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Rostock boxed idler end for 12 tooth T5 pulley

by chowderhead, published

Rostock boxed idler end for 12 tooth T5 pulley by chowderhead Oct 21, 2012
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Designed to align with the 12 tooth T5 pulley which is going on my CheapStock.

Boxed the bearing shaft so there's less tendency to torque the bearing shaft upon tensioning the belt. Also added additional mounting holes with the intent of sharing some stress with the top panel.

So far, has worked swimmingly - no belt movement, no belt rubbing; nice, low friction even with belts tightened like guitar strings.


Put the 3mm screws and nuts in before mounting the bearing.

Assembly is facilitated by plasti-forming the shaft threads:
Thread the rod/bolt into the hole just about half way.
Place an 8mm washer on the rod/bolt in the interior of the box.
Place the first bearing on the rod/bolt.
Thread a little further into the box so rod/bolt extends just past the first bearing.
Place the second bearing on the rod/bolt.
Thread more until flush with second bearing.
Put another washer on.
Thread rod/bolt through.
Tighten it up.

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Is there a certain reason why the bearing axle is off center?

Greetings from Berlin:::shortage::::

Yes: To keep the belt inline with the pulley (12 tooth T5).