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81X Steel Bushed Roller Chains
81X series chains were originally introduced in the early 1900s for heavy-duty industrial and agricultural conveying applications. However, these chains posed a great solution for mill applications that were facing issues with failing "standard" roller chains. Our 81X series roller chains offer exceptional performance at a value-based price point. Our chains include; fully heat-treat components, solid rollers, solid bushings, and in most cases a quad-staked rivet design to allow for side-loads. We stock standard 81X, heavy and extra heavy duty 81X chains, as well as roof-top/ camelback 81X chains.
How To Identify 81X Series Chain
The first thing you want to check is if there is a part number designation on the side of the chain. This will tell you right off the bat what chain you have. If this information is not on the sidebars of the chain then follow the below steps. 
1st: Measure the center of one pin to the center of the next one. This is commonly known as the pitch and is represented by dimension P on the above drawing.
2nd: Measure the pin diameter, this is represented by dimension D.
3rd: Measure the roller diameter, this is represented by dimension R.
4th: Measure the roller width, this is represented by dimension W.
5th: Measure the plate thickness, this is represented by dimension T.
6th: Measure the plate height, this is represented by dimension H.
after getting these critical dimensions you can match them up with the below chart to verify what size chain you have. Please notate any special additions like attachments, chrome pins, or stainless material when requesting the chain.
| (P) |
(D) |
(R) | (W) | (T) | (H) | |
|---|---|---|---|---|---|---|
| 81X | 2.609" | 0.437" | 0.905" | 1.062" | 0.156" | 1.122" |
| 81XH | 2.609" | 0.437" | 0.905" | 1.062" | 0.218" | 1.122" |
| 81XHH | 2.609" | 0.437" | 0.905" | 1.062" | 0.312" | 1.122" |
| 81XHD | 2.609" | 0.437" | 0.905" | 1.062" | 0.312" | 1.122" |
| 81XXHD | 2.609" | 0.437" | 0.905" | 1.062" | 0.312" | 1.122" |
| 81XHS | 2.609" | 0.437" | 0.905" | 1.062" | 0.312" | 1.264" |
| 81XHT | 2.609" | 0.437" | 0.906" | 1.060" | 0.220" | 1.125" |
| 81X-RT | 2.609" | 0.437" | 0.905" | 1.063" | 0.154" | 1.125" |
Note: 81XHH, 81XHD, and 81XXHD are the same size just with different part number designations.
Frequently Asked Questions
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If your order is less than $300, no problem! Please give us a call at 407-347-3519 or email Sales@usarollerchain.com, and we will be happy to assist you!
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USA Roller Chain utilizes an extensive network of vendors and warehouses to ensure you get your items quickly! Our primary roller chain warehouse is located in Clermont, FL, but we have warehouses located all across the United States. Your order will be shipped from the closest warehouse to you that has your requested product in stock. This speeds up transit times and saves you money on shipping! If you have any questions about where an item will ship from, please CONTACT US
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In-stock items are typically shipped out in 1-3 business days.Made-to-order item lead times vary from 1-2 days up to 14-20+ weeks, depending on the product. If you need your items urgently, please let us know, and we will do our best to meet your required delivery date! If you have any questions, please CONTACT US
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If you are having an issue with your order, please CONTACT US as soon as possible so we can resolve it for you.
Most in-stock items can be returned within 30 days of the shipment date. MTO or Custom orders are not eligible for a return or refund. For a detailed explanation of our return policies, please click here.
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Absolutely! We may be called "USA Roller Chain", but we ship worldwide! Please CONTACT US for Export/International quotes or orders.