stoneaxe
Stainless
- Joined
- Mar 2, 2010
- Location
- pacific northwest
I want to make an ER 25 holder for an obsolete mill. The shank will fit the mill taper. There is not enough diameter for a stock straight shank ER 25 holder in a mill specific collet.
Is there a source for a ER 25 plug gauge that won't break the bank?
The taper could be checked with a ER collet with a ground rod inserted in it to hopefully hold the diameter,, but I do not know if it will be accurate enough.
Another approach would be to buy a ER 25 holder with a larger shank, and turn it to match the mill taper. I would need to turn the shank to diameter, cut the taper, externally thread the end, then mill a keyway. Seems like carbide might have a tough time with a hardened holder- is this an application for a CBN tool?
Is there a source for a ER 25 plug gauge that won't break the bank?
The taper could be checked with a ER collet with a ground rod inserted in it to hopefully hold the diameter,, but I do not know if it will be accurate enough.
Another approach would be to buy a ER 25 holder with a larger shank, and turn it to match the mill taper. I would need to turn the shank to diameter, cut the taper, externally thread the end, then mill a keyway. Seems like carbide might have a tough time with a hardened holder- is this an application for a CBN tool?