right plus I had ordered the three main square stock sizes of 5c collets. or the ones I mainly use 1/2, 3/4, and 1". they were too cheap priced not to at the time.
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Old 05-30-2019, 08:54 PM
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Chris, the ones from CDCO have bee working out well and priced right plus I had ordered the three main square stock sizes of 5c collets. or the ones I mainly use 1/2, 3/4, and 1". they were too cheap priced not to at the time.
Been watching Ebay for a used set. Hoping to get a full 1/64th set at used prices.
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Old 05-30-2019, 11:22 PM
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Been watching Ebay for a used set. Hoping to get a full 1/64th set at used prices.
Chris.

I'll go through and see tomorrow what I have in the way of extras in the 5C collets and let ya know the sizes...

I think I have some "might" have some German manufactured collets if my memory serves right...

I'm just not sure of if they "are or are not" oddball sizes and prolly not a full set. but you'd be welcome to them if they are what you need.
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Old 05-31-2019, 11:02 AM
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Chris.

I'll go through and see tomorrow what I have in the way of extras in the 5C collets and let ya know the sizes...

I think I have some "might" have some German manufactured collets if my memory serves right...

I'm just not sure of if they "are or are not" oddball sizes and prolly not a full set. but you'd be welcome to them if they are what you need.
I probably need a complete set. Thanks for looking though.
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