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Blower sprocket question


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#1 Husky ONLINE  

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Posted August 24, 2015 - 11:48 AM

Hi, I am replacing a sprocket that runs a #40 chain. I see that sprockets are listed by pitch size. Is a 40 pitch sprocket what I want to use with a #40 chain?  From the research I've done it appears that would be the case. I need a 26 tooth 1" bore sprocket that will run a #40 chain.Thank you for any thoughts on this.


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#2 Paulgo ONLINE  

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Posted August 24, 2015 - 12:03 PM

Good question. Another thing I would like to know more about! I'll be reading along with you. :) Paul



#3 esbbent OFFLINE  

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Posted August 24, 2015 - 12:08 PM

#40 chain is same as 40 pitch chain. You are looking for a 26T 1" bore 40P sprocket. Check local bearing/chain stores about having them, Surplus Center lists them on their website, their item number is : 1-2123-26-E. You may want to look at replacing the chain also with the sprocket. The chains do stretch and wear out on the rollers.

 
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#4 Cat385B ONLINE  

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Posted August 24, 2015 - 12:20 PM

First # is distance between pins, measured in 1/8" increments. Second # is duty rating.

#40 roller chain is 1/2" pitch (4-1/8" increments) and standard duty. (0) #41 would be 1/2", only light duty. #45 would be 1/2", with no pin in the roller.

Short answer, yep; you need 40 pitch.
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#5 Bruce Dorsi ONLINE  

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Posted August 24, 2015 - 12:35 PM

You can download the dimensions for common roller chains here:

 

http://www.diamondch...eries-chain.php

 

Just click on the download button for "Diamond Series Spec Sheet."


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#6 29 Chev OFFLINE  

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Posted August 24, 2015 - 06:43 PM

Most farm supply and auto parts stores stock or can get sprockets and hubs that can be welded together to make what you need - for example in your case you would buy a hub with a 1" bore and then the corresponding 26 tooth sprocket for number 40 roller chain and weld the hub to the sprocket.  Here is a link to the TSC web site that shows hubs and sprockets http://www.tractorsu...prockets-chains . 

 

The concept is that you can use the hub and sprockets or pulleys to make up a gear or pulley with the correct size hub and the correct number of teeth and chain pitch in the case of a sprocket or correct belt width and outside diameter in the case of a pulley which saves on inventory costs.


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#7 Husky ONLINE  

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Posted August 25, 2015 - 11:23 AM

Guys this is great information. Thank you for all your help. I already have the new chain, just need to order the sprocket assy or the individual pieces. 



#8 LPBolens OFFLINE  

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Posted August 26, 2015 - 10:01 AM

Make sure that it really uses #40 chain rather than #41 chain. #40 is wider than #41, but has the same pin-to-pin distance. I found that on the Bolens Power Ho's that I have the correct chain is #41.






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