Thread: Can I cut a sizing die with a finish chamber reamer ?

Could do all your roughing cuts to get the die close to size and then get the part nice and hot, and run the reamer. Maybe it will contract enough at room temperature to give the correct clearance.
Probably better to have some sort of layer put on it like other have suggested. Hard chrome would likely make for an indestructible die.

Originally Posted by SixtyTen

Could do all your roughing cuts to get the die close to size and then get the part nice and hot, and run the reamer. Maybe it will contract enough at room temperature to give the correct clearance.
Probably better to have some sort of layer put on it like other have suggested. Hard chrome would likely make for an indestructible die.

especially if you used SS as it expands a lot when warm. take it up to 100 degrees and it will have grown 0.05mm