pic: 3 cim shifting gearbox from 2471

[thinker&planner]

Pretty nice.
Out of curiosity, did you waterjet the bearing holes and bolt holes in addition to the lightening pattens?
This past year, we only waterjetted the lightening patterns and outer profile, and then did all the mounting holes and bearing holes by hand with a mill (DRO!)

[akoscielski3]

Originally Posted by thinker&planner

Pretty nice.
Out of curiosity, did you waterjet the bearing holes and bolt holes in addition to the lightening pattens?
This past year, we only waterjetted the lightening patterns and outer profile, and then did all the mounting holes and bearing holes by hand with a mill (DRO!)

Did you cut smaller holes on the waterjet and then drill them with the proper drill size on the mill? or did you leave that section blank and then drill the holes?

If you water jet the holes to a smaller size then drilled them out with the proper size you could save time. You should do that on a drill press though so the drill bit goes into the center of the hole by itself. That's what I would do at least.

[thinker&planner]

Originally Posted by akoscielski3

Did you cut smaller holes on the waterjet and then drill them with the proper drill size on the mill? or did you leave that section blank and then drill the holes?

If you water jet the holes to a smaller size then drilled them out with the proper size you could save time. You should do that on a drill press though so the drill bit goes into the center of the hole by itself. That's what I would do at least.

For the #10 clearance holes, we left that section blank. For the bearing holes, we cut out like a 1" diameter hole so that we didn't have to center-cut with the bearing endmill.

I thought about making a center "pilot hole" for all of the bolt clearances, and I can't remember why we didn't do it. We certainly will in the future.

[MichaelBick]

Originally Posted by akoscielski3

If you water jet the holes to a smaller size then drilled them out with the proper size you could save time. You should do that on a drill press though so the drill bit goes into the center of the hole by itself. That's what I would do at least.

We haven't had issues with just water-jetting the screw holes to the final size

[akoscielski3]

Originally Posted by MichaelBick

We haven't had issues with just water-jetting the screw holes to the final size

True, that should also just be water-jet cut. Bolt holes can be terrible.