sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Jan 1, 2018 9:47:13 GMT -5
Looks like chert that I find in northern Minnesota.
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Sept 12, 2017 19:40:03 GMT -5
I have a Gy-roc vibratory tumbler, Model B (2.5 lb bowls). The motor burned out and I need to get a replacement. The label on the motor indicates a FASCO Model 71633854. Extensive searches for this came up with virtually nothing. FASCO's own cross-reference search yielded nothing. Once place did have them, offered specifically as replacement motors for this tumbler, but wanted $140 which seems like an awful lot for a 1/20 hp blower motor. Has anyone else had to source a motor for one of these? How do I find a suitable replacement? Your research is correct- the motor used for the Gy-roc model "B" is $140 from the manufacturer now. I went thru the same process and spoke w/ Lionel, the owner and SOLE proprietor of the Gy-roc line. Lionel went to order more motors for his machines, and the manufacturer insisted on a minimum order that was just undoable considering the huge investment involved. The motor was a custom motor, made specifically for the Gy-roc, and as such was discontinued after Lionel passed on placing that huge order. A substitute motor was found, but had to be modified by adding a AC plug and shortening the shaft. This modification greatly increased the cost of the motor but was his only viable option. Check 1st w/ John @ JS Gems to see if he has any, and in lieu of that, a company called Johnson Brothers stocks them @ a reduced cost (I got mine about a year or so ago, and I think it was $79.00 and worked fine, but beware their customer service- the current owners are not from these parts and hence have no clue how we 'Mericans expect to be treated in business. On a different note, have you tried your motor since your diagnosis of being "burned out"? They have thermal protection and will stop working if they get too hot. Once totally cool, many times they work again. Also consider using a couple drops of oil in the oil ports and turn the shaft by hand to work the oil in. Hope this helps. Johnson Brothers has the motor but the price is now $140. I haven't tried to get the existing motor going again. The shaft is seized so I'm not too hopeful about getting it working. It may be possible, though. I'll look at it this weekend. I like the tumbler, which I use for polishing cabochons, and hope to get it working it again.
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Sept 12, 2017 19:25:51 GMT -5
You could check with johnjsgems , he might be able to help ya out or at least point you in the right direction . This is good advice. I will contact John and see if he can help. Thanks!
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Sept 10, 2017 9:12:00 GMT -5
I have a Gy-roc vibratory tumbler, Model B (2.5 lb bowls). The motor burned out and I need to get a replacement. The label on the motor indicates a FASCO Model 71633854. Extensive searches for this came up with virtually nothing. FASCO's own cross-reference search yielded nothing. Once place did have them, offered specifically as replacement motors for this tumbler, but wanted $140 which seems like an awful lot for a 1/20 hp blower motor. Has anyone else had to source a motor for one of these? How do I find a suitable replacement?
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Aug 13, 2017 21:18:55 GMT -5
Mary Ellen is messy to cut but can make some beautiful cabs.
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Jul 27, 2017 9:22:58 GMT -5
Very nice. I really like this.
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Jun 15, 2017 14:35:01 GMT -5
Thanks to all who answered. I think the cutting has slowed, some, but it's hard to judge. I cut mostly agate and jasper. The bronze layer on the sintered wheel is still very thick so presumably not worn out. Would reversing the direction of rotation be likely to help?
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Jun 12, 2017 16:27:47 GMT -5
Guess this is maybe in wrong forum... 🤔
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Jun 9, 2017 16:19:31 GMT -5
Hi everyone:
My grinding setup is an HP model B-52. I've got an expanding drum on the left, two sintered wheels in the center section, a muslin buff on the right (which I don't use) and polishing heads can be mounted on the right end of the shaft. The two diamond wheels are 80 and 200 grit. When grinding preforms to shape I use like to use the rest that mounts across the center section. I get a consistent angle for the girdle that way.
My issue is that it takes a long time to grind a preform to shape with the 80 grit wheel. I'm considering getting a coarser wheel to either add to the center section or to put where the muslin buff is currently mounted. I'm not sure if this is going to speed things up that much, though, and with a very coarse wheel (say 30 grit) chipping seems likely to be a problem.
Before spending the money for another wheel I thought it might be helpful to learn what methods/tools are being used by others to grind preforms to their initial shape. Good trim-saw technique obviously helps since there will be less grinding to do. If anyone is willing to share their preferred method/tooling for grinding preforms I'd be grateful.
Regards,
Sam
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Jun 6, 2017 13:05:46 GMT -5
Thanks grooved = The grooves
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sammygator
off to a rocking start
Member since June 2016
Posts: 11
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Post by sammygator on Jun 6, 2017 13:03:55 GMT -5
Every vibrating lap I've seen has a grooved pan for grinding. Thanks grooved carry the grit and slurry. You could polish with a flat pan and a piece of carpet, but I don't think a flat pan would work, otherwise.
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