What chain do I have here ?
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=197805
Printed Date: 25 Sep 2024 at 3:38am
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Topic: What chain do I have here ?
Posted By: Macon Rounds
Subject: What chain do I have here ?
Date Posted: 20 Oct 2023 at 12:50pm
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Parts IPC does not indicate size. Side plates on chain says 50 but data on 50's does not match what I have. This is stamped on chain ?orsE or MorsE Here is data on my chain. Pitch. .625 Roller dia .400 Distance between inner plates .375 Side plate thickness .095 ------------- The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate |
Replies:
Posted By: Macon Rounds
Date Posted: 20 Oct 2023 at 12:52pm
 ------------- The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate |
Posted By: Ky.Allis
Date Posted: 20 Oct 2023 at 1:10pm
| Usually when a chain fits like that, the chain or sprockets or both are worn out. Remove it and lay it on a flat surface next to a new chain with same no. of links and measure the length of each. |
Posted By: Macon Rounds
Date Posted: 20 Oct 2023 at 1:18pm
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Chain is far from worn out. Picker in shop for lub and adjustments. Lots of rub blocks on this machine. So after first few runs with rusty old chain they all need adjusted. ------------- The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate |
Posted By: Tbone95
Date Posted: 20 Oct 2023 at 1:56pm
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I don’t think your sprocket looks that bad, like you said just needs a little snugging. Number 50 W or heavy maybe? Should be able to look up a chain table easy enough. I’m not at work or I’d have one a foot from my left hand. |
Posted By: Stan R
Date Posted: 20 Oct 2023 at 2:37pm
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What doesn't match?? https://www.usarollerchain.com/50-roller-chain-s/1942.htm" rel="nofollow - https://www.usarollerchain.com/50-roller-chain-s/1942.htm |
Posted By: DanielW
Date Posted: 20 Oct 2023 at 3:08pm
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Your dimensions match the spec's of #50H roller chain. The 'H' stands for 'heavy'. Most manufacturers offer standard and 'heavy' roller chain - the difference being the sidebar thickness and thus tensile strength. In these cases, the number is typically followed by an 'H'. As you provably know, the first digit represents pitch in eighths of an inch (or first two digits if a three-digit chain). So #50 = 5/8" pitch = 0.625" as you posted. #120 = 12/8" pitch, etc. If it's preceded by a '20' for a two digit chain or '2' or three digit chain, it's double pitch. Ex. 2050 roller chain = 2 X 5/8" = 1.25" pitch. Double-pitch is used on a lot of farm equipment to save on cost (half as many links/pins/rollers to make), and is sometimes used in industrial equipment on sprockets with odd numbers of teeth so it engages a different set of teeth each revolution and thus halves the wear on sprocket teeth (called a 'hunting tooth' design). Roller chain is available in standard roller or high roller. Standard roller diameter for #50 is 0.4". Roller width (between side bars) for #50 is 0.375". Only difference between yours and standard is side-bar thickness. Standard is 0.08", but heavy is 0.095" (what you have). See dimensions in this link: https://www.usarollerchain.com/50H-Heavy-Roller-Chain-p/eco-50h-10ft.htm" rel="nofollow - https://www.usarollerchain.com/50H-Heavy-Roller-Chain-p/eco-50h-10ft.htm
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Posted By: DanielW
Date Posted: 20 Oct 2023 at 3:12pm
| I should also add, standard roller chain (not heavy) will work on your sprockets just fine. Unless it's a really, really heavy-duty application I don't think I'd worry about trying to find heavy. We use it at work on equipment we make that's in service for 10 hours a shift, 2 shifts a day, 365 days a year. I doubt any Allis equipment is seeing that much use. Only time I buy heavy at home is when I have to weld lugs or attachments to the links. |
Posted By: Macon Rounds
Date Posted: 20 Oct 2023 at 4:28pm
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GREAT information fellas ! Figures I would look up the only chart with a misprint. This chart has #50 chain pitch is .525 Grrrrrr !!! Chain on order now. :-)  ------------- The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate |
Posted By: AaronSEIA
Date Posted: 21 Oct 2023 at 5:15am
Think the .525 is a typo. Everything else I see on Google says 5/8 or .625. AaronSEIA
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Macon Rounds wrote:Posted By: TramwayGuy
Date Posted: 21 Oct 2023 at 7:55am
| Divide by 80 to get the pitch. 60/80 is .75” 40/80 is .50”, etc. works for any chain ending in “0”. If it starts with a ‘20’ I.e. ‘2060’ then it’s double length. |