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670305 — BEARING,BALL,DUPLEX

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

670305: BEARING,BALL,DUPLEX.

The BEARING,BALL,DUPLEX is a the manufacturer industrial component. Key specifications include special_features: UNIT PACKAGE QTY, 5;UNIT PACKAGE TYPE BOX. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-185-4039, 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
670305
NSN: 3110-00-185-4039
NIINs: 001854039, 014895568
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
special_featuresUNIT PACKAGE QTY, 5;UNIT PACKAGE TYPE BOX
NSN3110-00-185-4039
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 670305 · 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
•
INTERNAL CLEARANCE: 0.0007 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN
•
SURFACE FINISH: GROUND
•
SHIELD QUANTITY: 1
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE, TANDEM MOUNTING
•
OVERALL OUTSIDE DIAMETER: 0.8750 INCHES NOMINAL IN
•
LOAD DIRECTION: RADIAL
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.5
TECHNICAL CHARACTERISTICS
INTERNAL CLEARANCE0.0007 INCHES MINIMUM RADIAL AND 0.0012 INCHES MAXIMUM RADIAL IN
SURFACE FINISHGROUND
SHIELD QUANTITY1
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE, TANDEM MOUNTING
OVERALL WIDTH0.5624 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER0.8750 INCHES NOMINAL IN
LOAD DIRECTIONRADIAL
STANDARD TOLERANCE DESIGNATIONABEC NO.5
BORE DIAMETER0.3750 INCHES NOMINAL IN
MATERIALSTEEL COMP 440C INNER RING
SUBSTITUTES & CROSS-REFERENCES 1
2184287Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 670305?
670305 is a BEARING,BALL,DUPLEX.
What parts can replace 670305?
There is 1 known substitute for 670305: 2184287. Substitute compatibility should be verified for your specific system.
What is the NSN for 670305?
670305 is cataloged in the U.S. Government catalog under NSN 3110-00-185-4039. 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.