1" Shaft to 3/4" Shaft - Snowblower Forum : Snow Blower Forums
 
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post #1 of 9 Old 01-23-2016, 05:44 PM Thread Starter
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1" Shaft to 3/4" Shaft

Still deciding on which replacement engine to use on my older Ariens 24" snowblower with a Tec. 8 HP engine with a 1" shaft. I am considering the predator 212cc, which has a 3/4" shaft. I would have to change the pulley. Will this affect the rpm's of the impeller ? What about the belt size ? Is there anything else I need to consider when going to the 3/4" shaft ? Thanks.

Last edited by Landngroove; 01-23-2016 at 05:50 PM. Reason: need more info
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post #2 of 9 Old 01-23-2016, 05:56 PM
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There is the option of using an adapter and reusing your old pulley.


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post #3 of 9 Old 01-23-2016, 05:59 PM
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as long as you get the same size pulley, rpm or belt size will stay the same.

24 " 1967? Ariens Sno thro
28 " Ariens Sno Tek
Toro CCR ss
1966 Gravely LI Walk behind with dog eater

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post #4 of 9 Old 01-23-2016, 06:09 PM
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Adapters are one method, or the same diameter pulley with a 3/4" bore is another. both Mcmaster-Carr, and Grainger, and also
Amazon offer the pulley you need.
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post #5 of 9 Old 01-23-2016, 07:01 PM
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I would go with the 3/4" to 1" adapter. I recently got 2 of them. The one that dbert posted and another at the link below. Night and day difference in quality.

I would go with this one. Much nicer machining on it:

3 4" to 1" inch w Step Key Gas Engine Pulley Crank Shaft Sleeve Adapter Predator | eBay
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post #6 of 9 Old 01-23-2016, 07:43 PM
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For a single pulley engine I would just buy a new pulley. The adapters cost around $15-$20 and then you reuse the pulley. A new pulley is generally $8-$15 and then you still have the old pulley for a future project. If you have a dual belt setup or something more specialized then the adapter will be cheaper.

For belt length that will matter on the engine. Some of the 8HP engines had the crankshaft a little higher so they used longer belts.

The RPM is controlled solely on the pulley diameter so if you stay with the same size that won't change. You could upsize it to spin the impeller faster though.

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post #7 of 9 Old 01-23-2016, 07:52 PM
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I get Bronze sleeves from Ace Hardware for $5. You can Fab a key.
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post #8 of 9 Old 01-23-2016, 07:55 PM
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Quote:
Originally Posted by Ariens-777 View Post
I would go with the 3/4" to 1" adapter. I recently got 2 of them. The one that dbert posted and another at the link below. Night and day difference in quality.

I would go with this one. Much nicer machining on it:

3 4" to 1" inch w Step Key Gas Engine Pulley Crank Shaft Sleeve Adapter Predator | eBay
Looks like a quality piece, and good feedback from buyers.
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post #9 of 9 Old 01-23-2016, 10:33 PM
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maybe you can find a matching diameter pulley for 3/4" shaft here - Steel V-Belt Pulleys | Lawn Mower Parts | MFG Supply
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