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NTN 81128 Bearing Details：

Bearing Name 81128 New Model 81128 Old Model 9128 bearing product Model 81128 Category Thrust Roller Bearings Brand NTN Bearing Inner Diameter d ( mm ) 140 Outer Diameter D ( mm ) 180 Thickness B ( mm ) 31

NTN 81128 Bearing   Bearing Size and Drawing：

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
FAG 51128 Bearing	140	180	31	FAG	Thrust Ball Bearings
NTN 51128 Bearing	140	180	31	NTN	Thrust Ball Bearings
KOYO 51128 Bearing	140	180	31	KOYO	Thrust Ball Bearings
INA 81128 Bearing	140	180	31	INA	Thrust Roller Bearings
NSK 51128 Bearing	140	180	31	NSK	Thrust Ball Bearings
INA 81128 Bearing	140	180	31	INA	Thrust Roller Bearings
NTN 81128 Bearing	140	180	31	NTN	Thrust Roller Bearings
TBS 51128 Bearing	140	180	31	TBS	Thrust Ball Bearings
STEYR 51128 Bearing	140	180	31	STEYR	Thrust Ball Bearings
NSK 51128 Bearing	140	180	31	NSK	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.