OK, you got me...
The big disadvantage of a fully sealed oilbath QCGB is that although it doesn't fill with swarf, a dud gasket can leave it filled with stinky old cutting coolant... Scratch one set of bearings, thank the fates that the gears survived!
The bearings *should be* in 1922b outer cups - these are 2.250 diameter but have a flange on the "open" end to locate them inside the QCGB casting, and haven't been made since about 1965...
The replacements are "available" 1" bore taper roller wheel bea
rings at £5 each, with a 1.980" outside diameter, glued with Loctite Bearing Fit in a "top hat" machined to 2.250" outside with a flange, to put the inner bearing cone thrust face where it should be - so far they've worked, and they're definitely high-enough precision for the application!
I wouldn't do that with spindle bearings though
I took some pics, if I can find 'em...
Dave H. (the other one)
The big disadvantage of a fully sealed oilbath QCGB is that although it doesn't fill with swarf, a dud gasket can leave it filled with stinky old cutting coolant... Scratch one set of bearings, thank the fates that the gears survived!
The bearings *should be* in 1922b outer cups - these are 2.250 diameter but have a flange on the "open" end to locate them inside the QCGB casting, and haven't been made since about 1965...
The replacements are "available" 1" bore taper roller wheel bea
rings at £5 each, with a 1.980" outside diameter, glued with Loctite Bearing Fit in a "top hat" machined to 2.250" outside with a flange, to put the inner bearing cone thrust face where it should be - so far they've worked, and they're definitely high-enough precision for the application!
I wouldn't do that with spindle bearings though
I took some pics, if I can find 'em...
Dave H. (the other one)
Rules are for the obedience of fools, and the guidance of wise men...
(Douglas Bader)
(Douglas Bader)