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Author Topic: Gemmasta Gem Grinder  (Read 4169 times)

Dihusky

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Re: Gemmasta Gem Grinder
« Reply #15 on: July 26, 2019, 05:01:12 PM »
CSSDOP, great to hear from you, and yes I would love to get some more information on these machines. I have managed to work out a bit but to see or even possess a copy of a manual would be awesome.

I have been able to discover that there are several different models of cam profiles, I only have #4, none of the others, I do have the skills to make them though if I can discover the patterns. The items I am at a loss about are the rotating cams that mount on the end of the drive shaft, how they engage I can see, but their shape I know nothing about, let alone how they work in with the operation of the machine. I am assuming part of the cyclic drive system has to be disengaged.

So any information would be of immense value, thank you.

Dihusky

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Re: Gemmasta Gem Grinder
« Reply #16 on: March 18, 2021, 05:33:51 PM »
Looking at the date of the last post makes one realise how long this has taken! In-between a few renovations and faceting for clients I've finally finished the rebuild. During the process I came to really understand the machine and the genius who designed it. It is a remarkable piece of old school engineering and beautifully crafted without the use of the modern cad machines.

I made a couple of simple little modifications, like a plug and socket for connecting the speed control foot pedal and a better water system than the old bent copper pipe. So from a grubby partially seized "what is it??" when I first saw it in the back of a garage surrounded by buckets of boulder opal, it is now a fully functioning cab cutter. Everything has been done, sandblasting, epoxy paint, re-plating, bearings, seals, the lot and a lot of hours.

All there is to be done now it to find someone to buy it as I don't think I'll have the use for it so it will spend a lot of time sitting under a dust sheet, which would be a real shame.






Prooz

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Re: Gemmasta Gem Grinder
« Reply #17 on: March 18, 2021, 06:17:11 PM »
I remember when you got it. well done. But you would have to learn how to drive it  beers

Dihusky

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Re: Gemmasta Gem Grinder
« Reply #18 on: March 18, 2021, 10:05:36 PM »
No mate, driving it is very simple and straight forward, just dop up a piece of rock, start her rolling and you'll have a roughed cab in no time.

MakkyBrown

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Re: Gemmasta Gem Grinder
« Reply #19 on: March 18, 2021, 10:22:57 PM »
Looks awesome  ;D I'd love to see it going.

Faceting Frank

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Re: Gemmasta Gem Grinder
« Reply #20 on: March 19, 2021, 04:55:42 PM »
Solid as a rock, love the old 1/4hp motor.

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