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INA 81256 Bearing Details：

Bearing Name 81256 New Model 81256 Old Model bearing product Model 81256 Category Cylindrical Roller Thrust Bearings Brand INA Bearing Inner Diameter d ( mm ) 280 Outer Diameter D ( mm ) 380 Thickness B ( mm ) 80

INA 81256 Bearing   Bearing Size and Drawing：

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
FAG 51256 Bearing	280	380	80	FAG	Thrust Ball Bearings
NACHI 51256 Bearing	280	380	80	NACHI	Thrust Ball Bearings
NSK 51256 Bearing	280	380	80	NSK	Thrust Ball Bearings
FAG 51256 Bearing	280	380	80	FAG	Thrust Ball Bearings
TBS 81256 M Bearing	280	380	80	TBS	Thrust Roller Bearings
TBS 51256 M Bearing	280	380	80	TBS	Thrust Ball Bearings
INA 81256 Bearing	280	380	80	INA	Cylindrical Roller Thrust Bearings
SNR 51256 Bearing	280	380	80	SNR	Thrust Ball Bearings
NSK 51256 Bearing	280	380	80	NSK	Thrust Ball Bearings
TBS 51256 Bearing	280	380	80	TBS	Thrust Ball Bearings

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Thrust roller bearings (including thrust cylindrical roller, thrust tapered roller, and thrust self-aligning roller bearings) mainly consist of a shaft ring, a housing ring, rollers, and a cage.
They employ a line contact design and offer advantages such as extremely high axial load capacity, good rigidity, impact resistance, and the ability to withstand certain radial loads (thrust tapered roller bearings) or possess self-aligning functionality (thrust self-aligning roller bearings). Compared to thrust ball bearings, their axial load capacity and impact resistance are significantly stronger. Compared to thrust cylindrical roller bearings, thrust tapered roller bearings can withstand additional radial loads, while thrust self-aligning roller bearings can compensate for alignment errors, making them suitable for heavy-duty applications requiring higher load capacity, rigidity, and adaptability to operating conditions. These bearings are primarily used in heavy-load, low-speed, or medium-speed applications requiring the withstand of enormous axial thrust. Typical applications include ship propeller thrust shafts, large vertical turbine main shafts, heavy-duty crane slewing mechanisms, oil drilling rig rotary tables, rolling mill pressing mechanisms, large gearboxes, and hydraulic presses.