12-08-12, 08:51 PM
This is something I've been putting off doing since the MOT tester gave me an advisory a few months ago, so I'll be interested to hear how it goes!
I recall having a struggle when I changed them on my GPz305 ages ago. The bottom race in the headstock had virtually nothing to get a purchase on, in the end I used Dremel with a grindstone... inevitably, working upside-down I did a small amount of damage to the headstock too, but not enough to matter. Note the surface of the bearing is too smooth and hard for most drill bits.
Another possibility might be to weld a bridge of scrap steel across the bearing and that could give you something for the drift to act on.
Good luck!
I recall having a struggle when I changed them on my GPz305 ages ago. The bottom race in the headstock had virtually nothing to get a purchase on, in the end I used Dremel with a grindstone... inevitably, working upside-down I did a small amount of damage to the headstock too, but not enough to matter. Note the surface of the bearing is too smooth and hard for most drill bits.
Another possibility might be to weld a bridge of scrap steel across the bearing and that could give you something for the drift to act on.
Good luck!