Record 25 vice casting repair

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Solverson

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I recently picked an Irwin Record 25 vice out of a scrap bin at work. It was thrown there having “given out” whilst clamping a heavy casting that was having its bolts torqued to ~400Nm. Each time it slipped in the jaws, they gave the vice handle a hammering to tighten it further. As a result, the casting that braces against the half-nut has broken. The quick release mechanism had also been pulled over to one side and no longer engaged the screw. The vice was binned without any further investigation.

DSC_0281.JPG


Having rebuilt the vice, it all works fine but the half nut is now only half supported so I want to repair the damaged casting. The image below show the underside of the vice quick release mechanism




DSC_0291.JPG



The next image is looking to the vice with he front jaw removed – showing the broken part of the casting


DSC_0300_LI.jpg

The final image shows roughly where the half nut sits when it is engaged.


DSC_0304.JPG

According to the Irwin Record website, this vice is made from ductile iron. However, I am unsure how to proceed having never repaired cast iron before.

My thoughts are that I could get the broken part of the casting brazed back on as I still have it, but I am unsure how easy or how strong that repair would be. The second option would be build the area back up by welding it then grind it back into shape – again, I am unsure how easy this would be or how likely it would be to cause failure due to creating a heat affected zone around the weld. There are probably also other ways to repair this that I haven’t considered.

I’m guessing there will be guys on this forum that have experience of similar repairs and I would appreciate any advice I can get.

Thanks in advance :)
 

RichardG

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You could think about cutting off the other wing and then grinding to make a flat platform. Fabricate a new part from a steel block (hacksaw and file) and then drill and tap the casting to fit.
 

Gordon Tarling

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I'm fairly sure that the right person with the right knowledge would be able to braze or weld that part back on. Finding that right person might be a bit more of a challenge! In order to effect the repair, both parts will have to be heated to near red heat, the welding/brazing carried out and then the part cooled slowly. You might find more info about this sort of repair on the model engineering forum.

G.
 

Solverson

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You could think about cutting off the other wing and then grinding to make a flat platform. Fabricate a new part from a steel block (hacksaw and file) and then drill and tap the casting to fit.
Thank you for your advice - I hadn't really considered fabricating a replacement part but I think I'll have a go at making something and see how it looks.
 

Solverson

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I'm fairly sure that the right person with the right knowledge would be able to braze or weld that part back on. Finding that right person might be a bit more of a challenge! In order to effect the repair, both parts will have to be heated to near red heat, the welding/brazing carried out and then the part cooled slowly. You might find more info about this sort of repair on the model engineering forum.

G.
I had a look online and I think I have found a small copany that claims to be able to braze or weld anything - including castings. I think I'll visit them in the next week or so and get their opinion on it. As RichardG suggested - it might also be an idea to make a replacement part out of steel. It may even make sense to make a new part then get it brazed on. I'll let you know how I get on.

Thank you for your input.
 
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