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Technical Data Sheet
PartsTable / COMPONENT / 63A81B237
63A81B237 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

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: STEEL OVERALL, cup_width: 0.5625 INCHES NOMINAL IN, bore_diameter: 1.2500 INCHES NOMINAL IN, overall_width: 0.7150 INCHES NOMINAL IN, standout_width: 0.1525 INCHES NOMINAL IN, style_designator: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-275-0283, 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
63A81B237
NSN: 3110-00-275-0283
FSC: 3110
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.5625 INCHES NOMINAL IN
bore_diameter1.2500 INCHES NOMINAL IN
overall_width0.7150 INCHES NOMINAL IN
standout_width0.1525 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
cone_corner_radius0.1400 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN
backface_corner_radius0.0460 INCHES NOMINAL IN
overall_outside_diameter2.4410 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-275-0283
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 63A81B237 · 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
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CUP WIDTH: 0.5625 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN
•
STANDOUT WIDTH: 0.1525 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0460 INCHES NOMINAL IN
•
BORE DIAMETER: 1.2500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES
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 (FLIS)
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CUP WIDTH0.5625 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES MINIMUM AND 0.1870 INCHES MAXIMUM IN
STANDOUT WIDTH0.1525 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0460 INCHES NOMINAL IN
OVERALL WIDTH0.7150 INCHES NOMINAL IN
BORE DIAMETER1.2500 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
OVERALL OUTSIDE DIAMETER2.4410 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
40584Interchangeable
interchangeable cross-reference
interchangeable
211722Interchangeable
interchangeable cross-reference
interchangeable
WE-2457Interchangeable
interchangeable cross-reference
interchangeable
2938860-2Interchangeable
interchangeable cross-reference
interchangeable
SSCG-B-11-0Interchangeable
interchangeable cross-reference
interchangeable
2001055Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 63A81B237?
63A81B237 is a BEARING,ROLLER,TAPERED.
What parts can replace 63A81B237?
There are 16 known substitutes for 63A81B237: 40584, 211722, WE-2457 and 13 more. Substitute compatibility should be verified for your specific system.
Is 63A81B237 still available?
63A81B237 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026