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Technical Data Sheet
PartsTable / COMPONENT / 637440
637440 ✓ 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

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: PAPER AND GLUE OVERALL, overall_width: 2.750 INCHES NOMINAL IN, overall_length: 5.368 INCHES NOMINAL IN, cross-sectional_thickness: 0.031 INCHES NOMINAL IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION, material_document_and_classification: MIL-G-12803,NO. +3313-B MIL SPEC ALL MATERIAL RESPONSES OVERALL.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-9552, 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
637440
NSN: 3110-00-155-9552
FSC: 3110
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialPAPER AND GLUE OVERALL
overall_width2.750 INCHES NOMINAL IN
overall_length5.368 INCHES NOMINAL IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-G-12803,NO. +3313-B MIL SPEC ALL MATERIAL RESPONSES OVERALL
NSN3110-00-155-9552
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 637440 · 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
•
INNER RING WIDTH: 1.0000 INCHES NOMINAL IN
•
MATERIAL: STEEL BALL
•
BORE SHAPE: STRAIGHT
•
STYLE DESIGNATOR: LOADING GROOVE, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 62.00 MILLIMETERS NOMINAL MM
•
SURFACE FINISH: GROUND
TECHNICAL CHARACTERISTICS (FLIS)
INNER RING WIDTH1.0000 INCHES NOMINAL IN
MATERIALSTEEL BALL
BORE SHAPESTRAIGHT
MATERIALSTEEL OUTER RING
MATERIALSTEEL INNER RING
STYLE DESIGNATORLOADING GROOVE, NON-SEPARABLE
OVERALL OUTSIDE DIAMETER62.00 MILLIMETERS NOMINAL MM
SURFACE FINISHGROUND
STANDARD TOLERANCE DESIGNATIONABEC NO.1
BORE DIAMETER25.00 MILLIMETERS NOMINAL MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
74-7065Interchangeable
interchangeable cross-reference
interchangeable
T41305Interchangeable
interchangeable cross-reference
interchangeable
43305GInterchangeable
interchangeable cross-reference
interchangeable
4305Interchangeable
interchangeable cross-reference
interchangeable
SF-70#3Interchangeable
interchangeable cross-reference
interchangeable
FFB171Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 637440?
637440 is a BEARING,BALL,ANNULAR.
What parts can replace 637440?
There are 27 known substitutes for 637440: 74-7065, T41305, 43305G and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 637440?
637440 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-9552. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026