P&W 1830 Radial in 1/6 scale.

[Bill Gruby]

Took a crash (pun intended) on windows 8. This is complicated. OK let's try the picture thing. This is the set-up for cutting the oil pump drive gear as an integral part of the front crankshaft.

"Billy G"

[Bill Gruby]

It works. Almost done. Gear is finished

"Billy G"

[EdK]

(02-20-2013, 06:45 PM)Bill Gruby Wrote: It works. Almost done. Gear is finished

"Billy G"

Nice Bill!

I like your quality control group all ready and waiting. It's good to have dependable helpers.

Ed

[Bill Gruby]

Those two know when the camera comes out. It was a rough haul Ed. That is 316 SS. It took the cutter out twice.

"Billy G"

[sasquatch]

Real nice Bill!

[Bill Gruby]

Thank you. These are the five parts that make up the crank. I have to fabricate the crank cheeks now.

"Billy G"

[ETC57]

Great work Bill.
Jerry

[Bill Gruby]

Prints called for the bearing sleeved to be pressed on and held with Loctite. That didn't sit right with me. This engine will turn 9500RPM at the high end. I went old school again. I cut the sleeves .004 undersize on the bore. I cut the shafts to print. Into the oven at 400 degrees went the sleeves. and into the freezer went the shafts. Two hours later they went together with a light tap. Once they cooled they are one. If you are looking to see where the sleeves are, look between the square end and the gears.

"Billy G"

[Bill Gruby]

If there is one thing I have learned over the years I have been building and repairing small engines is that you have to be prepared to stop an make a special holding fixture at any time.

The center main bearing shaft needs to be square on both ends. It is only 1.5 inches long. I made this holder to hold if fast in the vise. Just cut and turn till both sides are .375X.375.

"Billy G"

[DaveH]

Billy,
Very nice job on the little gears
Looking good

DaveH