OPT081 - Lightweight hub for spur gear

A lightweight hub for spur gears compatible with 1/4 inch size rear shafts.

An O-ring groove is placed in the spur gear fitting part, and it is possible to absorb variations when the inner diameter of the spur gear is large (e.g. Kimbrough) and there is play.

When installing the O-ring, apply silicon oil and lubricate it sufficiently to prevent it from getting caught. In addition, if there is no play with the spur gear, it is not necessary to install the O-ring.

It has a counter weight shape for better weight balance.  The center of gravity of the hub coincides with the center of the shaft.

The weight including mounting screws and O-ring is only 1.9g. The spur gear mounting screws are M3, so you can use general aluminum or titanium screws to make it lighter. Mounting to the shaft is M2.5 steel screws. Be careful not to over-tighten the mounting screws.

The PCD with spur gears is compatible with commercially available general spur gears (Kimbrough, AXON, etc.).

Comes with O-ring and M2.5 screws for shaft mounting.