We had a mill head break the other day. Its an old bridgeport three axis vertical. A guy was doing angle work and he sheared the bolt for the control of rotation about the y axis. The thing is a shaft with a bolt head, that uses a key to hold a pinion gear on the shaft. We got it ground out and are replacing it after romving the head, but when we had the head off we noticed that where the four bolts go into the head there is a t-slot ring in the casting that is just all torn up. There is a lot of casting crap that we don't want to touch because we tried filing it in one place and it came off in a chunk. there are a lot of chunks out and we left it to just cleaning up the burrs on the edges. Anyone else experienced this or have any ideas about a more permanent fix? |