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Technical Data Sheet
PartsTable / COMPONENT / IR9728C1
IR9728C1 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include bore_shape: STRAIGHT, bore_diameter: 3.7492 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN, overall_width: 2.0050 INCHES MINIMUM AND 2.0100 INCHES MAXIMUM IN, surface_finish: GROUND, special_features: 1 TO 4 OIL HOLES,OIL GROOVE OPTIONIAL, style_designator: SOLID INNER RACE, JOURNAL AND NEEDLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-151-8514, 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
IR9728C1
NSN: 3110-00-151-8514
FSC: 3110
CAGE: 51588 — RBC BEARINGS INCORPORATED DIV WEST TRENTON DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP E4340H OR STEEL COMP 4720 OR STEEL COMP 8620 OR STEEL COMP 8720 OR STEEL COMP 1018 OR STEEL COMP 1117 OR STEEL COMP E51100 OR STEEL COMP E52100 OR STEEL COMP 1022 OVERALL
bore_shapeSTRAIGHT
bore_diameter3.7492 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN
overall_width2.0050 INCHES MINIMUM AND 2.0100 INCHES MAXIMUM IN
surface_finishGROUND
special_features1 TO 4 OIL HOLES,OIL GROOVE OPTIONIAL
style_designatorSOLID INNER RACE, JOURNAL AND NEEDLE
overall_outside_diameter4.2476 INCHES MINIMUM AND 4.2485 INCHES MAXIMUM IN
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
NSN3110-00-151-8514
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: IR9728C1 · 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
•
BORE SHAPE: STRAIGHT
•
SURFACE FINISH: GROUND
•
BORE DIAMETER: 3.7492 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
•
OVERALL OUTSIDE DIAMETER: 4.2476 INCHES MINIMUM AND 4.2485 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID INNER RACE, JOURNAL AND NEEDLE
TECHNICAL CHARACTERISTICS (FLIS)
BORE SHAPESTRAIGHT
OVERALL WIDTH2.0050 INCHES MINIMUM AND 2.0100 INCHES MAXIMUM IN
SPECIAL FEATURES1 TO 4 OIL HOLES,OIL GROOVE OPTIONIAL
SURFACE FINISHGROUND
BORE DIAMETER3.7492 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
OVERALL OUTSIDE DIAMETER4.2476 INCHES MINIMUM AND 4.2485 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID INNER RACE, JOURNAL AND NEEDLE
MATERIALSTEEL COMP E4340H OR STEEL COMP 4720 OR STEEL COMP 8620 OR STEEL COMP 8720 OR STEEL COMP 1018 OR STEEL COMP 1117 OR STEEL COMP E51100 OR STEEL COMP E52100 OR STEEL COMP 1022 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
PL-E185E001 PIECE 71Interchangeable
interchangeable cross-reference
interchangeable
IR263220Interchangeable
interchangeable cross-reference
interchangeable
MI26Interchangeable
interchangeable cross-reference
interchangeable
MI38Interchangeable
interchangeable cross-reference
interchangeable
M1-38Interchangeable
interchangeable cross-reference
interchangeable
27765Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is IR9728C1?
IR9728C1 is a RELAY,ELECTROMAGNETIC.
What parts can replace IR9728C1?
There are 15 known substitutes for IR9728C1: PL-E185E001 PIECE 71, IR263220, MI26 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for IR9728C1?
IR9728C1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-151-8514. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026