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Lapidary / Gemstone Community Forum
May 25, 2013, 09:19:30 am
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1  Stone Talk / Rough on the bench and slabs off the saw (general minerals board) / Re: Working with zebra stone on: May 08, 2012, 05:18:24 am
Hi BATwOMaN,

didn't realise that Shalini had posted a pic of that tree on the net, here it is:

http://www.jewellery-by-shalini.blogspot.co.uk/2012/04/bespoke-wire-sculpture-tree-by-dave.html

Enjoy your hanging around in the Bat cave!

Cheers

Dave
2  Stone Talk / Rough on the bench and slabs off the saw (general minerals board) / Re: Yard Rock ID? on: May 08, 2012, 05:12:51 am
Hi lovely rock, although I have no idea what it might be but it should come up great please share pics of the finished article. I love finding lumps of rock where ever I go and actually get more enjoyment out of working with them than I do from the semi precious rocks, have fun

Cheers

Dave
3  Stone Talk / Rough on the bench and slabs off the saw (general minerals board) / Re: Working with zebra stone on: May 08, 2012, 05:10:18 am
Hey,

thanks for sharing that picture, as I said I had never heard of it before it dropped through the letter box, and as you have shown there is so much variation and yes we are actively looking for more now. From most things I have read it seems that most people only attain a dull buff finish, but I honestly believe that with enough layers of wax you should be able to get those beauties gleaming like a mirror, think about it, after the initial layer of wax you will be polishing the wax layers after that and not the stone, just like you would with a chunk of Mahogony when french polishing, I may be wrong but I do think it would work.

3rdRockFromTheFun thanks for your comments, I guess this took our craft of Lapidary right back to basics. I was just extremely wary because it wasn't my stone it was the clients, so yes as you say I winged it and it paid off

Cheers

Dave
4  Stone Talk / Rough on the bench and slabs off the saw (general minerals board) / Re: Working with zebra stone on: May 07, 2012, 03:58:06 pm
Hi Fullerton ,

thanks for taking a peek and you comments, after reading around I wasn't that sure what to use to finish it off, so I just read the instructions on lots of different types of polish in the local hardware shop, and this particular one said to leave for 4 hours before buffing, so I thought that it must create some sort of seal, so that's the logic I went with. The polish I used is called Liberon beeswax, the other thing that swayed me was that it states on the tin "safe for use on toys". If I do get to work with this Zebra Stone again, I will try it with water on the wheels to see how it goes, I was just afraid it might end up like a sponge.

And hey BATwOMaN, we are still around just keeping busy trying to earn our daily bread like everyone else these days but haven't spent as much time in the workshop as we would have liked so far this year but we have had some commissions which is good, one was for a three foot high wire tree sculpture which went to a church in Scotland so they can hang prayers on it, it was requested by a young Mum and Dad who lost there young son last year, it was a big job with almost 2 kilometers of wire in it.

Cheers

Dave
5  Stone Talk / Rough on the bench and slabs off the saw (general minerals board) / Re: Working with zebra stone on: May 07, 2012, 05:48:10 am
Hi,

have just made a quick post on how I ended up working this Zebra stone, hope it helps someone

http://www.roughrocks.co.uk/2012/05/07/zebra-stone-how-i-worked-it/

Gotta run

Cheers

Dave
6  Stone Talk / Rough on the bench and slabs off the saw (general minerals board) / Re: Working with zebra stone on: May 05, 2012, 04:04:35 pm
Hi All,

well I messed about with a small bit, worked it with "dry" sic paper, 240, 600 and 1200, had one edge shaped a sanded in a very short time, I then used a bees wax on the finished edge and it's looking pretty good.

Then I drilled it big enough for two pieces of leather thing to pass through, again no problems.

Next I went to work on the larger chunk, this was around 20mm thick and about 100mm long and 60 mm wide, I cut it down the middle with a hacksaw, just took it easy and it cut fine, then I marked out a couple of pendants shapes and cut them roughly with the hacksaw and then got rid of the rest with a small diamond disc on my drill, now I have to drill the holes for the leather thong and finish shaping with sic paper and then beeswax it and job done.

I was really wary when I started working on this stone, but it has given me the confidence to have a go a lump of amber I have had lying around for a few years now.

Once the job is finished I will post a few pics and thanks to all who have offered advice

cheers

Dave
7  Stone Talk / Rough on the bench and slabs off the saw (general minerals board) / Re: Working with zebra stone on: May 03, 2012, 12:39:16 am
Hi Guys,

thanks for your thoughts and advice, I am going to give it a go this morning and will report back

Cheers

Dave
8  Stone Talk / Rough on the bench and slabs off the saw (general minerals board) / Working with zebra stone on: May 02, 2012, 03:06:31 am
Hi Guys,

just been given a lump of zebra stone to slice and then shape into two pendants and a set of earrings.

I have never worked with this stone before and it seems a bit soft, in that if I scrape my nail over it it's a bit like chalk which is a worry.

My saw uses "metrprep" for cooling which I understand is mineral oil based, my concern here is that the stone will absorb the coolant, same with the wheels they are water cooled so again will the stone absorb the water and finally if I use the diamond on will the oil in the diamond paste be absorbed, sorry about all the questions but would like to be sure before I proceed

Thanks in advance for any advice

Cheers

Dave
9  Lapidary Shop / Miscellaneous Shop Talk / Re: Stretched belts on expanding drums on: August 16, 2011, 02:03:32 am
Hi Fellers,

thanks for your replies, I have double checked the drums are fitted correctly and they are running at about 1500 rpm, so could look at speeding them up a bit, but the trouble is they start to wander when I switch the machine on.

I will try putting some old well used sic belts underneath the rez belts first to see if that does the job, but they are really stretched so not holding too much hope on that idea.

I guess the material they are made from just stretches more than that used for sic belts, the one I have are Raytech and I have also seen some  called crystalbelts ( http://www.sfjssantafe.com/items.php?Gid=488&ItemSet=Lapidary&DepId= ), anyone used these at all and do they stretch quickly?

Will let you all know how I get on.

Cheers

Dave
10  Lapidary Shop / Miscellaneous Shop Talk / Stretched belts on expanding drums on: August 15, 2011, 01:28:05 am
Morning all,

as you may be aware I use Rez belts on 8" expanding drums (resin impregnated belts for use with diamond paste).

They are now starting to stretch so much so that they wander off the drum and I was wondering if anyone else has had this problem and if they found a way of securing the belt to the drum or is just time to change the belts.

Thanks in advance

Dave
11  Lapidary Shop / Cabbing And Grooving Machines.. Projects / New and Used Reviews / Re: Polisher on: July 09, 2011, 03:38:13 pm
Roy,

it's brilliant. love to see stuff that made out of stuff thats all put together to make a working machine, I am sure you will get more satisfaction out of this than any ready built machine from a shop.

Cheers

Dave
12  Lapidary Shop / Cabbing And Grooving Machines.. Projects / New and Used Reviews / Re: A 4 wheel expanding drum machine on: July 04, 2011, 03:38:03 pm
Hi TOG,

in case it helps, the motor has the name AmTecs on the information plate and I tracked down their web site, it's below:

http://www.amtecs.co.uk

Happy hunting

Cheers

Dave
13  Lapidary Shop / Cabbing And Grooving Machines.. Projects / New and Used Reviews / Re: A 4 wheel expanding drum machine on: July 04, 2011, 01:42:33 am
ScarlettOSara,

Shalini has just come with a much better name "The Diamond Geyser" like that :-)
14  Lapidary Shop / Cabbing And Grooving Machines.. Projects / New and Used Reviews / Re: A 4 wheel expanding drum machine on: July 04, 2011, 01:17:08 am

Dave, tell me about the motor, type manufacturer, hp, etc., whats the black box on top?  questions, questions, questions.

tks

TOG

Hi TOG,

the motor is a single phase induction motor, continuous duty type. It's 240v 50HZ and runs at 1380 RPM with an output of 0.25kw or 0.33 hp, the black box on top is  where all the electrical connections are made plus it houses the two capacitors (start and run) as well.

I bought this from the UK, but am sure you could find something similar over in the USA, as it was explained to me by the shop I got it from, most motors are chinese these days, some are exceptional some are rubbish, but as this is third motor I have had from this guy I am convinced he knows his stuff and won't sell me rubbish. We have run these motors for in excess of 5 hours at a strech and they have never faltered or overheated so we are happy with them.

Here is a direct link to the motor:

http://www.electricmotorstogo.co.uk/products/19-025kw-4-pole-sp-ccb3.aspx

Cheers

Dave
15  Lapidary Shop / Cabbing And Grooving Machines.. Projects / New and Used Reviews / Re: A 4 wheel expanding drum machine on: July 04, 2011, 01:03:29 am
Hi ScarlettOSara,

thanks for your comments and yes it does do a sterling job for us, as for a name for the machine "The Finishing Touch" sound  

Now we have lots of dopping to do and then we can get the rest of the cabs up to scratch. It like I said a while ago, the diamond paste was the only way I could get a deep shine on Lapis and at that time we only had, at that time we only had the 28 amd 0.5 mesh in play, now we have the other two as well so good result are anticipated!

Cheers

Dave
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