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Technical Data Sheet
PartsTable / COMPONENT / 52878
52878 ✓ Verified by PartsTable
Clementoni · 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

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include material: STEEL OVERALL, head_style: HEXAGON COUNTERSUNK, thread_class: 2A A, thread_length: 0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN, hardness_rating: 77.0 ROCKWELL SUPERFICIAL 15-N NOMINAL OVERALL, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-3690, 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
52878
NSN: 3110-00-100-3690
FSC: 3110
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON COUNTERSUNK
thread_class2A A
thread_length0.850 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
hardness_rating77.0 ROCKWELL SUPERFICIAL 15-N NOMINAL OVERALL
thread_directionRIGHT-HAND
countersink_angle60.0 DEGREES NOMINAL
features_providedCASEHARDENED AND FINISHED HEAD
surface_treatmentCADMIUM AND CHROMATE OR ZINC AND CHROMATE OVERALL
width_between_flats0.800 INCHES MINIMUM AND 0.813 INCHES MAXIMUM IN
nominal_thread_diameter0.500 INCHES IN
thread_quantity_per_inch20
NSN3110-00-100-3690
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 52878 · Clementoni ⚠ 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
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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 29
2872Interchangeable
interchangeable cross-reference
interchangeable
08-49003-55Interchangeable
interchangeable cross-reference
interchangeable
4171306-373Interchangeable
interchangeable cross-reference
interchangeable
15KPM5PCT1-2WInterchangeable
interchangeable cross-reference
interchangeable
48010Interchangeable
interchangeable cross-reference
interchangeable
5940001434780Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 52878?
52878 is a CONE AND ROLLERS,TAPERED ROLLER manufactured by Clementoni.
What parts can replace 52878?
There are 29 known substitutes for 52878: 2872, 08-49003-55, 4171306-373 and 26 more. Substitute compatibility should be verified for your specific system.
Is 52878 still available?
52878 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