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Technical Data Sheet
PartsTable / COMPONENT / 178021H1
178021H1 ✓ 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,ROLLER,CYLINDRICAL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, bore_diameter: 45.0 MILLIMETERS NOMINAL MM, overall_width: 25.0 MILLIMETERS NOMINAL MM, surface_finish: GROUND, locating_feature: NONLOCATING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-7343, 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
178021H1
NSN: 3110-00-100-7343
FSC: 3110
CAGE: 29510 — KOMATSU AMERICAN INTL CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter45.0 MILLIMETERS NOMINAL MM
overall_width25.0 MILLIMETERS NOMINAL MM
surface_finishGROUND
locating_featureNONLOCATING
style_designatorSINGLE ROW, NON-LOCATING, TWO LIP INNER RING, CYLINDRICAL OUTER RING WITH TWO ROLLER RETAINMENT RINGS ON OUTER, NON-SEPARABLE
overall_outside_diameter100.0 MILLIMETERS NOMINAL MM
internal_fit-up_designationSTANDARD
standard_tolerance_designationRBEC NO.1
material_document_and_classificationQQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN3110-00-100-7343
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 178021H1 · 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: SINGLE ROW, NON-LOCATING, TWO LIP INNER RING, CYLINDRICAL OUTER RING WITH TWO ROLLER RETAINMENT RINGS ON OUTER, NON-SEPARABLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
SURFACE FINISH: GROUND
•
MATERIAL: STEEL OVERALL
•
STANDARD TOLERANCE DESIGNATION: RBEC NO.1
•
OVERALL OUTSIDE DIAMETER: 100.0 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH25.0 MILLIMETERS NOMINAL MM
STYLE DESIGNATORSINGLE ROW, NON-LOCATING, TWO LIP INNER RING, CYLINDRICAL OUTER RING WITH TWO ROLLER RETAINMENT RINGS ON OUTER, NON-SEPARABLE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
INTERNAL FIT-UP DESIGNATIONSTANDARD
SURFACE FINISHGROUND
MATERIALSTEEL OVERALL
STANDARD TOLERANCE DESIGNATIONRBEC NO.1
OVERALL OUTSIDE DIAMETER100.0 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
BORE DIAMETER45.0 MILLIMETERS NOMINAL MM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
62FT1Interchangeable
interchangeable cross-reference
interchangeable
230384Interchangeable
interchangeable cross-reference
interchangeable
72-6970-794Interchangeable
interchangeable cross-reference
interchangeable
U-1313-EInterchangeable
interchangeable cross-reference
interchangeable
27611Interchangeable
interchangeable cross-reference
interchangeable
A430-061369-01Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 178021H1?
178021H1 is a BEARING,ROLLER,CYLINDRICAL.
What parts can replace 178021H1?
There are 19 known substitutes for 178021H1: 62FT1, 230384, 72-6970-794 and 16 more. Substitute compatibility should be verified for your specific system.
Is 178021H1 still available?
178021H1 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