alan
starting to spend too much on rocks
Member since December 2013
Posts: 111
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Post by alan on Jan 7, 2015 15:48:28 GMT -5
I have cast a few ingots of sterling and was trying to roll them out... Im not sure if the mill needs adjustment, but it is a bit jerky when I try to send the ingot through... I do know that I need to get some thicker bolts to secure my mill to my bench as the mill moved when rolling became more difficult... Is the jerkyness expected when rolling a freshly cast 3.5 or 4mm ingot?
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Don
Cave Dweller
He wants you too, Malachi.
Member since December 2009
Posts: 2,616
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Post by Don on Jan 7, 2015 16:01:49 GMT -5
you might have the aperture closed down too tight. open it up a bit and roll the ingot multiple times using a progressively smaller aperture. You'll want to anneal the metal frequently as well to keep it from becoming brittle.
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Post by pauls on Jan 9, 2015 18:24:17 GMT -5
Or it could be open too far and the gears are at the point of not meshing, most small mills only open to about 4mm or 5mm. Get yourself a short length of railway line to use as an anvil, temper your ingot and then hammer it down to something a bit thinner. You will need to temper your ingot very regularly as it work hardens after each roll and becomes impossible to work. Forcing it will not achieve anything and could damage your mill.
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alan
starting to spend too much on rocks
Member since December 2013
Posts: 111
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Post by alan on Jan 12, 2015 7:49:25 GMT -5
Thanks for the advice! Now if I can just find someone to make me a RR track anvil:)
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rocpup
spending too much on rocks
Pink Limb Iris
Member since March 2011
Posts: 465
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Post by rocpup on Jan 25, 2015 7:31:32 GMT -5
I have recovered a lot of scraps with my mill. One of the problems is getting a piece thin enough to go through the mill. I took an old soldering pad. I used my fordom and carved out a area about the size of a quarter. I melted my scrap in the carved area and quickly pressed the back of another soldering pad down on the molten silver. This will give a ingot about 1/8 inch thick and goes through the rolling well. I anneal about every three or four passes through the mill. The silver plates tend to crack around the edges. These can be used or cut away as needed. Don
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alan
starting to spend too much on rocks
Member since December 2013
Posts: 111
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Post by alan on Jan 25, 2015 17:33:14 GMT -5
Just got an annealing oven... This should help tremendously as my tiny hydrogen torch could never get larger pieces hot enough to do the job... Props to the HGMS also for allowing me to use their really nice rolling mill also...
Alan
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