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Technical Data Sheet
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WS8 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The BEARING,PLAIN,SELF-ALIGNING is a the manufacturer industrial component. Key specifications include material: STEEL COMP E52100 INNER MEMBER, bore_diameter: 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN, style_designator: WITHOUT INSERT OR LINER, surface_treatment: CHROMIUM INNER MEMBER, inner_member_width: 0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN, outer_member_width: 0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-661-7205, 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
WS8
NSN: 3120-00-661-7205
FSC: 3120
CAGE: 73134 — ROLLER BEARING COMPANY OF AMERICA, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP E52100 INNER MEMBER
bore_diameter0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
style_designatorWITHOUT INSERT OR LINER
surface_treatmentCHROMIUM INNER MEMBER
inner_member_width0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
outer_member_width0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
lubrication_featureGROOVE INTERNAL OUTER MEMBER
outer_member_outside_diameter0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
general_characteristics_item_descriptionSUBCOMPONENT OF AMPHENOL COAXIAL TRIM KIT
NSN3120-00-661-7205
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: WS8 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
BORE DIAMETER: 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
•
OUTER MEMBER WIDTH: 0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
•
LUBRICATION FEATURE: GROOVE INTERNAL OUTER MEMBER
•
STYLE DESIGNATOR: WITHOUT INSERT OR LINER
•
SURFACE TREATMENT: CHROMIUM INNER MEMBER
•
MATERIAL: STEEL CORROSION RESISTING OUTER RACE MEMBER
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
OUTER MEMBER WIDTH0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
LUBRICATION FEATUREGROOVE INTERNAL OUTER MEMBER
LUBRICATION FEATUREGROOVE EXTERNAL OUTER MEMBER
STYLE DESIGNATORWITHOUT INSERT OR LINER
SURFACE TREATMENTCHROMIUM INNER MEMBER
MATERIALSTEEL CORROSION RESISTING OUTER RACE MEMBER
LUBRICATION FEATUREPERFORATION OUTER RACE MEMBER
MATERIALSTEEL COMP E52100 INNER MEMBER
INNER MEMBER WIDTH0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
Q2-2Interchangeable
interchangeable cross-reference
interchangeable
536052Interchangeable
interchangeable cross-reference
interchangeable
DQ2B2Interchangeable
interchangeable cross-reference
interchangeable
WS-8Interchangeable
interchangeable cross-reference
interchangeable
901-3Interchangeable
interchangeable cross-reference
interchangeable
KWB8SSGMILG3278Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is WS8?
WS8 is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace WS8?
There are 7 known substitutes for WS8: Q2-2, 536052, DQ2B2 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for WS8?
WS8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-661-7205. 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