06-04-2020, 11:10 AM
Agree with f350ca. Rough bore, outside, finish bore.
As to distortion, much of that will be due to heat. Keep your chips small, and your cuts reasonable, and stress will be minimized. Use oil to reduce heat. Unless your chips are coming off blue and smoking, you will be fine.
Cast will be less susceptible to distortion, but if stresses get to high, it won't warp, it will crack. You can always recut threads if distortion is an issue, but a cracked part is scrap.
As to distortion, much of that will be due to heat. Keep your chips small, and your cuts reasonable, and stress will be minimized. Use oil to reduce heat. Unless your chips are coming off blue and smoking, you will be fine.
Cast will be less susceptible to distortion, but if stresses get to high, it won't warp, it will crack. You can always recut threads if distortion is an issue, but a cracked part is scrap.
Full of ideas, but slow to produce parts