pin hole damage

GRapp said:
I assume I'm chipping the material as I drill the last bit through and need to ease into it especially at the end. Anything I'm not seeing or aware of?
https://imgur.com/a/iOLRPeC
Click to expand...

is that view the bottom surface?
Underneath your drilling?

Are you drilling the pin hole, Then shaping the handle, or shaping first?
Don't do that.

If you are having blow out in your handle material, drill through the material into a wood board that's underneath the scale material. It will support the cut
 
Try using some painters tape, as you approach the end of the hole, just before you are about to break through, ease up and peck drill it. G10 likes to tear fibers and overheat a bit.

As mentioned, a wood backer also helps immensely.
 
I use a piece of wood to support the handle material. I'll tape around the backside of fragile material like mammoth. Also try to ease through the last part of the cut.
 
That looks more like what you get when you overheat the handle pins/bolts when grinding them down. If they get too hot they'll burn the G10.

Eric
 
There are drill bits designed specifically for synthetic materials, they will help.

Hoss
 
Crag the Brewer said:
is that view the bottom surface?
Underneath your drilling?

Are you drilling the pin hole, Then shaping the handle, or shaping first?
Don't do that.

If you are having blow out in your handle material, drill through the material into a wood board that's underneath the scale material. It will support the cut
Click to expand...
Probably the bottom. As I read the question I realized I should be looking closely at this and putting the bad side (if it exists) on the inside. Now I feel like a dumbazz!

Drilling first, shaping is last.
 
Make sure the flutes of your drill bit are clear and empty when arriving at the end of your cut.
As you remove material, that material needs a place to go - and that place is IN the empty flutes. If you have material in your flutes the bit just PUSHES the last bit of material FORWARD instead of removing it.
 
Is that a peened pin? Could be that you're over peening the pin or that the hole is just a little too tight before the pin was installed.
 
sharp drill bits help a lot
 
Drew Riley said:
Is that a peened pin? Could be that you're over peening the pin or that the hole is just a little too tight before the pin was installed.
Click to expand...
Not peened. I bet it was either too hot, or poorly drilled from the start. I'll correct these errors.
 
Another option could be to drill the hole undersize, and drill it to size going in from each side
 
That’s what it looks like when your bit is either dull or you get too much heat. In light colored g10s it’s very obvious, but not something you’d immediately notice in darker colors.
 
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