John B Posted April 27, 2019 Report Share Posted April 27, 2019 Well, I don't think I was being particularly hammer-fisted, but I stripped out the bloody thumbscrew on the top chuck of my Ex21. Can keep on going though by swapping the Allen screw and the thumb screw around to opposite sides. Bit the bullet and ordered a set of Pegas replacements from QTE. Don't even ask how much with the exchange rate. On Monday I will see if there is a machine shop that can fit helicoils to my spare top chuck, Yes I've done it before OCtoolguy 1 Quote Link to comment Share on other sites More sharing options...
JimErn Posted April 27, 2019 Report Share Posted April 27, 2019 ouch You could swap the set screw to the right side, but I doubt it would hold in place since the screw hole is stripped out, well is the screw hole stripped or is it the threads on the screw itself? helicoil works, I've used them before, though not on a scroll saw, assuming the threads on the adjusting screw are not buggered up too. Since you ordered the pegas clamps, I would suggest just sit back and wait for them to arrive John B 1 Quote Link to comment Share on other sites More sharing options...
munzieb Posted April 27, 2019 Report Share Posted April 27, 2019 Hi John, I had the same problem last year and did the helicoil repair. I explained it all in a thread " I had to do it" topic "thread repair". I also had the parts list for the kit in the thread. Contact me if you have questions. John B 1 Quote Link to comment Share on other sites More sharing options...
OCtoolguy Posted April 27, 2019 Report Share Posted April 27, 2019 9 hours ago, John B said: Well, I don't think I was being particularly hammer-fisted, but I stripped out the bloody thumbscrew on the top chuck of my Ex21. Can keep on going though by swapping the Allen screw and the thumb screw around to opposite sides. Bit the bullet and ordered a set of Pegas replacements from QTE. Don't even ask how much with the exchange rate. On Monday I will see if there is a machine shop that can fit helicoils to my spare top chuck, Yes I've done it before You'll be very happy with the Pegas clamps. I find that you really don't need to apply much pressure to hold the blades in. I do take the time to rub the ends of my blades over a piece of emery cloth that I keep close by. Just enough to rough them up and to remove any oil. John B 1 Quote Link to comment Share on other sites More sharing options...
Rockytime Posted April 27, 2019 Report Share Posted April 27, 2019 Heli-coils, wonderful things. Used them on lots of things. Usually stronger than the original threads. OCtoolguy and John B 2 Quote Link to comment Share on other sites More sharing options...
OCtoolguy Posted April 27, 2019 Report Share Posted April 27, 2019 1 hour ago, Rockytime said: Heli-coils, wonderful things. Used them on lots of things. Usually stronger than the original threads. I'm not sure they ever won favor in the aircraft industry though. For some reason, the Feds didn't like them. Quote Link to comment Share on other sites More sharing options...
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