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Technical Data Sheet
PartsTable / COMPONENT / 921301
921301 ✓ 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 COMP 4320 OR STEEL COMP 4620 OR STEEL COMP 8620 OR STEEL COMP E52100 OVERALL, cup_width: 1.2500 INCHES NOMINAL IN, cone_width: 1.6250 INCHES NOMINAL IN, bore_diameter: 2.2500 INCHES NOMINAL IN, overall_width: 1.6250 INCHES NOMINAL IN, standout_width: 0.3750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-4226, 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
921301
NSN: 3110-00-100-4226
FSC: 3110
CAGE: 21444 — REXNORD INDUSTRIES LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 4320 OR STEEL COMP 4620 OR STEEL COMP 8620 OR STEEL COMP E52100 OVERALL
cup_width1.2500 INCHES NOMINAL IN
cone_width1.6250 INCHES NOMINAL IN
bore_diameter2.2500 INCHES NOMINAL IN
overall_width1.6250 INCHES NOMINAL IN
standout_width0.3750 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.1250 INCHES NOMINAL IN
overall_outside_diameter4.7500 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-4226
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 921301 · 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
•
CUP WIDTH: 1.2500 INCHES NOMINAL IN
•
OVERALL OUTSIDE DIAMETER: 4.7500 INCHES NOMINAL IN
•
CONE WIDTH: 1.6250 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.3750 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 4320 OR STEEL COMP 4620 OR STEEL COMP 8620 OR STEEL COMP E52100 OVERALL
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)
CUP WIDTH1.2500 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER4.7500 INCHES NOMINAL IN
CONE WIDTH1.6250 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.3750 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
MATERIALSTEEL COMP 4320 OR STEEL COMP 4620 OR STEEL COMP 8620 OR STEEL COMP E52100 OVERALL
OVERALL WIDTH1.6250 INCHES NOMINAL IN
BORE DIAMETER2.2500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
BT363Interchangeable
interchangeable cross-reference
interchangeable
363Interchangeable
interchangeable cross-reference
interchangeable
372AInterchangeable
interchangeable cross-reference
interchangeable
94289Interchangeable
interchangeable cross-reference
interchangeable
5520Interchangeable
interchangeable cross-reference
interchangeable
BT5520Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 921301?
921301 is a BEARING,ROLLER,TAPERED.
What parts can replace 921301?
There are 28 known substitutes for 921301: BT363, 363, 372A and 25 more. Substitute compatibility should be verified for your specific system.
Is 921301 still available?
921301 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