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Technical Data Sheet
PartsTable / COMPONENT / R155
R155 ✓ 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 LOCK,VALVE SPRING RETAINER is a the manufacturer industrial component. Key specifications include material: STEEL, bore_shape: STRAIGHT, bore_diameter: 55.00 MILLIMETERS NOMINAL MM, overall_width: 21.00 MILLIMETERS NOMINAL MM, overall_height: 0.545 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN, surface_finish: GROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-7356, 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
R155
NSN: 3110-00-155-7356
FSC: 3110
CAGE: 80038 — EQUITABLE BEARING CO INC (USA)
SPECIFICATIONS
materialSTEEL
bore_shapeSTRAIGHT
bore_diameter55.00 MILLIMETERS NOMINAL MM
overall_width21.00 MILLIMETERS NOMINAL MM
overall_height0.545 INCHES MINIMUM AND 0.547 INCHES MAXIMUM IN
surface_finishGROUND
locating_featureNONLOCATING
special_featuresSIMULA TO STYLE 25 EXCEPT TAPERED BORE 2.500 PER FT TO COUNTERSINK; SPLINT IN THREE SECTIONS 120 DEG
style_designatorSTRAIGHT COUNTERSINK BORE-STRAIGHT SIDES
thread_provisionUNTHREADED
compressor_source11568
casehardening_indicatorCASEHARDENED
NSN3110-00-155-7356
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: R155 · 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
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
LOCATING FEATURE: NONLOCATING
•
STANDARD TOLERANCE DESIGNATION: RBEC NO.1
•
MATERIAL: STEEL INNER RING
•
STYLE DESIGNATOR: SINGLE ROW, NON-LOCATING, TWO LIP INNER RING, CYLINDRICAL OUTER RING, SEPARABLE
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH21.00 MILLIMETERS NOMINAL MM
INTERNAL FIT-UP DESIGNATIONSTANDARD
LOCATING FEATURENONLOCATING
STANDARD TOLERANCE DESIGNATIONRBEC NO.1
MATERIALSTEEL INNER RING
STYLE DESIGNATORSINGLE ROW, NON-LOCATING, TWO LIP INNER RING, CYLINDRICAL OUTER RING, SEPARABLE
MATERIALSTEEL ROLLER
MATERIALSTEEL OUTER RING
SURFACE FINISHGROUND
BORE SHAPESTRAIGHT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
208625Interchangeable
interchangeable cross-reference
interchangeable
A84143Interchangeable
interchangeable cross-reference
interchangeable
N430Interchangeable
interchangeable cross-reference
interchangeable
N436PC163Interchangeable
interchangeable cross-reference
interchangeable
N199PC163Interchangeable
interchangeable cross-reference
interchangeable
H224Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R155?
R155 is a LOCK,VALVE SPRING RETAINER.
What parts can replace R155?
There are 28 known substitutes for R155: 208625, A84143, N430 and 25 more. Substitute compatibility should be verified for your specific system.
Is R155 still available?
R155 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026