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Unfortunatly I dont have time to send away samples I need to weld it quickly

I have a cast steel end shield from an electric motor that is cracked in 3 places.It is only about 10mm thick and every time I weld it the weld cracks.I am using 680s electrodes as this is all we have.Any comments or hints would be great. Graham

DYNAMIC - RUNNING ABOUT 2800 RPM BUT ONLY BRUSH GEAR ACTING ON IT SO NOT A LOT OF LOAD

I need to shrink fit a brass slip ring onto a mica covered shaft.The slip ring is approx 8.00" OD with a bore of 4.25".The shaft has about 1/8" thickness of mica wound onto it.How muck interferance do I need and what sort of temperature should I heat the slip ring to?

Hi all - I am in the process of rebuilding a Froude water brake but I am not sure if the vanes are overly worn. Can anyone tell me if parts are available and if so where can I source them. Sorry I dont have a nameplate or model number but I think it's late 80's. Any info would be greatly...

Hi all - this is my first time so please bear with me. Can anyone tell me how to test a "Metrosil" I am using it to try and reduce arcing on a DC contactor.It is one I found lying around the workshop and seemed to do the trick for a few months but now the arcing is getting worse again,and I'm...