This will be a challenge because the MDR machine uses adjustable needle bearings on the trunnion assembly, so there is no shaft on which to mount the potentiometer.
First, in order to be able to mount the digital meter and housing close to the frame, we must do something about the conical set screw and big acorn jam nut. We will replace it with a short 5/16-18 set screw and ball bearing. The ball bearing securely fits the drilling which used …
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