231SM280-MA Bore 280 Mm, Spherical Roller Bearings Split, Inner Ring Without Central Rib, Solid Brass Cage
The 231SM280-MA Split spherical roller bearings are widely used in heavy equipment where maintenance is limited or quick replacement is required, including: continuously operating conveyor equipment (belt conveyor rollers), mining machinery (bucket wheel excavators), ship propulsion shafts, papermaking machinery (drying cylinders), steel rolling mills, and large fans.
The 231SM280-MA bearing is a Spherical roller bearings Split, Inner ring without central rib with an inner diameter of 280 mm , an outer diameter of 500 mm, a width of 218 mm. GCr18Mo, G20Cr2Ni4A rings, GCr18Mo, G20Cr2Ni4A rolling mlement. Its dynamic radial rated load is approximately 2318711 N, its static radial rated load is approximately 3899620 N. together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
231SM280-MA bearings ( 280 mm x 500 mm x 218 mm) have the advantages of The split design facilitates installation and maintenance, reduces downtime, and retains the heavy-duty capacity and self-aligning performance, and are therefore widely used in the Continuous casting machines, rolling mills, large conveying equipment, papermaking machinery, and ship propulsion systems.
| Part Number | 231SM280-MA |
| Interchangeable | FAG 231SM280-MA |
| Design | 1 |
| Bearing Type | Spherical roller bearings Split, Inner ring without central rib |
| Splitted | SM = Split bearing metric |
| Bearing Mass - m [lb] | 319.667 |
| Rows NO. | Double row |
| Cage | MA = Solid brass cage |
| Design Type | E1A = without central rip |
| Replacement Bearing | 23160K |
| Replacement Adapter sleeve | H3160HG |
| Housing | SD3160TS |
| Dimension | |
| Inside - d φ [mm] | 280 |
| Outside - D Φ [inch] | 19.685 |
| Width - B [inch] | 8.583 |
| Width - C [inch] | 6.299 |
| r(min.) [inch] | 0.197 |
| Performance | |
| Radial Dynamic - Cr [lbf] | 521246 |
| Radial static - C0r [lbf] | 876634 |
| Radial Fatigue - Cur [lbf] | 59398 |
| Limiting speed - nG [min–1] | 385 |
| Permissible axial load - Fa(max.) [lbf] | 9878 |
| Screw tightening torque - Mi [Nm] | 190 |
| Screw tightening torque - Ma [Nm] | 120 |
| Coefficient | |
| e | 0.29 |
| Y1 | 2.32 |
| Y2 | 3.45 |
| Y0 | 2.26 |
The 231SM280-MA Split spherical roller bearings consist of a split outer ring (divided into two halves), a split inner ring (divided into two halves), drum-shaped rollers, and a split cage. Each component is connected and secured by bolts or locating pins, allowing for independent installation and disassembly without relying on other parts of the shaft or bearing housing.
Split spherical roller bearings offer extremely convenient installation and maintenance, eliminating the need to disassemble adjacent components such as couplings and gears on the shaft, significantly reducing downtime. They possess the self-aligning function of standard self-aligning roller bearings, compensating for misalignment and shaft bending. They have high load-bearing capacity, are impact-resistant, and suitable for hard-to-access equipment locations.
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