Aluminum pulley for M90 blower.

[hotrodcbx]

I had exactly the same issue with my blown 8BA. The original one from B&M was not a tight fit on the crank and over time it destroyed the keyway on the pulley. I had a new one machined from aircraft grade aluminum that was a semi-pressed fit. Cost was $325.00..

[32truck]

Originally Posted by hotrodcbx

I had exactly the same issue with my blown 8BA. The original one from B&M was not a tight fit on the crank and over time it destroyed the keyway on the pulley. I had a new one machined from aircraft grade aluminum that was a semi-pressed fit. Cost was $325.00..

I'm thinking about going this route. I'm not sure which pulley I can find that will work with it yet but I really like the idea of a flange that I can easily switch pulleys. I may still have to get a pulley machined anyhow though.

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[38bill]

Can you cut off the old pulley and use it with the new adapter?

[Bob C]

How about something like this? The sheaves and bushings come in many sizes.
You could get a smaller bushing and have it bored to your shaft size.
https://www.ebay.com/itm/39228101691...id=20029977905

[cmbrucew]

You can broach a key way in the sleeve with a press.


Bruce

[Bored&Stroked]

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If that M90 pulley adapter fits your blower drive shaft, that is surely the way I'd go. For that price, isn't worth the time screwing around and making a one off.

[hotrodcbx]

Originally Posted by 32truck

I'm thinking about going this route. I'm not sure which pulley I can find that will work with it yet but I really like the idea of a flange that I can easily switch pulleys. I may still have to get a pulley machined anyhow though.

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Forgot to add, my pulley has bolt holes for a separate pulley. Wish I knew about the hub you show, would have saved me a few dollars!!