winger
Stainless
- Joined
- Dec 28, 2005
- Location
- portage county, wisconsin
Brown and Sharpe 824 with a Walker electric chuck. About 40 - 50 years old. We got it from another plant about 25 years ago and I doubt the magnet was ever removed.
A couple months ago it was grinding a taper. (.005 in 8") So I reground the magnet and it was good for .0002 in 8".
Well it is tapering again, .0008 in 4" . ( taper is on the 8" direction)
Pulled the mag off and it was ugly with rust. Hopefully the rust was causing the movement and not something harder to fix.
I ground the bed and it was off .0005 or less.
The magnet is next, but I'm concerned that the bottom plate joint may also be a problem. Is it a bad idea to remove the bottom plate? 30 some screws and they are rusted badly also.
I plan on putting the magnet on upside down with low power and clean it up, then ink it up to see if it is close to a match to the bed.
I can't make it too much worse, its going bad on its own. I imagine the rust is from the coolant getting out of balance.
Side note: does anyone remove their magnet on a regular basis to stem rust?
Dave
A couple months ago it was grinding a taper. (.005 in 8") So I reground the magnet and it was good for .0002 in 8".
Well it is tapering again, .0008 in 4" . ( taper is on the 8" direction)
Pulled the mag off and it was ugly with rust. Hopefully the rust was causing the movement and not something harder to fix.
I ground the bed and it was off .0005 or less.
The magnet is next, but I'm concerned that the bottom plate joint may also be a problem. Is it a bad idea to remove the bottom plate? 30 some screws and they are rusted badly also.
I plan on putting the magnet on upside down with low power and clean it up, then ink it up to see if it is close to a match to the bed.
I can't make it too much worse, its going bad on its own. I imagine the rust is from the coolant getting out of balance.
Side note: does anyone remove their magnet on a regular basis to stem rust?
Dave