tips on drilling materials prone to cracking

[Spartanwarrior]

I have some old stag scales that I am worried will crack when I am drilling pin holes. is there any techniques that can reduce the risk of me cracking the scales? thanks-calvin

 

[i4Marc]

Stay away from the edges.

 

[Bill DeShivs]

Sharp bits, fast speed, and careful feed.

 

[Del Raso Knives]

And firmly hold down your work so it doesn't run up the brill bit. Some guys stick masking tape over the area the bit will exit, suppose to help.

 

[Stacy E. Apelt - Bladesmith]

Always use sharp bits when drilling brittle material.
Use the proper speed and pressure.
Use a backer board to support the break-out area.
Drill a smaller pilot hole and then drill from both sides to enlarge.