Primary Clutch

Oct 22
2011

Primary Clutch on CVT?

Hey, I have a question regarding the primary clutch on a Variable belt diameter continuously variable transmission for snowmobiles/four wheelers.

How are the pulleys mounted onto the output shaft from the engine? I understand how the pulleys work relative to each other but i don’t know how you mount the whole setup on the engine output shaft. It it a press fit or a spline or something else?

Any info is helpful, i’m doing a project about continuously variable transmissions and trying to wrap my head around them, and how they are put together.

Usually, these pulleys are mounted using a key in a slot that’s ground into the shaft.

You slide the pulley on then gently insert the key, and tap it into place.

This keeps the pulley from slipping on the shaft.

Argo Primary Clutch

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