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P&W 1830 Radial in 1/6 scale.
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02-20-2013, 06:43 PM
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" 
02-20-2013, 06:53 PM
02-20-2013, 07:18 PM
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" 
02-20-2013, 08:00 PM
Real nice Bill!
sasquatch, proud to be a member of MetalworkingFun since Jul 2012.
02-20-2013, 09:31 PM
Thank you. These are the five parts that make up the crank. I have to fabricate the crank cheeks now.
"Billy G"
02-20-2013, 10:05 PM
Great work Bill.
 Jerry 
ETC57, proud to be a member of MetalworkingFun Forum since Feb 2012.
02-21-2013, 11:04 AM
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"
02-21-2013, 01:33 PM
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" |
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Almost done. Gear is finished
