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Lapidary / Gemstone Community Forum
January 20, 2019, 04:01:21 am
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Reconfiguring the Grinder/Polisher

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Author Topic: Reconfiguring the Grinder/Polisher  (Read 418 times)
mirkaba
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« on: November 23, 2010, 06:09:28 am »

Got my new 80 Grit wheel last week. Couldn't wait to break it in and knocked out about 20 cabs in record time. I usually mark and cut the bezels/girdles in right off the bat but this time I got carried away and did not mark them. What a pain eyeballing them in then going back to straighten them all out! Anyway last winter I noticed a slight tick in the left side bearing and it has been slowly developing a small but irritating vibration. The heavy wheels are not affected much but the lighter expandos and end laps are getting hard to live with so I ordered new bearings. Both bearings have obviously dried out some and there is residue of grease on the left hand vibration isolator. I have put the 80 and an unused 220 I had on the center of the shaft. On the right goes an 8" expando and domed leather polishing pad (Tin Oxide) end lap. I remove the pad when not in use. The left hand side is my option side. I have 150 and 400  8" hard diamond wheels, a 6" expando with Silicon Oxide and diamond belts and another 8" expando which is on most of the time. The left hand end lap is my velcro lap where I use diamond pads for doing backs, flats, geodes and stuff. I have added a velcro on leather polishing pad (Cerium Oxide) and a 60 grit diamond pad. I will see how the 80 and 220 wheels work out for my main shaping. So far it seems to beat the heck out of the 150 and 400 combo...............Waiting patiently for the bearings to get here dancer5

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Bob

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jim
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« Reply #1 on: November 23, 2010, 06:18:37 am »

We had to change out the bearings on all the Genies at our club a while back. I didn't know it but the bearings are a common size. Would you believe that we actually picked some up at the local auto parts house? You might think about this . I'd hate to think you ordered bearings that you could have had in hand alot cheaper and faster. All you'd need to do is take an old bearing with you to compare with.
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Taogem
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« Reply #2 on: November 23, 2010, 07:21:10 pm »

I will see how the 80 and 220 wheels work out for my main shaping. So far it seems to beat the heck out of the 150 and 400 combo

Should be like the difference between night and day for you Bob..  yes
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mirkaba
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« Reply #3 on: November 23, 2010, 09:14:18 pm »

The bearings are a common size. 1" x 52 mm x 15 mm. Never heard of a bearing being measured in both inches and mms before. George it wasn't too long ago I was still using silicon carbide wheels..................Night and day for sure headspin2
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Bob

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