Belt size tolerances - Snowblower Forum : Snow Blower Forums
 
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post #1 of 7 Old 12-20-2016, 08:49 PM Thread Starter
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Belt size tolerances

I'm in the process of ordering a spare auger and drive belt for my 1979 Ariens (924039). I've gathered the Ariens part numbers as follows:

Drive: 072098 - 3/8" x 33"
Auger: 072108 - 1/2" x ?

My question is regarding the auger belt circumference. Some sources list 36", some list 37", and others 36.5". Is a 1 inch tolerance acceptable for an auger belt? I ask because I am buying generic kevlar belts to avoid OEM prices, but I want to know what size is best to order.

Anyone encounter this before?

My machine:
1979 Ariens 924039 (24", 8hp w/ differential)
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post #2 of 7 Old 12-20-2016, 09:23 PM
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These Pix belts are great.



The idler pulley for the auger is adjustable so you can slop a bit. The old school dimensions were 36.8 for the belt number 07210800 just FYI.
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post #3 of 7 Old 12-21-2016, 12:12 AM
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The width/anlge of the belt also influences how low it rides in the pulley and therefore the length...... a slight difference make a pretty big difference one way or the other. Try to go by the OE specs as much as you can...... some auto and farm stores have a belt measuring tool if you are unsure - take the old one in. The Kevlar or Aramid fiber belts like the Pix belts are very good quality......




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post #4 of 7 Old 12-21-2016, 07:50 AM
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I checked a couple of my regular sources and a 36.5" length seems to be the consensus.

Here's a Kevlar wrapped belt matching your specs on eBay with free shipping):

72108 ARIENS SNOWBLOWER BELT Kevlar replacement BELT 1/2x 36.5 OD (2K23) | eBay

Interesting that the Ariens specs are so difficult to uncover . . . . I suspect that Ariens wants you to buy theirs.
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post #5 of 7 Old 12-21-2016, 09:27 AM
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For future reference:
Main Belts Sizes Reference

Ariens 07210800 36.8 x 0.531 4L Section 36-13/16 x 17/32, 36.813 x .531
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post #6 of 7 Old 12-21-2016, 01:10 PM
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I used a Kevlar 4l360 worked fine on my 924039.
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post #7 of 7 Old 12-22-2016, 01:38 PM Thread Starter
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Thanks for all of the great suggestions! Looks like I have plenty of options aside from OEM. I'll try to pick up one of the 36.5" belts on eBay. If not, I'll aim for 37" as it's closer to 36.8

My machine:
1979 Ariens 924039 (24", 8hp w/ differential)
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