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bgold · 06-27-2008, 09:12 AM

I have a piece of wood on the back so the prop won't break out and I clamp the jig, prop, & wood to the table. as I drill each hole I put a drill the same size I'm using through the jig and hole upside down. The shank of the drill will be the size of the hole you just drilled, most of the time the bolts are smaller than the hole and some movement could happen. When I finish drilling the prop I remove the jig and then re-drill the holes with a drill about about 3 or 4 number sizes larger, usually about .012" -.015". I then hit each side with a countersink to make about a 1/32 champer to finish the holes.

06-27-2008, 09:12 AM	#6
bgold Bad-ass Super Contributer! Join Date: Apr 2007 Location: United States, AZ, Sun City Posts: 1,201	Re: Prop drilling techniques??? I have a piece of wood on the back so the prop won't break out and I clamp the jig, prop, & wood to the table. as I drill each hole I put a drill the same size I'm using through the jig and hole upside down. The shank of the drill will be the size of the hole you just drilled, most of the time the bolts are smaller than the hole and some movement could happen. When I finish drilling the prop I remove the jig and then re-drill the holes with a drill about about 3 or 4 number sizes larger, usually about .012" -.015". I then hit each side with a countersink to make about a 1/32 champer to finish the holes.