Chamfer questions

[Froe]

If I could bother you for info, I’d like to ask a couple of questions about pivot pin chamfering.
1. How much and with what tool do you chamfer the bolsters when re-pinning the pivot? I’ve done just a handful of repairs and one re-scale. I’ve been using a small hand reamer with an acute point and just following my gut as to how much. So far it’s working okay but I want to be more confident that my work is reliable.
2. When re-pinning the pivot on shadow bolsters what are you doing differently on chamfering than you do on nickel silver bolsters? I’m concerned about excessive pressure on the scales at the pivot causing a crack but I still want the blades secure. I’m thinking I’d epoxy the scales prior to pinning to provide support but what else can I do?
Thanks in advance for your input.
Froe

[Reverand]

I got a set of diamond-coated bits for the Dremel. I use either a cone bit or a ball burr.
For handle/pivot pin, you only need about 10 to 15 thousandth over. I might make the chamfer a bit bigger on the pivot pins.

[Froe]

I got a set of diamond-coated bits for the Dremel. I use either a cone bit or a ball burr.
For handle/pivot pin, you only need about 10 to 15 thousandth over. I might make the chamfer a bit bigger on the pivot pins.

Thanks for replying Rev.
That’s not a lot of cutting . Do you actually power cut the chamfer or do you chuck the bit into a tap handle or similar tool and manually work the chamfer?

[OLDE CUTLER]

I got a set of diamond-coated bits for the Dremel. I use either a cone bit or a ball burr.
For handle/pivot pin, you only need about 10 to 15 thousandth over. I might make the chamfer a bit bigger on the pivot pins.

Thanks for replying Rev.
That’s not a lot of cutting . Do you actually power cut the chamfer or do you chuck the bit into a tap handle or similar tool and manually work the chamfer?

My tool for this. The bit is a tapered Dremel reamer turned by hand, a file handle with a bolt with the head cut off and a spare drill chuck. If you try to power cut and the bit chatters, you have ruined the knife.

[Froe]

My tool for this. The bit is a tapered Dremel reamer turned by hand, a file handle with a bolt with the head cut off and a spare drill chuck. If you try to power cut and the bit chatters, you have ruined the knife.

Thanks OC. So are you taking the chamfer cut shallow just around 1/64” deep or are you keeping it narrow but deeper? I really like that reamer tool, that’s clever. I think I have the parts for that.
Thanks for the info.
Froe

[Reverand]

I got a set of diamond-coated bits for the Dremel. I use either a cone bit or a ball burr.
For handle/pivot pin, you only need about 10 to 15 thousandth over. I might make the chamfer a bit bigger on the pivot pins.

Thanks for replying Rev.
That’s not a lot of cutting . Do you actually power cut the chamfer or do you chuck the bit into a tap handle or similar tool and manually work the chamfer?

I either use it in a Dremel on slow speed, or I have a $4 Amazon bead reamer that I use by hand. Both are diamond coated, which cuts slower, so either one works fine.

[Froe]

I either use it in a Dremel on slow speed, or I have a $4 Amazon bead reamer that I use by hand. Both are diamond coated, which cuts slower, so either one works fine.

Thanks again Rev.
I appreciate the response. I’ll check out bead reamer. Honestly, I don’t trust my hands with a dremel on such a small cut.
Froe

[OLDE CUTLER]

I try to follow the advice in Adrian Harris knife repair book. He says to countersink .010" to a depth of .015". I admit that it is a ball park, eyeball measurement.

[Froe]

I try to follow the advice in Adrian Harris knife repair book. He says to countersink .010" to a depth of .015". I admit that it is a ball park, eyeball measurement.

That’s exactly the info that I was looking for. Thanks OC. I’ll Google the book.
Thanks again
Froe

[Reverand]

I try to follow the advice in Adrian Harris knife repair book. He says to countersink .010" to a depth of .015". I admit that it is a ball park, eyeball measurement.

Great advice OC. It has been years since I read that book. I need to get it back out and brush up on it. He did put a lot of good info in it.