sako243
Member
- Messages
- 3,195
- Location
- My mansion in Wales
I'm finally getting around to replacing the discs on the back of the 110 and since I now have a "smallish" press I thought I'd make a tool to make pushing the bearing races simpler (previously used the tried and trusted technique of a large hammer and suitable drift).
So I cut a piece of scrap 5mm steel to weld inside an old race (so I could push down on it with the ram) which had a slit in it (to prevent it sticking in the hub). Threw a few quick tacks down (with the mig) and it worked well pushing in. I then tapped it with a hammer to pop it out and the race material broke off. Grabbed a drift and tapped out the old race.
Realising that the race material is hard (and therefore quite brittle I'd assume) thought well the way I "designed" it the scrap is pushing the old race so doesn't matter when pushing in. Then thought I can tap it out on the race than the scrap and not break it again. So broke out the welder again and this time ran a bead around the scrap.
Cue pushing on the other bearing race and what does numpty do after pressing it in, tap the scrap and breaks it off the race again.
So out of curiosity how would one make a less brittle joint?
From the failure all that happened was the weld broke off completely so looks like it fused with the race as that chunk came out. I'm guessing preheating is required?
Now I've just got to figure out how to build a tool that can push the old races out...
So I cut a piece of scrap 5mm steel to weld inside an old race (so I could push down on it with the ram) which had a slit in it (to prevent it sticking in the hub). Threw a few quick tacks down (with the mig) and it worked well pushing in. I then tapped it with a hammer to pop it out and the race material broke off. Grabbed a drift and tapped out the old race.
Realising that the race material is hard (and therefore quite brittle I'd assume) thought well the way I "designed" it the scrap is pushing the old race so doesn't matter when pushing in. Then thought I can tap it out on the race than the scrap and not break it again. So broke out the welder again and this time ran a bead around the scrap.
Cue pushing on the other bearing race and what does numpty do after pressing it in, tap the scrap and breaks it off the race again.
So out of curiosity how would one make a less brittle joint?
From the failure all that happened was the weld broke off completely so looks like it fused with the race as that chunk came out. I'm guessing preheating is required?
Now I've just got to figure out how to build a tool that can push the old races out...
Last edited by a moderator: