- Joined
- Jun 26, 2018
- Messages
- 1,733
When designing it, I figured the 1st op was to turn the back , then drill/tap the center.Sooooo maaaanyyy setups…..EVERY DAMN TIME…. Shimming against that damn 1* of tilt. ARRRGGGHH! Took like an hour to do 2 plates, 3/4” flat.
3 setups EACH on the lathe, one EACH on the CNC MILL, 1 setup EACH on the manual mill. Was there an easier way? I dunno.
View attachment 371274
I thought about so many things…. Again, in my head, this whole agenda was to make us get off our butts and do things we may not do. It’s obvious not everyone is on board for that same agenda…but I’m sending my parts to you with good warning…I’m not a professional and this was a bit of a stretch for me. I had to work constantly compensating for “error”, which was new. I have no sine bar so I had to figure out how to do this without that. I pushed myself for tighter tolerances (understanding some were a must) it was fun, but hopefully we’ll all discuss the final product rather than just being done when we get our broach.When designing it, I figured the 1st op was to turn the back , then drill/tap the center.
Then, op2 is on the mill to cut the flats.
Op3 is to flip it over and put it on a sine bar in the mill vise, mill the front face, then drill the 4 holes with the DRO. The only "trick" there is figuring out how to find the "center", but I'm reasonably convinced an edge finder would have done the job.
Yeah, I was hoping to make the best possible cutters I could, since they are so expensive otherwise. I'm a bit curious how I'm going to make this happen now though...HSS M2 sounds like a tough choice. I made my broaches out of O1. Then again, I would not trust them to last long on harder alloys. And- resharpening broaches is problematic since it reduces the OD of the cutting edge no matter how you do it.
Guns-nice looking surface finish on those parts.
Robert
Yeah, they are .500". I HAVE the material (and cut to rough size!), but I just have to figure out how to cut them on the lathe.. I seem to see that I could get some types of inserts that will cut it with little problem, but I haven't been able to make heads/tails about them. I guess worst-case I can try to make the dish on the grinder in some way...Yeah, that's rough. What's the answer? Whatever Robert was talking about?? I have two 12mm x 100mm round bars of HSS...but I believe you were using .500" diameter? Poop on a doorstep......