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IR1820-OH — RING,BEARING,INNER

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

IR1820-OH: RING,BEARING,INNER.

The RING,BEARING,INNER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, bore_diameter: 1.1245 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN, overall_width: 1.2550 INCHES MINIMUM AND 1.2650 INCHES MAXIMUM IN, surface_finish: GROUND, special_features: OIL HOLE THRU CENTER OF RING. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-009-6765, 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
IR1820-OH
NSN: 3110-01-009-6765
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter1.1245 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
overall_width1.2550 INCHES MINIMUM AND 1.2650 INCHES MAXIMUM IN
surface_finishGROUND
special_featuresOIL HOLE THRU CENTER OF RING
style_designatorSOLID INNER RACE, WITH BORE CHAMFER, JOURNAL AND NEEDLE
overall_outside_diameter1.3745 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
NSN3110-01-009-6765
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: IR1820-OH · 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
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: SOLID INNER RACE, WITH BORE CHAMFER, JOURNAL AND NEEDLE
•
OVERALL OUTSIDE DIAMETER: 1.3745 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
•
BORE SHAPE: STRAIGHT
•
BORE DIAMETER: 1.1245 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISHGROUND
STYLE DESIGNATORSOLID INNER RACE, WITH BORE CHAMFER, JOURNAL AND NEEDLE
OVERALL WIDTH1.2550 INCHES MINIMUM AND 1.2650 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER1.3745 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
BORE SHAPESTRAIGHT
SPECIAL FEATURESOIL HOLE THRU CENTER OF RING
BORE DIAMETER1.1245 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
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
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is IR1820-OH?
IR1820-OH is a RING,BEARING,INNER.
What is the NSN for IR1820-OH?
IR1820-OH is cataloged in the U.S. Government catalog under NSN 3110-01-009-6765. 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.