The BRP drawings show a 15 degree chamfer on the inside and out of the drive stud slot. I'm asking because i'd like to make the inside cut before welding so i can polish the tool marks out.
1: Does anybody have a dimension for the chamf. ?
2: What is the outside chamfer for? I have heard the inside one is for the semi spring.
15 deg dimension
Re: 15 deg dimension
Seems to be about right.
Dykem the edge and scribe a line from parting edge at .26 and .38. The .26 is a reference for the finished stud slot and 3/8 is the finish size for the 15*. Block up the inside of the shell so it doesn't jump out if needed. You could rough the stud slot now with it in the vise to reduce the load on the 15*. Conventional cut for roughing passes and a couple of .005 climb passes to smooth it. Normal rules apply, nothing in that vise is worth your fingers. 500rpm or less.
Dykem the edge and scribe a line from parting edge at .26 and .38. The .26 is a reference for the finished stud slot and 3/8 is the finish size for the 15*. Block up the inside of the shell so it doesn't jump out if needed. You could rough the stud slot now with it in the vise to reduce the load on the 15*. Conventional cut for roughing passes and a couple of .005 climb passes to smooth it. Normal rules apply, nothing in that vise is worth your fingers. 500rpm or less.
Re: 15 deg dimension
Cutter is a 15* HSS tapered mill. You might need Z thing to clear stuff inside the shell. 50/50 whether it was worth the trouble.
Re: 15 deg dimension
Better view of Z block. Note 2x 1/8 parra under moveable jaw. Use an end work stop to keep it from sliding.
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- Stabshauptmann
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Re: 15 deg dimension
Marknct, Great to see your progress. I couldn't get in the shop at the time and ended up doing the chamfers by hand with files. "took a long time". Yours look really nice. Keep posting and keep up the good work. RR