August 24:—SAN ANTONIO, TEXAS: Retail show; Southwest Gem and Mineral Society of San Antonio; Sat. 10-5
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 Post subject: Belt for Graves Mark IV
PostPosted: Sun Oct 28, 2018 4:33 pm 
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Joined: Thu Dec 08, 2016 1:10 am
Posts: 16
So i finally broke the black belt that drives the spindle from the motor.
I was going to get a replacement from the Graves website- but shipping is 3x the price of the belt ( @$15). Any other suggestions?


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 Post subject: Re: Belt for Graves Mark IV
PostPosted: Sun Oct 28, 2018 4:41 pm 
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Joined: Thu Mar 19, 2015 9:55 am
Posts: 511
The belt will be a stock item, take your broken belt to your local engineering supplier and ask for two the same (one as a spare so you can keep running the next time you break a belt). Also, superglue the ends of the broken belt together to keep you running whilst the replacement comes, I have done this with one of my machines and the repaired belt has lasted longer than the belt did before breakage!


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 Post subject: Re: Belt for Graves Mark IV
PostPosted: Tue Oct 30, 2018 10:40 am 
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Joined: Thu Jun 03, 2010 1:49 pm
Posts: 331
Location: South Africa
As Alan suggests, get an o-ring. Glue yours back together.

Moons ago I got fed up with the original slipping or jumping off, got a length of o-ring from a hydraulics shop and super glued it together. Problem solved.


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 Post subject: Re: Belt for Graves Mark IV
PostPosted: Tue Oct 30, 2018 11:23 am 
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Joined: Thu Mar 19, 2015 9:55 am
Posts: 511
I've never tried "O" rings, but I will now, sounds an excellent idea. If it doesn't work, the cost is almost nothing.


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 Post subject: Re: Belt for Graves Mark IV
PostPosted: Tue Oct 30, 2018 12:22 pm 
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Joined: Tue Apr 03, 2018 12:08 am
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Location: Seattle
Consider a urethane o-ring/belt. The material is sold in straight lengths which is welded together by flaming the two ends and then pushing them together until cool. The result will be a bulged joint which can then be smoothed with a stone bur or sanding drum in a Dremel. If the belt ever breaks, repairs are done the same way.

https://www.mcmaster.com/urethane-round-belts


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 Post subject: Re: Belt for Graves Mark IV
PostPosted: Mon Nov 05, 2018 2:36 pm 
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Joined: Thu Dec 08, 2016 1:10 am
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Ended up "welding" my belt together with a bic lighter, now to sand down that bur.

Thank you everyone for the suggestions.


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