So I’ve gone through this exact situation on three chucks I’ve purchased. What I did on one with similiar wear was. Turned the main shaft to clean up then bush the mounting block. Most likely the hole is worn too. Then the small shaft you can see a spot that isn’t worn that’s your diameter. I bored it out then pressed a pin. Remake the linkage bar to your pin sizes all done.
I noticed you wrote the pin diameter as .312 then your linkage holes should be .313ish not both .376. That all your throw right there.
The magnet works by the offset of that main rod and the linkage piece putting the magnets in the correct spot. Same with demagnetizing the chuck.
I noticed you wrote the pin diameter as .312 then your linkage holes should be .313ish not both .376. That all your throw right there.
The magnet works by the offset of that main rod and the linkage piece putting the magnets in the correct spot. Same with demagnetizing the chuck.