Craig-SM
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- 1,757
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- Heckmondwike
Bought this off a forum member today with a QR problem. Got it home and had a quick look to see the that the screw was winding itself into the dynamic jaw until the boss on the handle would bind against the QR handle so moving in a around an inch. This was a bit puzzling as I've never seen them do this before.
Stripped it down to find a big problem. The hole/bush in the dynamic jaw for the screw has been worn open to larger than the fixed stop washer on the screw. The fixed stop washer on the screw is no longer flat but dome and instead of around 5mm and flat. The hole/bush at the rear of the jaw to support the end of the screw has also been worn open with around 2mm of play. The rest of the vice, other than lots of surface rust, shows very little wear and use, even the anvil part is unmarked.
First question, can this be fixed?
Possible solution 1. Brass bushes at the front and rear of the dynamic jaw to fit the screw. Possible at the back but would there be enough material at the front to take the open up and fit a bush without wearing it?
Screw wound need to machined so the fixed stop washer is flat and another washer welded on and machined to the correct thickness.
Possible solution 2. New jaw and screw but probably too expensive.
Third solution would be to scrap it which none of like to do.
Second question, just how do you create such damage without the screw and block giving way first?
Stripped it down to find a big problem. The hole/bush in the dynamic jaw for the screw has been worn open to larger than the fixed stop washer on the screw. The fixed stop washer on the screw is no longer flat but dome and instead of around 5mm and flat. The hole/bush at the rear of the jaw to support the end of the screw has also been worn open with around 2mm of play. The rest of the vice, other than lots of surface rust, shows very little wear and use, even the anvil part is unmarked.
First question, can this be fixed?
Possible solution 1. Brass bushes at the front and rear of the dynamic jaw to fit the screw. Possible at the back but would there be enough material at the front to take the open up and fit a bush without wearing it?
Screw wound need to machined so the fixed stop washer is flat and another washer welded on and machined to the correct thickness.
Possible solution 2. New jaw and screw but probably too expensive.
Third solution would be to scrap it which none of like to do.
Second question, just how do you create such damage without the screw and block giving way first?
