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Technical Data Sheet
PartsTable / COMPONENT / 503566
503566 ✓ 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 BEARING,ROLLER,CYLINDRICAL is a the manufacturer industrial component. Key specifications include material: STEEL OUTER RING, bore_shape: STRAIGHT, bore_diameter: 3.7399 INCHES MINIMUM AND 3.7402 INCHES MAXIMUM IN, surface_finish: GROUND, inner_ring_width: 1.0024 INCHES MINIMUM AND 1.0074 INCHES MAXIMUM IN, locating_feature: NONLOCATING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-878-6309, 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
503566
NSN: 3110-00-878-6309
FSC: 3110
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL OUTER RING
bore_shapeSTRAIGHT
bore_diameter3.7399 INCHES MINIMUM AND 3.7402 INCHES MAXIMUM IN
surface_finishGROUND
inner_ring_width1.0024 INCHES MINIMUM AND 1.0074 INCHES MAXIMUM IN
locating_featureNONLOCATING
outer_ring_width0.9399 INCHES MINIMUM AND 0.9449 INCHES MAXIMUM IN
internal_clearance0.0018 INCHES MINIMUM RADIAL AND 0.0025 INCHES MAXIMUM RADIAL IN
overall_outside_diameter5.3146 INCHES MINIMUM AND 5.3150 INCHES MAXIMUM IN
retainer_fabrication_methodMACHINED
standard_tolerance_designationRBEC NO.5
material_document_and_classificationPWA-725,97497 MFR REF 3RD MATERIAL RESPONSE ROLLER
NSN3110-00-878-6309
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 503566 · 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
•
INTERNAL CLEARANCE: 0.0018 INCHES MINIMUM RADIAL AND 0.0025 INCHES MAXIMUM RADIAL IN
•
BORE DIAMETER: 3.7399 INCHES MINIMUM AND 3.7402 INCHES MAXIMUM IN
•
MATERIAL: STEEL ROLLER
•
MATERIAL DOCUMENT AND CLASSIFICATION: PWA-725,97497 MFR REF 1ST MATERIAL RESPONSE INNER RING
•
OUTER RING WIDTH: 0.9399 INCHES MINIMUM AND 0.9449 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE FINISHGROUND
INTERNAL CLEARANCE0.0018 INCHES MINIMUM RADIAL AND 0.0025 INCHES MAXIMUM RADIAL IN
BORE DIAMETER3.7399 INCHES MINIMUM AND 3.7402 INCHES MAXIMUM IN
MATERIALSTEEL ROLLER
MATERIAL DOCUMENT AND CLASSIFICATIONPWA-725,97497 MFR REF 1ST MATERIAL RESPONSE INNER RING
MATERIAL DOCUMENT AND CLASSIFICATIONPWA-725,97497 MFR REF 2ND MATERIAL RESPONSE OUTER RING
MATERIALSTEEL INNER RING
OUTER RING WIDTH0.9399 INCHES MINIMUM AND 0.9449 INCHES MAXIMUM IN
INNER RING WIDTH1.0024 INCHES MINIMUM AND 1.0074 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONPWA-725,97497 MFR REF 3RD MATERIAL RESPONSE ROLLER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
187B1Interchangeable
interchangeable cross-reference
interchangeable
6101792Interchangeable
interchangeable cross-reference
interchangeable
A18442-7Interchangeable
interchangeable cross-reference
interchangeable
503567Interchangeable
interchangeable cross-reference
interchangeable
20X19Interchangeable
interchangeable cross-reference
interchangeable
4A3491Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 503566?
503566 is a BEARING,ROLLER,CYLINDRICAL.
What parts can replace 503566?
There are 9 known substitutes for 503566: 187B1, 6101792, A18442-7 and 6 more. Substitute compatibility should be verified for your specific system.
Is 503566 still available?
503566 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