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Technical Data Sheet
PartsTable / COMPONENT / 921612
921612 ✓ 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: 3.2500 INCHES NOMINAL IN, bore_diameter: 8.1250 INCHES NOMINAL IN, overall_width: 4.0000 INCHES NOMINAL IN, standout_width: 0.3750 INCHES NOMINAL IN, special_features: OIL HOLE AND GROOVE IN CUP,WITH SPACER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-158-8449, 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
921612
NSN: 3110-00-158-8449
FSC: 3110
CAGE: 21444 — REXNORD INDUSTRIES LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width3.2500 INCHES NOMINAL IN
bore_diameter8.1250 INCHES NOMINAL IN
overall_width4.0000 INCHES NOMINAL IN
standout_width0.3750 INCHES NOMINAL IN
special_featuresOIL HOLE AND GROOVE IN CUP,WITH SPACER
style_designatorSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.0310 INCHES NOMINAL IN
overall_outside_diameter11.1250 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-158-8449
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 921612 · 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: 3.2500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES
•
MATERIAL: STEEL OVERALL
•
BACKFACE CORNER RADIUS: 0.0310 INCHES NOMINAL IN
•
BORE DIAMETER: 8.1250 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 (FLIS)
OVERALL WIDTH4.0000 INCHES NOMINAL IN
SPECIAL FEATURESOIL HOLE AND GROOVE IN CUP,WITH SPACER
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CUP WIDTH3.2500 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
MATERIALSTEEL OVERALL
BACKFACE CORNER RADIUS0.0310 INCHES NOMINAL IN
BORE DIAMETER8.1250 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER11.1250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
2159Interchangeable
interchangeable cross-reference
interchangeable
AN5743-2Interchangeable
interchangeable cross-reference
interchangeable
26-86010-001Interchangeable
interchangeable cross-reference
interchangeable
AN5743-1Interchangeable
interchangeable cross-reference
interchangeable
30458Interchangeable
interchangeable cross-reference
interchangeable
7713409Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 921612?
921612 is a BEARING,ROLLER,TAPERED.
What parts can replace 921612?
There are 18 known substitutes for 921612: 2159, AN5743-2, 26-86010-001 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 921612?
921612 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-158-8449. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026