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Technical Data Sheet
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31SP33 — Technical Data Sheet

✓ 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: STEEL OVERALL, cone_width: 1.8125 INCHES NOMINAL IN, bore_diameter: 2.6875 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, cone_corner_radius: 0.1400 INCHES NOMINAL IN, standard_tolerance_designation: AFBMA CLASS 2. This part is cataloged in the Federal Logistics Information System under NSN 3110-00-927-4159, 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
31SP33
NSN: 3110-00-927-4159
FSC: 3110
CAGE: 89619 — MACK TRUCKS, INC. DBA MACUNGIE OPERATIONS DIV LEHIGH VALLEY OPERATIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cone_width1.8125 INCHES NOMINAL IN
bore_diameter2.6875 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
cone_corner_radius0.1400 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-927-4159
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 31SP33 · 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
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
MATERIAL: STEEL OVERALL
•
BORE DIAMETER: 2.6875 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
CONE WIDTH: 1.8125 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
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
MATERIALSTEEL OVERALL
BORE DIAMETER2.6875 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
CONE WIDTH1.8125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
88164-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
38826InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
42532InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
79490SA ITEM 20InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
079481InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
79490SAInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31SP33?
31SP33 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace 31SP33?
There are 18 known substitutes for 31SP33: 88164-1, 38826, 42532 and 15 more. Substitute compatibility should be verified for your specific system.
Is 31SP33 still available?
31SP33 is currently cancelled.
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Last verified: October 2026