AboutDave Expertise machine tool setup and operation,selection and use of cutting tools, welding and metalfabrication methods, machining of plastics and metals,cad/cam,cnc,workholding and all related questions regarding metalworking and finishing
Experience over 25 years experience as a class a machinist in both job shop and r&d
environments.
Question Why is the sequence of drilling, boring and reaming a hole is more accurate than just drilling and reaming it
Answer Boring makes the hole round and puts it in a precise location.
If I have very accurate holes to make I will not ream. I will spot drill, drill about .010 to .015 less than my finish diameter. Then finish the hole by boring it. I can hold a very tight tolerance and control the surface that way.
