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#1
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Hello All,
Here is a question to the engineers amongst the forum. What do you think this brass block was made for? I visited one of the local scrap metal merchants to buy some brass. I found a 50 mm square solid brass block with the following inscribed 1.438 DIA. INV#10495 It seems like a precision made engineering gauge for measuring such things as rubber 'O' rings or seals to check to see if they are made within a specific tolerance. Well, that is my guess. How close to the mark am I? Kind regards Lionel
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1940 Chevrolet MCP with Holden Built Cab (30 CWT). 1935 REO Speed Wagon. 1963 Series 2A Army Ambulance ARN 112-211 Series III ex-Military Land Rovers x 2 |
#2
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Hi Lionel
Yep it appears to be a gauge but the actual use is uncertain. Your guess would be pretty close. It looks to be rather worn and in rough condition, not what I would describe as being high precision. Brass comes in various grades with different % of elements in the alloy, some types are harder.
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad Last edited by Mike Kelly; 01-12-23 at 12:20. |
#3
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I am glad that you consider the block to be in rough condition. I bought the brass block to use with plug welding rust holes in automotive sheet metal. Am I right in thinking that either brass or copper could be used as a backing when welding up rust holes in sheet metal? I just had a look online and there are some brands of plug welding pliers that feature a copper-plate top jaw. Of the two options copper or brass - which one is the best option for carrying out plug welds in sheetmetal? Or the two equal to the job? Kind regards Lionel
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1940 Chevrolet MCP with Holden Built Cab (30 CWT). 1935 REO Speed Wagon. 1963 Series 2A Army Ambulance ARN 112-211 Series III ex-Military Land Rovers x 2 |
#4
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I've always heard of the backing plate for welding as copper rather than brass but hat doesn't mean brass might not be as good - just never tried it.
The gauge block looks to me as if the round end might have been a cylinder shape that has been cut off at some time - just guessing though. |
#5
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Brass has a high % of Zinc which means it might make welding difficult. Always handy to have a block of brass so I am sure you can still put it to good use. Maybe buy a lathe and machine it down into something you need i.e. shims.
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1940 cab 11 C8 1940 Morris-Commercial PU 1941 Morris-Commercial CS8 1940 Chev. 15cwt GS Van ( Aust.) 1942-45 Jeep salad Last edited by Mike Kelly; 02-12-23 at 03:07. |
#6
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You are correct. I just had a yarn with a boilermaker and either copper or aluminium is the drum. Copper being the first preference. Not brass as it does impede welding. Oh well, I now have a very effective paperweight and a curio. Kind regards Lionel
__________________
1940 Chevrolet MCP with Holden Built Cab (30 CWT). 1935 REO Speed Wagon. 1963 Series 2A Army Ambulance ARN 112-211 Series III ex-Military Land Rovers x 2 |
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