Deburring - What have you learned?

C

cubegleamer

Joined
Feb 3, 2011
Messages
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I just bought a deburring tool and I'm pretty disappointed with it. I have a bunch of knives that are drilled and ready to be sent off for heat treat but I can't really get the holes deburred cleanly. What do you guys use? I need a fast and simple way to get this done. The deburring tool doesn't really fit into 1/8, 5/32 or 3/16 size pin holes.
 
I've used the cheap ones from the local hardware stores and they work for a few knives before they get all chewed up. The ones I've used can deburr any size hole up to the diameter of the bit. Are you using a hand tool or chucking tool? I think cobalt is preferred for knife steels. I'm hoping for a good answer too.
 
I've always used a countersink to deburr holes. Those deburring tools are good for outside edges though.
 
For my folders, I have 3 sizes of drill bits that I just turn by hand without a glove on.
Frank
 
I use just a bigger drillbit than the hole, in the drill press. I lock the piece and slowly "caress" it with the bigger drill bit. Than i clean the piece on the granite/sandpaper.
It will work nicely with the small holes.
 
I use a Christmas tree shaped carbide burr mounted in a pin vise, works great for pin holes or a finished chamfer.
 
here are some of our machine shop deburring "tools"
you can see that a few are made up by the guy in charge of deburring

we deburr mostly inconel castings that we machine

29162470-7521-49D6-A934-7E139C2FB7E7_zps1odi4xle.jpg
 
I use a few different techniques. On fixed blades, I usually kiss the holes with a countersink on the drillpress. On larger holes or odd shaped holes, I use a deburring tool like a Noga or a Shaviv. On outside edges I will often break the edge with a Scotch-Brite wheel mounted on a bench grinder. And finally, on folder liners, backspacers and such, I will just do a quick hand lap on 400 grit paper stuck to a surface plate.

Bob
 
If you are familiar with RCBS case deburring tool, I use one similar. Mine is male end only, and has a shank on it that I mount onto the cordless drill.
 
Countersink and sandpaper. As I make mostly forged hidden tang fixed blades, absolutely clean, deburred holes have only really been important for full tang knives that i sent out for commercial heat treatment. I "debur" the edges so I don't get those little steel splinters. ;)
 
I have found that the transition steps of a step drill work pretty well for deburring/chamfering.
 
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