51291 — BEARING,BALL,ANNULAR

✓ Government record, cited

Mobiparts · TAPERED BEARING

PRODUCT OVERVIEW

51291: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a Mobiparts industrial component. Key specifications include bore_shape: STRAIGHT, bore_diameter: 20.00 MILLIMETERS NOMINAL MM, load_direction: ANGULAR, surface_finish: GROUND, inner_ring_width: 9.00 MILLIMETERS NOMINAL MM, outer_ring_width: 0.4020 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-944-6755, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

51291

NSN: 3110-00-944-6755
NIINs: 009446755, 011042726, 013124783
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)

SPECIFICATIONS

bore_shape	STRAIGHT
bore_diameter	20.00 MILLIMETERS NOMINAL MM
load_direction	ANGULAR
surface_finish	GROUND
inner_ring_width	9.00 MILLIMETERS NOMINAL MM
outer_ring_width	0.4020 INCHES NOMINAL IN
special_features	24 DEG OR 27 DEG CONTACT ANGLE ACCEPTABLE
internal_clearance	0.0015 INCHES MINIMUM RADIAL AND 0.0021 INCHES MAXIMUM RADIAL IN
overall_outside_diameter	37.00 MILLIMETERS NOMINAL MM
retainer_fabrication_method	MACHINED
standard_tolerance_designation	ABEC NO.5
NSN	3110-00-944-6755

COMPONENT DIAGRAM

KEY FEATURES

•

RETAINER FABRICATION METHOD: MACHINED

•

OUTER RING WIDTH: 0.4020 INCHES NOMINAL IN

•

INTERNAL CLEARANCE: 0.0015 INCHES MINIMUM RADIAL AND 0.0021 INCHES MAXIMUM RADIAL IN

•

SURFACE FINISH: GROUND

•

OVERALL OUTSIDE DIAMETER: 37.00 MILLIMETERS NOMINAL MM

•

BORE SHAPE: STRAIGHT

•

LOAD DIRECTION: ANGULAR

TECHNICAL CHARACTERISTICS

RETAINER FABRICATION METHOD	MACHINED
OUTER RING WIDTH	0.4020 INCHES NOMINAL IN
INTERNAL CLEARANCE	0.0015 INCHES MINIMUM RADIAL AND 0.0021 INCHES MAXIMUM RADIAL IN
SURFACE FINISH	GROUND
OVERALL OUTSIDE DIAMETER	37.00 MILLIMETERS NOMINAL MM
BORE SHAPE	STRAIGHT
LOAD DIRECTION	ANGULAR
SPECIAL FEATURES	24 DEG OR 27 DEG CONTACT ANGLE ACCEPTABLE
STANDARD TOLERANCE DESIGNATION	ABEC NO.5
BORE DIAMETER	20.00 MILLIMETERS NOMINAL MM

SUBSTITUTES & CROSS-REFERENCES 2

512193Reference document

Same NSN cross-reference

Reference document — Secondary reference

512192Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 51291?

51291 is a BEARING,BALL,ANNULAR manufactured by Mobiparts.

What parts can replace 51291?

There are 2 known substitutes for 51291: 512193, 512192. Substitute compatibility should be verified for your specific system.

What is the NSN for 51291?

51291 is cataloged in the U.S. Government catalog under NSN 3110-00-944-6755. This indicates validated use in U.S. government and defense supply chains.

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51291 — BEARING,BALL,ANNULAR

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