PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 644-632
644-632 ✓ 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: 1.2500 INCHES NOMINAL IN, cone_width: 1.6250 INCHES NOMINAL IN, bore_diameter: 2.8125 INCHES NOMINAL IN, overall_width: 1.6250 INCHES NOMINAL IN, standout_width: 0.3750 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-4239, 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
644-632
NSN: 3110-00-100-4239
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.2500 INCHES NOMINAL IN
cone_width1.6250 INCHES NOMINAL IN
bore_diameter2.8125 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_diameter5.3750 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-4239
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 644-632 · 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
•
OVERALL OUTSIDE DIAMETER: 5.3750 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
CUP WIDTH: 1.2500 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
STANDOUT WIDTH: 0.3750 INCHES NOMINAL IN
•
CONE WIDTH: 1.6250 INCHES NOMINAL IN
•
BORE DIAMETER: 2.8125 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 OUTSIDE DIAMETER5.3750 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
CUP WIDTH1.2500 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OVERALL WIDTH1.6250 INCHES NOMINAL IN
STANDOUT WIDTH0.3750 INCHES NOMINAL IN
CONE WIDTH1.6250 INCHES NOMINAL IN
BORE DIAMETER2.8125 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
A-A-59649BInterchangeable
interchangeable cross-reference
interchangeable
13889-13830Interchangeable
interchangeable cross-reference
interchangeable
11592012Interchangeable
interchangeable cross-reference
interchangeable
570GInterchangeable
interchangeable cross-reference
interchangeable
0260724Interchangeable
interchangeable cross-reference
interchangeable
5706XInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 644-632?
644-632 is a BEARING,ROLLER,TAPERED.
What parts can replace 644-632?
There are 19 known substitutes for 644-632: A-A-59649B, 13889-13830, 11592012 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 644-632?
644-632 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-4239. 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