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A-2988 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

A-2988: BEARING,ROLLER,TAPERED.

The BEARING,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: RUBBER CHLOROPRENE CLASS CR OVERALL, hole_diameter: 0.156 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, outside_diameter: 9.188 INCHES NOMINAL IN, special_features: SLOT 0.625IN.LG,0.188IN.W CTR BOLT CIRCLE DIAMETER IN, style_designator: CIRCULAR, aperture_diameter: 7.312 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-410-0003, 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
A-2988
NSN: 3110-00-410-0003
NIINs: 004100003, 011246433
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR OVERALL
hole_diameter0.156 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
outside_diameter9.188 INCHES NOMINAL IN
special_featuresSLOT 0.625IN.LG,0.188IN.W CTR BOLT CIRCLE DIAMETER IN
style_designatorCIRCULAR
aperture_diameter7.312 INCHES NOMINAL IN
bolt_hole_quantity8
bolt_circle_diameter8.250 INCHES NOMINAL IN
cross-sectional_thickness0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
NSN3110-00-410-0003
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A-2988 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
RETAINER FABRICATION METHOD: PRESSED
•
CUP WIDTH: 1.8105 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, DOUBLE CONE, SINGLE CUP
•
OVERALL OUTSIDE DIAMETER: 4.4375 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0300 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
CONE WIDTH: 2.3105 INCHES NOMINAL IN
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODPRESSED
CUP WIDTH1.8105 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, DOUBLE CONE, SINGLE CUP
OVERALL WIDTH2.3250 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER4.4375 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0300 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
CONE WIDTH2.3105 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER2.8765 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 3
0650724-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
650724Reference document
Same NSN cross-reference
Reference document — Secondary reference
A34775Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A-2988?
A-2988 is a BEARING,ROLLER,TAPERED.
What parts can replace A-2988?
There are 3 known substitutes for A-2988: 0650724-8, 650724, A34775. Substitute compatibility should be verified for your specific system.
What is the NSN for A-2988?
A-2988 is cataloged in the U.S. Government catalog under NSN 3110-00-410-0003. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.