A few pics:
Damaged nut (knee)
Knee gib adjusting screw. The hex socket had split and I couldn't turn it with a hammer and punch. So I had to drill it out, which was problematic as the position of the screw meant that the ways were in the way (perhaps that is how they got their name). So the result was an angled hole. Whilst the extractor opened it up, the internal threads were not damaged.
It came out in 2 pieces.
Next to one that is intact.
The only other problem I have found is the knee crank shaft is bent. Now I knew this was the case and didn't think it would be a problem, as I can straighten the shaft in my press.
However, I went to remove the shaft and found that the clutch the handle mates with extends beneath the threaded collar the dial lock sits on and will not slide off. My options now are to try and straighten the shaft whilst it is still in the knee. If that doesn't work I may have to cut it to get it out and then weld on a new section and turn it down. The dial covers the three screws that retain the bearing, that holds the shaft in the knee.
Damaged nut (knee)
Knee gib adjusting screw. The hex socket had split and I couldn't turn it with a hammer and punch. So I had to drill it out, which was problematic as the position of the screw meant that the ways were in the way (perhaps that is how they got their name). So the result was an angled hole. Whilst the extractor opened it up, the internal threads were not damaged.
It came out in 2 pieces.
Next to one that is intact.
The only other problem I have found is the knee crank shaft is bent. Now I knew this was the case and didn't think it would be a problem, as I can straighten the shaft in my press.
However, I went to remove the shaft and found that the clutch the handle mates with extends beneath the threaded collar the dial lock sits on and will not slide off. My options now are to try and straighten the shaft whilst it is still in the knee. If that doesn't work I may have to cut it to get it out and then weld on a new section and turn it down. The dial covers the three screws that retain the bearing, that holds the shaft in the knee.
Hunting American dentists since 2015.