5MM Bock vs 6MM Bock

[LL Woodworks]

I have made several custom FP using only the Bock 5mm feed and nib. I currently use M9 x 0.75 threads of the section. This doesn't leave much material after running a .252" reamer. What section thread spec would be best to use with the Bock 6mm feed? M10? I don't think there would be enough material staying with M9 x 0.75.

I appreciate the feedback.

 

[mredburn]

your tenon would be only 8.25 minor diameter. minus 7.9 major diameter(bock) gives you .35mm between threads divided in half. So no it wont work. I use 10 x.5 for mine but I'm working in metal. 9.5 -7.9 = 1.6mm divided in half or .8mm or about .032 wall thickness.

 

[BRobbins629]

I use a 10x1mm all the time for the #6nibs, 9x1 for the #5. Works for me in most materials

 

[LL Woodworks]

Thanks Mike and Bruce - Very helpful and I appreciate you taking the time to respond.

 

[watch_art]

I like 10x.75 or about 36tpi - finer threads seem to cut easier into materials like PR - especially if you get some brittle PR.