Today's Message Index:
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1. 04:43 AM - Arplast PV50 Gear Shims (BobD)
2. 12:56 PM - Re: Arplast PV50 Gear Shims (rparigoris)
Message 1
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| Subject: | Arplast PV50 Gear Shims |
The shims in the gearbox of my Arplast PV50 Propeller have been chewed up by the
gears, resulting in jammed gears. Does anyone have either a full gearbox, or
the shims from a gearbox, or know where they can be sourced from ?
I have found a supplier of shims on E-Bay, but not one that can supply the exact
size of the shims, which from measuring appear to be both 0.1mm x id 6mm x od
15mm, and 0.1mm x id 7mm x od 15mm.
The nearest match I can find are 6 x 12, 7 x 13, or 9 x 15
TIA
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Bob Dawson
Europa XS TG || 912 ULS || G-NHRJ || Dynon Skyview || PilotAware || SmartAss3
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Message 2
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| Subject: | Re: Arplast PV50 Gear Shims |
Hi Bob Good luck, hope you can find what you need. If not a few ideas: see if McMaster sells them: https://www.mcmaster.com/shims/ I'm not sure what your shims are made out of but McMaster sells shim stock or procure some. Early on I used to make Cox .020 and .049 model cylinder head gaskets out of the bottom of soda cans. If your shims are aluminium measure, it may be the right size. Advantage of can is the thickness varies a bit and middle is thicker. I have used a divider to cut, simple compass where I drilled a dowel and stuck in a drill bit and sharpened. Rapid Epoxy helps to stabilize poor tools.I have cut stainless, steel brass aluminium and copper shims like this. You may need to secure shim to flat object like aluminium, brass, plastic, wood etc. Sometimes I use double sticky tape, sometimesa turned rod with hole in center and screw it in place. Small screws or nails is OK too. As far as cutters I have used TIG Tungsten electrodes, high speed drill bits, cobalt drill bits and carbide. Since I have a lathe now a days, if it's one off may just turn a piece with OD and ID taking into consideration the cutter size. Then turn one side the ID and the other the OD and drill a center hole. Let's say we drill center hole 3/16". So you take shim stock and punch 3/16" hole in it. Now screw the OD side and make your cut. Then turn around and cut ID. You're not going to be able to turn out 20 parts per minute, but it does work if you take your time. Depending how well the part is cooperating, sometimes cutting 1/4 the way or so and flipping over keeps the burr down. Good luck. Ron P. BTW, McMaster doesn't have many sizes, but they sell peel away shims that can make precision shimming a pleasure: https://www.mcmaster.com/shims/peel-away-layered-ring-shims/
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