Hey guys,
I've got a spur gear that I want to fix. It sits on a shaft with a split pin going through both (it is part of a swager that I want to get working again.)
It would appear that from excessive pressure (to try and form a metal too thick, no doubt) or perhaps from age, the collar has cracked. Somebody already tried to repair it but it cracked again. Upon closer inspection, it appears there was no penetration from welding at all. They reattached the bits that had broken off and laid a couple of tiny slugs on the surface.
My plan is to grind a few mil off and grow the colar back by laying a few welds, then dress and bore it for the split pin and shaft.
Another option would be to have a collar made (and possibly hardened), then have the gear machined down till completely flat and weld the two. Immediate problem I see is welding would be on the outside so very little to no penetration on the inner side where shaft goes.
Option 3 is to have the gear made from scratch. No idea on the cost of that so probably my last resort.
What do you guys reckon?
The ID of the gear is only 25mm. May look bigger in the pictures.
Thanks.
I've got a spur gear that I want to fix. It sits on a shaft with a split pin going through both (it is part of a swager that I want to get working again.)
It would appear that from excessive pressure (to try and form a metal too thick, no doubt) or perhaps from age, the collar has cracked. Somebody already tried to repair it but it cracked again. Upon closer inspection, it appears there was no penetration from welding at all. They reattached the bits that had broken off and laid a couple of tiny slugs on the surface.
My plan is to grind a few mil off and grow the colar back by laying a few welds, then dress and bore it for the split pin and shaft.
Another option would be to have a collar made (and possibly hardened), then have the gear machined down till completely flat and weld the two. Immediate problem I see is welding would be on the outside so very little to no penetration on the inner side where shaft goes.
Option 3 is to have the gear made from scratch. No idea on the cost of that so probably my last resort.
What do you guys reckon?
The ID of the gear is only 25mm. May look bigger in the pictures.
Thanks.