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ER2 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

ER2: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL RETAINER, bore_shape: STRAIGHT, bore_diameter: 1.2500 INCHES MINIMUM AND 1.2505 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND, inner_ring_width: 1.6830 INCHES MINIMUM AND 1.6880 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-271-0208, 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
ER2
NSN: 3110-00-271-0208
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 57448 — STEPHENS-ADAMSON INC A SUB OF ALLIS-CHALMERS CORP (USA)
SPECIFICATIONS
materialSTEEL RETAINER
bore_shapeSTRAIGHT
bore_diameter1.2500 INCHES MINIMUM AND 1.2505 INCHES MAXIMUM IN
seal_quantity2
load_directionRADIAL
surface_finishGROUND
inner_ring_width1.6830 INCHES MINIMUM AND 1.6880 INCHES MAXIMUM IN
outer_ring_width0.9375 INCHES NOMINAL IN
special_featuresOIL HOLE AND GROOVE IN OUTER RING
style_designatorSINGLE ROW BALL, NOT SELF-ALIGNING, INNER RING EXTENDS BOTH SIDES, WITH SETSCREW IN INNER RING, GREASE GROOVE AND SNAP RING ON OUTER RING
bearing_seal_typeLABYRINTH
features_providedSNAP RING-GROOVE MOUNTING AND MOUNTING GROOVE
NSN3110-00-271-0208
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: ER2 · 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
•
BEARING SEAL TYPE: LABYRINTH
•
LUBRICATION MATERIAL: GREASE
•
OUTER RING WIDTH: 0.9375 INCHES NOMINAL IN
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: SINGLE ROW BALL, NOT SELF-ALIGNING, INNER RING EXTENDS BOTH SIDES, WITH SETSCREW IN INNER RING, GREASE GROOVE AND SNAP RING ON OUTER RING
•
OVERALL OUTSIDE DIAMETER: 2.8340 INCHES MINIMUM AND 2.8346 INCHES MAXIMUM IN
•
FEATURES PROVIDED: SNAP RING-GROOVE MOUNTING AND MOUNTING GROOVE
TECHNICAL CHARACTERISTICS
BEARING SEAL TYPELABYRINTH
LUBRICATION MATERIALGREASE
OUTER RING WIDTH0.9375 INCHES NOMINAL IN
INTERNAL FIT-UP DESIGNATIONSTANDARD
SURFACE FINISHGROUND
STYLE DESIGNATORSINGLE ROW BALL, NOT SELF-ALIGNING, INNER RING EXTENDS BOTH SIDES, WITH SETSCREW IN INNER RING, GREASE GROOVE AND SNAP RING ON OUTER RING
OVERALL OUTSIDE DIAMETER2.8340 INCHES MINIMUM AND 2.8346 INCHES MAXIMUM IN
FEATURES PROVIDEDSNAP RING-GROOVE MOUNTING AND MOUNTING GROOVE
BORE SHAPESTRAIGHT
LOAD DIRECTIONRADIAL
SUBSTITUTES & CROSS-REFERENCES 2
ER20Reference document
Same NSN cross-reference
Reference document — Secondary reference
559391Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ER2?
ER2 is a BEARING,BALL,ANNULAR.
What parts can replace ER2?
There are 2 known substitutes for ER2: ER20, 559391. Substitute compatibility should be verified for your specific system.
What is the NSN for ER2?
ER2 is cataloged in the U.S. Government catalog under NSN 3110-00-271-0208. This indicates validated use in U.S. government and defense supply chains.
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