|Worm inserted in motor side block and ready to mount the motor coupling union. The Ruland double disc coupler will adjust to minor motor to worm shaft alignment differences (similar to the oldham coupler). This bearing block has 2 bearings so the worm must be inserted square and with care. I used the old bearing blocks with one positioned on the other end of the worm to gently push and the other block in front of the motor side block to push against. Without this support the front bearing in the new block will push out.||To keep a small gap between the shaft coupler and the front bearing race I used a piece of folded paper as a feeler gauge and gently pushed the coupler against it before tightening the allen screw on the collar. Otherwise I would recommend .005 to .010" gap if using a metal feeler gauge.|
| Worm mounted in block. Turning it manually gave a smooth feeling with no signs of binding.
As a side note, after removing the mounting screws I found the blocks fit snug into their positions. Maximum side to side movement along the worm axis between both blocks is approximately .020". fore and aft is 0" (absolutely no play. This shows how precise the machining is.
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| Mounting the motor was straight forward. I found that the screw studs on the motor mounting plate don't use Loctite and would turn trough the mounting plate when screwing on the hex standoffs. I recommend you put your finger nail against the opposite hole so the screw doesn't come out the other side.
The motor shaft slid effortlessly into the coupler with no jiggling so this shows the centerline of the worm and motor shaft are close in alignment. Once mounted tighten the allen screw on the coupler to lock the motor shaft.
Note: See installation steps below about coupler alignment.
|Motor mounted on block. No more motor to worm alignments!||Complete block assembly.|
|Installation - Note the steps to install the block.
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|Adjustment - Side view of worm block assembly showing adjustment screw. Keeping the worm assembly held gently against the RA gear, the mounting screws were turned snug. To adjust I slowly turned the adjustment screw until a slight play in gear mesh could be felt while gently rocked the RA axis. Afterwards I tightened the 2 mounting screws.|
Worm block and Ruland coupler alignment steps-