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Technical Data Sheet
PartsTable / COMPONENT / P637-3
P637-3 ✓ 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, overall_width: 1.406 INCHES NOMINAL IN, inclosure_type: PARTIALLY INCLOSED, DOUBLE SHELL, overall_height: 1.625 INCHES NOMINAL IN, overall_length: 2.875 INCHES NOMINAL IN, mounting_method: UNTHREADED HOLE(S) SINGLE GROUP. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-278-7548, 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
P637-3
NSN: 3110-00-278-7548
FSC: 3110
CAGE: 8E499 — KOEHRING CRANES AND EXCAVATORS INC SUB OF NORTHWEST ENGINEERING CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width1.406 INCHES NOMINAL IN
inclosure_typePARTIALLY INCLOSED, DOUBLE SHELL
overall_height1.625 INCHES NOMINAL IN
overall_length2.875 INCHES NOMINAL IN
mounting_methodUNTHREADED HOLE(S) SINGLE GROUP
frequency_rating50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL SINGLE COMPONENT
outside_diameter7.1875 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
reliability_indicatorNOT ESTABLISHED
backface_corner_radius0.1250 INCHES NOMINAL IN
mounting_hole_diameter0.188 INCHES NOMINAL SINGLE GROUP IN
NSN3110-00-278-7548
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: P637-3 · 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
•
BACKFACE CORNER RADIUS: 0.1250 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
STYLE DESIGNATOR: NORMAL ANGLE
•
MATERIAL: STEEL OVERALL
•
OUTSIDE DIAMETER: 7.1875 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 (FLIS)
OVERALL WIDTH1.3125 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
STYLE DESIGNATORNORMAL ANGLE
MATERIALSTEEL OVERALL
OUTSIDE DIAMETER7.1875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
348220Interchangeable
interchangeable cross-reference
interchangeable
48EInterchangeable
interchangeable cross-reference
interchangeable
EN18-61Interchangeable
interchangeable cross-reference
interchangeable
97623Interchangeable
interchangeable cross-reference
interchangeable
48290-20629Interchangeable
interchangeable cross-reference
interchangeable
722173Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is P637-3?
P637-3 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace P637-3?
There are 20 known substitutes for P637-3: 348220, 48E, EN18-61 and 17 more. Substitute compatibility should be verified for your specific system.
Is P637-3 still available?
P637-3 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