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1278-19 — CONE AND ROLLERS,TAPERED ROLLER

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

1278-19: CONE AND ROLLERS,TAPERED ROLLER.

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include material: ALUMINUM ALLOY 5005 FILTERING MEDIUM, design_type: NONREUSABLE, overall_width: 10.250 INCHES NOMINAL IN, body_thickness: 0.250 INCHES NOMINAL IN, special_features: 100 MICRON, style_designator: RECTANGULAR (INCL SQUARE). This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-3632, 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
1278-19
NSN: 3110-00-100-3632
NIINs: 001003632, 015347680
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 77237 — DANA OFF HIGHWAY PRODUCTS, LLC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 5005 FILTERING MEDIUM
design_typeNONREUSABLE
overall_width10.250 INCHES NOMINAL IN
body_thickness0.250 INCHES NOMINAL IN
special_features100 MICRON
style_designatorRECTANGULAR (INCL SQUARE)
body_overall_length6.250 INCHES NOMINAL IN
end_item_identificationESTS BLOWER
criticality_code_justificationFEAT
part_name_assigned_by_controlling_agencyFILTER, BLOWER
NSN3110-00-100-3632
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 1278-19 · 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 CORNER RADIUS: 0.1406 INCHES NOMINAL IN
•
CONE WIDTH: 1.4375 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BORE DIAMETER: 4.2500 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
STYLE DESIGNATORNORMAL ANGLE
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
CONE WIDTH1.4375 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER4.2500 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 9
D31129Reference document
Same NSN cross-reference
Reference document — Secondary reference
7EQH4221Reference document
Same NSN cross-reference
Reference document — Secondary reference
774025Reference document
Same NSN cross-reference
Reference document — Secondary reference
5230427817Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
149448Reference document
Same NSN cross-reference
Reference document — Secondary reference
LA492-22Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1278-19?
1278-19 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace 1278-19?
There are 9 known substitutes for 1278-19: D31129, 7EQH4221, 774025 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1278-19?
1278-19 is cataloged in the U.S. Government catalog under NSN 3110-00-100-3632. 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.