PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 255-78
255-78 ✓ 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

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include material: ALUMINUM OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-3540, 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
255-78
NSN: 3110-00-100-3540
FSC: 3110
CAGE: 61220 — TYSON BEARING CO DIV SKF INDUSTRIES INC (USA)
SPECIFICATIONS
materialALUMINUM OVERALL
blade_quantity6
NSN3110-00-100-3540
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 255-78 · 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
•
STYLE DESIGNATOR: NORMAL ANGLE
•
CONE WIDTH: 1.0000 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.0900 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BORE DIAMETER: 1.6875 INCHES NOMINAL IN
•
MATERIAL: STEEL 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)
STYLE DESIGNATORNORMAL ANGLE
CONE WIDTH1.0000 INCHES NOMINAL IN
CONE CORNER RADIUS0.0900 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER1.6875 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
ASME B94.19Interchangeable
interchangeable cross-reference
interchangeable
M114Interchangeable
interchangeable cross-reference
interchangeable
GGG-C-755Interchangeable
interchangeable cross-reference
interchangeable
043-1047-20Interchangeable
interchangeable cross-reference
interchangeable
32.710Interchangeable
interchangeable cross-reference
interchangeable
TC-28Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 255-78?
255-78 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace 255-78?
There are 24 known substitutes for 255-78: ASME B94.19, M114, GGG-C-755 and 21 more. Substitute compatibility should be verified for your specific system.
Is 255-78 still available?
255-78 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