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All Springer/NP/PCP Air Gun Discussion General > Machine Shop Talk & AG Parts Machining

5C Collet Rant

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Ronno6:
Why the heck do 3/4" 5C collets have a range of +.000/-.001"
when even tight tolerance 3/4" or .750" 6061 has a +.001" tolerance?????????

GEEEEEEEEEEEEEEEEEEEEEEEZZZZZZZZZZZZ

Psipumper:
I am always breaking the rules then.
They aren’t going to work properly though every time .005 undersize but can be bumped in while indicating for a spin fixture or light cut if needed .They definitely don’t work well with oversized stock.

Ronno6:
The typical 3/4" 6061 I get measures .752" to .754" O.D.

ER32 collets don't like it much, but I get by.
Now that I am setting up a Hardinge with 5C collets. looks like I have to do some skim cuts.......
McMaster catalogs tight tolerance 6061 that is +.001, but it is out of stock.

I am fearful of screw machine rod stock pricing.

Firewalker:

--- Quote from: Ronno6 on March 19, 2023, 06:02:26 PM ---Why the heck do 3/4" 5C collets have a range of +.000/-.001"
when even tight tolerance 3/4" or .750" 6061 has a +.001" tolerance?????????

GEEEEEEEEEEEEEEEEEEEEEEEZZZZZZZZZZZZ

--- End quote ---

Ever watch "This old Tony" on YouTube?

Ronno6:

--- Quote from: Firewalker on March 19, 2023, 09:11:08 PM ---

Ever watch "This old Tony" on YouTube?

--- End quote ---

I'll give him a look....
Anything in particular I should be looking for?

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