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NTN 81111 Bearing Details：

Bearing Name 81111 New Model 81111 Old Model 9111 bearing product Model 81111 Category Thrust Roller Bearings Brand NTN Bearing Inner Diameter d ( mm ) 55 Outer Diameter D ( mm ) 78 Thickness B ( mm ) 16

NTN 81111 Bearing   Bearing Size and Drawing：

Model	Inner Diameter d(mm)	Outer Diameter D(mm)	thickness B(mm)	Brand	Type
SNR 51111 Bearing	55	78	16	SNR	Thrust Ball Bearings
RHP 51111 Bearing	55	78	16	RHP	Thrust Ball Bearings
KOYO 51111 Bearing	55	78	16	KOYO	Thrust Ball Bearings
STEYR 51111 Bearing	55	78	16	STEYR	Thrust Ball Bearings
NSK 51111 Bearing	55	78	16	NSK	Thrust Ball Bearings
FAG 51111 Bearing	55	78	16	FAG	Thrust Ball Bearings
INA 81111TN Bearing	55	78	16	INA	Cylindrical Roller Thrust Bearings
NSK 51111 Bearing	55	78	16	NSK	Thrust Ball Bearings
RHP 51111 Bearing	55	78	16	RHP	Thrust Ball Bearings
STEYR 51111 Bearing	55	78	16	STEYR	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.