Delcotron 12SI 1/2 wide pulley

Duner Wi · May 17, 2012

I need to find an A belt pulley (1/2 inch) pulley for 12 SI. ID is about .670 inch. OD need to be about normal size on Delcotron. Thanks.

Bob M · May 17, 2012

Visit your local starter/alternator rebuild shop. They will have a large selection of used sheaves including "A" width you need. Tip: Get the smallest OD you can find. Slow-turning tractor engines need a small sheave on the alternator to spin them at the RPM's they need.

Alternatively a sheave from most any old Delco tractor generator will fit. I used one salvaged off a '47 Minnie-Mo U - it fit the Delco 12SI perfectly.

Duner Wi · May 18, 2012

Thanks for reply.

Delcotron 12SI 1/2 wide pulley

Duner Wi

Well-known Member

Bob M

Well-known Member

Duner Wi

Well-known Member

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