Gallery, Projects and General > How do I?? |
fixing an inaccurate hole ?? |
(1/2) > >> |
picclock:
Hi I seem to have made an error and drilled a 6.25mm hole 0.8mm out of alignment in a 10mm steel plate. It has to be a lot closer than that as it has a 2mm oring seal in an 11mmx1.3mm recess on the top and screws into a third party component. The question is how to fix it. If I just correct the offset there is a good chance the oring will leak. If I plug it using steel fixed with epoxy and re-drill the piece left would be very small. I could make the hole bigger and fit it with say an M10 threaded piece which could then be drilled in the correctly, but I don't think I have enough room. Alternately, I could put the hole in the correct place leaving an oval hole, but then counterbore the hole to say 3.3mm depth with an 11mm mill and epoxy fit a 2mm thick insert for the oring to seal against. Any better ideas much appreciated. Best Regards picclock |
awemawson:
Carefully measure your off set. Overbore your hole and loctite in an eccentric bush |
Jonny:
Think I know what it is. A few choices, scrap it or realign a larger hole central to O ring. My choice would be to realign hole where it should be and go larger diameter (min 7.05mm) for the bolt. If O ring is then too small a bore could use a larger 2mm cross section. Other alternative is keep hole where it is just realign and cut the O ring to the hole by going larger diameter and subsequently a BS numbered 2.62mm cross section O ring to 1.8mm deep. That brazed washer, is it machined after? If not you will have problems even with 0.7mm compression of o ring. |
Joules:
I would loctite in a tapered plug, then surface and re drill it. Assuming you can get the plate on the lathe. Top slide only needs setting once to bore hole and make tapered plug. |
sparky961:
I hope I didn't miss something that would rule it out, but what about building it back up with MIG or TIG? I've done this with countless holes that jumped over 1/2 inch thick when my back was turned. |
Navigation |
Message Index |
Next page |