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Technical Data Sheet
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QB42591 — ROLLER,BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

QB42591: ROLLER,BEARING.

The ROLLER,BEARING is a the manufacturer industrial component. Key specifications include overall_length: 2.0000 INCHES NOMINAL IN, style_designator: CYLINDRICAL ROLLER, SPHERICAL ENDS, rolling_element_diameter: 0.5000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-080-9566, 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
QB42591
NSN: 3110-01-080-9566
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
overall_length2.0000 INCHES NOMINAL IN
style_designatorCYLINDRICAL ROLLER, SPHERICAL ENDS
rolling_element_diameter0.5000 INCHES NOMINAL IN
NSN3110-01-080-9566
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: QB42591 · 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
•
ROLLING ELEMENT DIAMETER: 0.5000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CYLINDRICAL ROLLER, SPHERICAL ENDS
TECHNICAL CHARACTERISTICS
ROLLING ELEMENT DIAMETER0.5000 INCHES NOMINAL IN
STYLE DESIGNATORCYLINDRICAL ROLLER, SPHERICAL ENDS
OVERALL LENGTH2.0000 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 5
030902-AIDReference document
Same NSN cross-reference
Reference document — Secondary reference
12267663Reference document
Same NSN cross-reference
Reference document — Secondary reference
03092Reference document
Same NSN cross-reference
Reference document — Secondary reference
030902Reference document
Same NSN cross-reference
Reference document — Secondary reference
DAX11348Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is QB42591?
QB42591 is a ROLLER,BEARING.
What parts can replace QB42591?
There are 5 known substitutes for QB42591: 030902-AID, 12267663, 03092 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for QB42591?
QB42591 is cataloged in the U.S. Government catalog under NSN 3110-01-080-9566. 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.