81X Chain Sprockets
We supply the widest selection of 81X roller chain sprockets in the world! All of our 81x sprockets are manufactured using high-quality materials and are precision manufactured for optimum performance and working life. The majority of out 81X chain sprockets are manufactured from steel, but we also have cast sprockets. For washdown applications, we also supply high-quality 303, 304, 316-grade stainless steel 81X sprocket as well as plastic 81X sprockets.
81X sprockets work with chain sizes: 81X, 81XH, 81XHH, 81XHD, 81XXHD, 81XHS, 81X-RT, 81XHT
Common configurations for 81X sprockets are A-plate which is a simple plate sprocket, B-Hub which has a hub on one side, C-Hub which has a hub on both sides, idler, as well as split construction for both A and B hub style sprockets. Because of the ease in replacing, split sprockets are actually becoming more and more popular and the preference for most facilities, despite the higher initial cost.

81X Chain Sprocket Dimensions
| A-Plate | B-Hub | C-Hub | B-Split Sprockets | C-Split Sprockets | 从动链轮 | Plastic Sprockets |
|---|---|---|---|---|---|---|
| 81XA7 | 81XB7 | 81XC7 | SPLIT-81XB7 | SPLIT-81XC7 | 7-TOOTH | 5-TOOTH |
| 81XA8 | 81XB8 | 81XC8 | SPLIT-81XB8 | SPLIT-81XC8 | 8-TOOTH | 6-TOOTH |
| 81XA9 | 81XB9 | 81XC9 | SPLIT-81XB9 | SPLIT-81XC9 | 9-TOOTH | 8-TOOTH |
| 81XA10 | 81XB10 | 81XC10 | SPLIT-81XB10 | SPLIT-81XC10 | 10-TOOTH | 9-TOOTH |
| 81XA11 | 81XB11 | 81XC11 | SPLIT-81XB11 | SPLIT-81XC11 | 11-TOOTH | 10-TOOTH |
| 81XA12 | 81XB12 | 81XC12 | SPLIT-81XB12 | SPLIT-81XC12 | 12-TOOTH | 12-TOOTH |
| 81XA13 | 81XB13 | 81XC13 | SPLIT-81XB13 | SPLIT-81XC13 | 13-TOOTH | 13-TOOTH |
| 81XA14 | 81XB14 | 81XC14 | SPLIT-81XB14 | SPLIT-81XC14 | 14-TOOTH | 14-TOOTH |
| 81XA15 | 81XB15 | 81XC15 | SPLIT-81XB15 | SPLIT-81XC15 | 15-TOOTH | -- |
| 81XA16 | 81XB16 | 81XC16 | SPLIT-81XB16 | SPLIT-81XC16 | 16-TOOTH | -- |
| 81XA17 | 81XB17 | 81XC17 | SPLIT-81XB17 | SPLIT-81XC17 | 17-TOOTH | -- |
| 81XA18 | 81XB18 | 81XC18 | SPLIT-81XB18 | SPLIT-81XC18 | 18-TOOTH | -- |
| 81XA19 | 81XB19 | 81XC19 | SPLIT-81XB19 | SPLIT-81XC19 | 19-TOOTH | -- |
| 81XA20 | 81XB20 | 81XC20 | SPLIT-81XB20 | SPLIT-81XC20 | 20-TOOTH | -- |
81X Hooked Tooth Sprockets

| Sprocket Size | Tooth Count | Style | Outside Diameter | Hub Diameter | Length Thru Bore | Stock Bore | Max Bore |
|---|---|---|---|---|---|---|---|
| 81X-B8RH | 8 | B | 6.5" | 2.375" | 1.625" | 1" | 1.5" |
| 81X-B8LH | 8 | B | 6.5" | 2.375" | 1.625" | 1" | 1.5" |
81X C-Hub Sprockets

| Sprocket Size | Tooth Count | Style | Outside Diameter | Hub Diameter | Length Thru Bore | Stock Bore | Max Bore |
|---|---|---|---|---|---|---|---|
| 81XC7 | 7 | C | 5.75" | 2.375" | 2.375" | 0.75" | 1.5" |
| 81XC8 | 8 | C | 6.75" | 2.375" | 2.375" | 0.75" | 1.5" |
| 81XC9 | 9 | C | 7.438" | 2.375" | 2.375" | 0.75" | 1.5" |
81X Star Gear Sprocket

| Sprocket Size | Tooth Count | Style | Outside Diameter | Hub Diameter | Length Thru Bore | Stock Bore | Max Bore |
|---|---|---|---|---|---|---|---|
| 81X-SG510 | 10 | B | 4.484" | 2.375" | 2" | 1" | 1.5" |
Cast sprockets are compatible with the following sizes: 75, 78, 88, H78, H79, BRH, 188, C188 conveyor chain, SS188, 78, MXS882, MSR1288, 433-1/2, H74, H75, H78A rooftop chain, H78B rooftop chain, H78SR, BRH188 conveyor chain, MW188RT, 488 pintle chain, SS578, and 81X.
Steel sprockets are compatible with the following sizes: 78, H74, 75, H75, H78LR, H75RT, H78SR, H79, 88, 188, S188, S78, R588, RR588, R778, RR778, 988, IS880, 87R, IS881, 81X, IS882, 433-1/2, LXS881, LXS886, US881, LXS887, LXS882, 488 pintle chain, XS578, SS188, C188 conveyor chain, US278R, US882, 578R, and 588R.
Product Quick Detail:
- Standard and non-standard available
- With high quality and competitive price
- Prompt delivery
- Packing as per customer’s demand.
We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.
Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5.铁:1213,12 l14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port








