Hey y'all, I'd like to get some advice here. This is a cylinder head off a 2 stroke motor. It HAD a hemi combustion chamber with no squish band (this is from a antique motorcycle) So I desire to up the compression ratio, like on one of my other 2 stroke racing bikes of the same vintage. So I welded the combustion chamber up. let it cool, put in in a fixture (seen in pics, thick rectangular chunk of billet aluminum.) I put this fixture on my Bridgeport on a rotary table, cut the center with a large counter bore, followed on the bottom edge with a ball mill, then did a light face cut with the rotary table. I made sure the face cut protuded out just shy of teh o.d. I really want.
Now I need to machine a 12º cut on the top edge of this weld, from the beginning of 2.425" o.d. inward. This creates a squish band, then I can do the final i.d. of the band for a width of .4375", then polish every thing out.
My question is , what would be the easiest way to cut this 12º angle? in the mill with a rotary table or in my lathe? I have never done wither one of these, but I have to now !!! The block is pretty good size. About 8x10 I guess. My lathe is a 12x36 with a 6" 3 jaw and a 8" 4 jaw
The machined circle here is slightly less than the 2.425".
I need to start my 12º cut basically where the machining starts on this part and go inwards towards the center of the chamber. Whatcha think?
Thanks,
Mutt
Now I need to machine a 12º cut on the top edge of this weld, from the beginning of 2.425" o.d. inward. This creates a squish band, then I can do the final i.d. of the band for a width of .4375", then polish every thing out.
My question is , what would be the easiest way to cut this 12º angle? in the mill with a rotary table or in my lathe? I have never done wither one of these, but I have to now !!! The block is pretty good size. About 8x10 I guess. My lathe is a 12x36 with a 6" 3 jaw and a 8" 4 jaw
The machined circle here is slightly less than the 2.425".
I need to start my 12º cut basically where the machining starts on this part and go inwards towards the center of the chamber. Whatcha think?
Thanks,
Mutt