.217 id sealed bearings wanted

mitchg95 Sat Dec 29, 2012 6:55 pm

does anyone know where i can get sealed bearings that have an inside diameter of .217''? thanks

Jason_WI Sat Dec 29, 2012 8:54 pm

I think you will have to grind the cranks down to 5mm or .1968 inches.

mitchg95 Sat Dec 29, 2012 8:55 pm

Jason_WI wrote:I think you will have to grind the cranks down to 5mm or .1968 inches.

would it be possible to turn them down?

Jason_WI Sat Dec 29, 2012 10:12 pm

Turn them down with carbide tooling then finish grind to size with a tool post grinder.

mitchg95 Sat Dec 29, 2012 11:28 pm

Jason_WI wrote:Turn them down with carbide tooling then finish grind to size with a tool post grinder.

i mean, how do i hold the work in the collet, i can hold it by the first raised section before the knurl, but how would i hold the crankshaft when i want to turn down the rear thickest part of the shaft?

pkrankow Sun Dec 30, 2012 9:07 am

I would use my 4-jaw to hold the crank end, and a live center on the prop end. Then it is about 30 minutes of fiddle faddle with an indicator to get it centered. If I did this more often than next to never it probably would be quicker.

I would use my angle grinder on a tool post and take very light cuts to dimension. I don't have carbide tooling.

Yea, there ain't much space and such between the headstock and tailstock to do this, even less with the grinder taking up space. I have an old Atlas 10F without a whole lot of tooling.

Phil