Author Topic: what kind of finish ?  (Read 2424 times)

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Offline GGaskill

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Re: what kind of finish ?
« Reply #30 on: October 17, 2008, 12:59:51 PM »
I can't grip it in the chuck securely without marking it.

Turn a bullnose center in the chuck and use a dog on the barrel to turn it between centers.  Make a simple clamp dog like this one.

GG
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Offline and7barton

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Re: what kind of finish ?
« Reply #31 on: October 17, 2008, 01:03:33 PM »
I can't grip it in the chuck securely without marking it.

Turn a bullnose center in the chuck and use a dog on the barrel to turn it between centers.  Make a simple clamp dog like this one.



Thanks for that info.
Richard
Founder in 1986 of Historical Artillery Corps, later changed to Historical Artillery UK.
Builder of Cannons and models for South-Western Artillery, Fort Amhurst, Coalhouse Fort and private commissions.
Technical Consultant for two episodes of Scrapheap Challenge. Ex Pyrotechnic Safety Officer at Coalhouse Fort. I go trekking and survivalist camping - build experimental tents and survival equipment - caving.

Offline GGaskill

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Re: what kind of finish ?
« Reply #32 on: October 17, 2008, 01:20:28 PM »
Actually, thinking a little more about it, do you already have a center drilled hole you were going to cover with the welded on cascable?  If so, use that, then weld on the cascable.
GG
“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”
--Winston Churchill

Offline and7barton

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Re: what kind of finish ?
« Reply #33 on: October 17, 2008, 01:24:29 PM »
Actually, thinking a little more about it, do you already have a center drilled hole you were going to cover with the welded on cascable?  If so, use that, then weld on the cascable.

The cascable hasn't been welded on yet, but there's no hole on the rear of the breech end, the barrel was bored leaving around 4 inches of solid steel behind it. but I could drill a short locating hole. Thanks for that hint.
Founder in 1986 of Historical Artillery Corps, later changed to Historical Artillery UK.
Builder of Cannons and models for South-Western Artillery, Fort Amhurst, Coalhouse Fort and private commissions.
Technical Consultant for two episodes of Scrapheap Challenge. Ex Pyrotechnic Safety Officer at Coalhouse Fort. I go trekking and survivalist camping - build experimental tents and survival equipment - caving.

Offline dominick

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Re: what kind of finish ?
« Reply #34 on: October 17, 2008, 01:48:18 PM »
I use a 4-1/2" disc sander [36 grit] while spinning the piece in the lathe to remove millscale.  Then run a belt sander with finer [120] grit paper to align the sanding grain pattern around the tube. 
I machine 'Hot Roll Steel' millscale with the lathe.  It is usually very difficult to remove by sanding.

Offline Frank46

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Re: what kind of finish ?
« Reply #35 on: October 17, 2008, 05:40:44 PM »
There is a chemical process or two part system thats sold under the name "tool black". Leaves a black oxide finish similar to that found on pin wrenches. One part is what I believe is actually the tool blackening solution and the other is the preservative. I used to get a british machinists magazine and I believe its sold by G.L.R
Distributors LTD unit C1 Geddings Road Hoddesdon Herts EN11 ONT Web Site www.glrmodelsupplies.com
Tel 01992 470098. They list it as KOOLBLACK good for steel, cast iron and iron. Simple immersion at room temp, permanent heavy duty blackening. The name of the magazine is model engineers workshop. Hope this helps. Frank

Offline and7barton

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Re: what kind of finish ?
« Reply #36 on: October 20, 2008, 08:42:28 AM »
There is a chemical process or two part system thats sold under the name "tool black". Leaves a black oxide finish similar to that found on pin wrenches. One part is what I believe is actually the tool blackening solution and the other is the preservative. I used to get a british machinists magazine and I believe its sold by G.L.R
Distributors LTD unit C1 Geddings Road Hoddesdon Herts EN11 ONT Web Site www.glrmodelsupplies.com
Tel 01992 470098. They list it as KOOLBLACK good for steel, cast iron and iron. Simple immersion at room temp, permanent heavy duty blackening. The name of the magazine is model engineers workshop. Hope this helps. Frank

I know the store....a really marvellous aladdin's cave of stuff.
I've bought stuff off them before.
Founder in 1986 of Historical Artillery Corps, later changed to Historical Artillery UK.
Builder of Cannons and models for South-Western Artillery, Fort Amhurst, Coalhouse Fort and private commissions.
Technical Consultant for two episodes of Scrapheap Challenge. Ex Pyrotechnic Safety Officer at Coalhouse Fort. I go trekking and survivalist camping - build experimental tents and survival equipment - caving.