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20501PC129 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

20501PC129: 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: STEEL OVERALL, cup_width: 3.0000 INCHES NOMINAL IN, bore_diameter: 8.5000 INCHES NOMINAL IN, overall_width: 3.8750 INCHES NOMINAL IN, standout_width: 0.4375 INCHES NOMINAL IN, special_features: WITH CONE SPACER,0.0080 IN. END PLAY,DUTY CLASS LM SERIES,OIL HOLE AND GROOVE IN CUP IN.

This part is cataloged in the U.S. Government catalog under NSN 3110-00-078-9626, 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
20501PC129
NSN: 3110-00-078-9626
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 29899 — CALGON CARBON UV TECHNOLOGIES LLC DBA HYDE MARINE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width3.0000 INCHES NOMINAL IN
bore_diameter8.5000 INCHES NOMINAL IN
overall_width3.8750 INCHES NOMINAL IN
standout_width0.4375 INCHES NOMINAL IN
special_featuresWITH CONE SPACER,0.0080 IN. END PLAY,DUTY CLASS LM SERIES,OIL HOLE AND GROOVE IN CUP IN
style_designatorSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.0300 INCHES NOMINAL IN
overall_outside_diameter11.2500 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-078-9626
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 20501PC129 · 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: 3.0000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES
•
OVERALL OUTSIDE DIAMETER: 11.2500 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0300 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.4375 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
CUP WIDTH3.0000 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
OVERALL WIDTH3.8750 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER11.2500 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0300 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.4375 INCHES NOMINAL IN
SPECIAL FEATURESWITH CONE SPACER,0.0080 IN. END PLAY,DUTY CLASS LM SERIES,OIL HOLE AND GROOVE IN CUP IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER8.5000 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
LM742749LM742710DLM742749XASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20501PC129?
20501PC129 is a BEARING,ROLLER,TAPERED.
What parts can replace 20501PC129?
There is 1 known substitute for 20501PC129: LM742749LM742710DLM742749XA. Substitute compatibility should be verified for your specific system.
What is the NSN for 20501PC129?
20501PC129 is cataloged in the U.S. Government catalog under NSN 3110-00-078-9626. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
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.