07-31-2015, 06:33 AM
I like those left hand spiral/right hand cut taper pin reamers. They work really well.
What I used to do before the days of computers and Google was measure the small end of the pin to be used. That was my drill diameter. Then measure the large end of the pin and lock the micrometer at that setting. Next, put the reamer within the anvils of the set micrometer and bring it to just touch. Wrap a piece of masking tape around the reamer about 1/8" (3mm) below that point.
Drill the hole and start reaming. When the reamer is in to the tape, test fit the pin. When the pin is dropping into the hole with about 1/16" above the top surface of the part I'm reaming, tap it home with a hammer. Done.
What I used to do before the days of computers and Google was measure the small end of the pin to be used. That was my drill diameter. Then measure the large end of the pin and lock the micrometer at that setting. Next, put the reamer within the anvils of the set micrometer and bring it to just touch. Wrap a piece of masking tape around the reamer about 1/8" (3mm) below that point.
Drill the hole and start reaming. When the reamer is in to the tape, test fit the pin. When the pin is dropping into the hole with about 1/16" above the top surface of the part I'm reaming, tap it home with a hammer. Done.