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1X138 — BEARING,BULLGEAR THRUST

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

1X138: BEARING,BULLGEAR THRUST.

The BEARING,BULLGEAR THRUST is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: FOR INGERSOLL-RAND CENTAC CENTRIFUGAL AIR COMPRESSOR MDL C21M4; STEEL BALLS,ANTI FRICTION BEARING. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-371-7375, 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
1X138
NSN: 3110-01-371-7375
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 66617 — INGERSOLL-RANDCOMPANY (USA)
SPECIFICATIONS
general_characteristics_item_descriptionFOR INGERSOLL-RAND CENTAC CENTRIFUGAL AIR COMPRESSOR MDL C21M4; STEEL BALLS,ANTI FRICTION BEARING
NSN3110-01-371-7375
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 1X138 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: FOR INGERSOLL-RAND CENTAC CENTRIFUGAL AIR COMPRESSOR MDL C21M4; STEEL BALLS,ANTI FRICTION BEARING
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONFOR INGERSOLL-RAND CENTAC CENTRIFUGAL AIR COMPRESSOR MDL C21M4; STEEL BALLS,ANTI FRICTION BEARING
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1X138?
1X138 is a BEARING,BULLGEAR THRUST.
What is the NSN for 1X138?
1X138 is cataloged in the U.S. Government catalog under NSN 3110-01-371-7375. 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.