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Post by oregon on May 1, 2019 16:50:53 GMT -5
20 odd years ago there was a surplus rush of these GE Mina Gear, Robbin & Myers geared electric motors from Xerox machines that folks turned into sphere machines. They're NLA. Anyway, the gear (nylon?) in the gear boxes tends to break after a while (I imagine grinding rock is a bit tougher than moving paper) . The gear looks like it was molded onto the output shaft, (two 90 degree opposing flats on the 1/2" shaft. and the gear tends to split. I'm wondering if anyone's attempted a repair or know of anyone that has.
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AzRockGeek
has rocks in the head
Member since September 2016
Posts: 704
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Post by AzRockGeek on May 1, 2019 17:02:54 GMT -5
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Post by oregon on May 1, 2019 17:11:59 GMT -5
yeah, HP I'm sure is importing them from China, be nice to find the direct link. If you meet a guy from Sedona again, let me know  But still thanks for the tip, didn't know that replacement options existed! |
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jasperfanatic
spending too much on rocks
Member since January 2019
Posts: 463
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Post by jasperfanatic on May 1, 2019 17:19:53 GMT -5
If you know someone with a 3D printer, I bet you could print a pile of them and be set for life...for next to nothing.
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Post by Rockindad on May 1, 2019 19:17:52 GMT -5
If you know someone with a 3D printer, I bet you could print a pile of them and be set for life...for next to nothing. I second this- I was just talking to a coworker last week in his office and it was filled with creations that his 16 year old son had been making on his 3D printer. Compared to some of the stuff his kid was creating I don't think a gear would be too difficult. Al |
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Post by oregon on May 1, 2019 20:45:12 GMT -5
If you know someone with a 3D printer, I bet you could print a pile of them and be set for life...for next to nothing. I second this- I was just talking to a coworker last week in his office and it was filled with creations that his 16 year old son had been making on his 3D printer. Compared to some of the stuff his kid was creating I don't think a gear would be too difficult. Al ha, yeah, have a few printers around here. Gear teeth are usually tough to print with loads and without fancy filament. The problem here is the Gear was molded onto the shaft. flats also serve to keep the gear located along the shaft it that makes sense. You can see below, the teeth are not worn the gear usually cracks (from age)? So I had already printed these spacers to force the two halves to stay together. Could bolt them but just made them tight enough for a press fit, and not keen on drilling more holes in the original. Maybe add some adhesive. Time will tell. hmm don't see the upload photo link on this page.. |
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Post by oregon on May 1, 2019 20:47:42 GMT -5
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Post by Rockindad on May 1, 2019 20:55:00 GMT -5
I second this- I was just talking to a coworker last week in his office and it was filled with creations that his 16 year old son had been making on his 3D printer. Compared to some of the stuff his kid was creating I don't think a gear would be too difficult. Al ha, yeah, have a few printers around here. Gear teeth are usually tough to print with loads and without fancy filament. The problem here is the Gear was molded onto the shaft. flats also serve to keep the gear located along the shaft it that makes sense. You can see below, the teeth are not worn the gear usually cracks (from age)? So I had already printed these spacers to force the two halves to stay together. Could bolt them but just made them tight enough for a press fit, and not keen on drilling more holes in the original. Maybe add some adhesive. Time will tell. hmm don't see the upload photo link on this page.. Gotcha, see it better now. Al |
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NRG
fully equipped rock polisher
Member since February 2018
Posts: 1,688
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Post by NRG on May 5, 2019 0:12:40 GMT -5
I found a vendor in India at $5ea. Had to buy like 10,000 or so
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spheremaking2
off to a rocking start
Member since October 2020
Posts: 1
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Post by spheremaking2 on Oct 23, 2020 15:06:55 GMT -5
I've had gears made by Al Meekins, Zephyrhills Fl. Better than the originals.
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Post by oregon on Oct 23, 2020 16:29:11 GMT -5
I've had gears made by Al Meekins, Zephyrhills Fl. Better than the originals. cost? did you get ones for the Robbin Myers motors, or the GE ones? They are different unfortunately. 3d PETG lasted a while, but not a permanent solution... |
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Post by DirtCleaner on Nov 2, 2020 9:19:31 GMT -5
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But still thanks for the tip, didn't know that replacement options existed! 
... to the New Guys from The ChatBox V.2 Crew