Reducing Correcting Collet Run Out on a VR300 Snap-On Valve Grinder Inspection and Spindle Rebuild
In this video I show the snap on Vr-300 valve grinder and seat grinder that was so kindly donated to the channel. I go thru replacing the spindle bearings that were locked up but I got free that were making all kinds of noise. After fixing that I turned my attention to reducing the run out in the collet chuck that holds the valves. I found online the original spec for this machine was sub 0.001" but I wanted it better than that. A half a day of inspecting and selective sanding with emory cloth got the repeatable run out down to about 0.0005" Next up I need to see what I can do about tightening up the bushings that hold the collet spindle as if it is flopping around the total run out will still be trash. Follow along as I bring this probably 50year old piece of equipment back to life!
About SEAT
SEAT S.A. (English: ; Spanish: [ˈseat]; from Spanish Sociedad Española de Automóviles de Turismo, lit. 'Spanish Passenger Car Company') is a Spanish car manufacturer that sells its vehicles under the SEAT and Cupra brands. Founded on 9 May 1950, it was created as a joint venture between Spain's government-owned Instituto Nacional de Industria, which held a majority stake, Spanish private banks, and Fiat. After being listed as an independent automaker for 36 years, the Spanish government sold SEA...
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