81180-M bearings ( 400 mm x 480 mm x 65 mm) have the advantages of extremely high axial load capacity, high rigidity, compact axial structure, and a detachable design for easy installation, and are therefore widely used in the Machine tool worktables, extruders, differentials, wind power equipment, and oil drilling machinery.

| Part Number | 81180-M |
| Bearing Type | Axial cylindrical roller bearings, Single direction, Single row |
| Design | 1 |
| Equivalent | 811 80 M |
| Series | 811 series (811..-M) |
| Cage | M = Brass cage |
| Accuracy class | PN (ABEC-1) |
| Rows NO. | One |
| Axial cylindrical roller and cage assemblies | K81180-M |
| Housing locating washer | GS81180 |
| Shaft locating washer | WS81180 |
| Weight [lb] | 54.4536 |
| Ca Axial Dynamic [lbf] | 269144 |
| C0a Axial static [lbf] | 1278486 |
| Cua Axial Fatigue [lbf] | 97694 |
| nB Speed ratings (grease) [rpm] | 221 |
| nG Speed ratings (oil) [rpm] | 634 |
| d φ Inside [inch] | 15.7480 |
| D Φ Outside [inch] | 18.8976 |
| T Thickness [inch] | 2.5591 |
| B Width [inch] | 0.7874 |
| D1 [inch] | 15.9055 |
| d1 [inch] | 18.7401 |
| r(min.) [inch] | 0.0787 |
| Mounting dimensions | |
| da [inch] | 18.6614 |
| Da(max.) [inch] | 16.2992 |
| ra(max.) [inch] | 0.0787 |
The 81180-M Cylindrical roller thrust bearings mainly consist of a shaft ring, a housing ring, cylindrical rollers, and a cage assembly. The rollers are arranged radially, forming a line contact load-bearing structure.
The advantages of cylindrical roller thrust bearings include extremely high axial load capacity, excellent rigidity, and a low coefficient of friction. Optimized roller end faces and flanges can accommodate slight eccentricity and impact loads, while also featuring a compact structure and high rotational accuracy.















