Corby bolts and Tapered Tangs

[rwn2000]

The middle knife in this pic has 3/16" thick black G10 scales over 0.030 white G10 spacers and the blade is 0.125" thick. As you can see in the pic, I forgot to account for the depth of the tapped hole in the "nut" side of the Corby and sanded through, which I filled with tinted epoxy.

The only good thing is that I put both bolts in the same direction so it looks like it is supposed to be that way.

The green knife in the next pic also has Corby bolts AND a tapered tang (0.150" at ricasso, 0.055") at the butt end.

This time I ground off some on both threaded ends of the Corby bolts and got better results (i.e, didn't sand through). But it was a lot of effort, measuring and double checking to get the Corby's to tighten. I used, CA to attach one scale, drilled the through holes, CA'd the other scale on, drilled the through holes and then drilled the countersunk part of the holes with both scales still glued to the tang so they'd be teh same depth on each side, accounting for the tapered tang using a drill bit for a shim. Is there an easier way? Note, I planned on doing 3 Corby's but just didn't think I could get the one at the thin end to work so I chickened out and used a lanyard tube.


Also, which scales look better, rounded on the brown one, or flat bevels on the green one?

thanks

randy

 

[Paul Savage]

Looks good Randy. I'm pretty sure those bolts were supposed to look that way weren't they lol . I leave .075 in the bottom of my handle holes and haven't had any problems of breaking through yet.

 

[Salem Straub]

That sounds pretty much like my process with corbys. I couldn't spend $29 bucks or more for a corby counter bore, so I made one out of a drill bit. It works well. Beats clamping and counter boring with a bigger bit.

I noticed that the common suppliers have corbys with differing properties. I hate ones with a too-deep female side, i.e. into the head. They easily grind through. The last ones that I got from Pop's were very good though, and at a buck apiece good and cheap. I checked them with a small pin, the female side is no deeper than the shoulder.

I HATE grinding through corbys. My remedy is to press-fit a slightly tapered bit of pin stock in with a speck of epoxy, if done well it's very hard to tell a mistake was made.