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Technical Data Sheet
PartsTable / COMPONENT / 55206
55206 ✓ Verified by PartsTable
Legrand · 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

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include diameter: 0.623 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN, material: COPPER, construction: SEAMLESS, heat_treatment: ANNEALED TO A NOMINAL GRAIN SIZE 0.035, wall_thickness: 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN, first_end_style: PLAIN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-063-7202, 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
55206
NSN: 3120-00-063-7202
FSC: 3120
CAGE: 09455 — RBC TRANSPORT DYNAMICS CORP DIV RBC TRANSPORT DYNAMICS (USA)
SPECIFICATIONS
diameter0.623 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
materialCOPPER
constructionSEAMLESS
heat_treatmentANNEALED TO A NOMINAL GRAIN SIZE 0.035
wall_thickness0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
first_end_stylePLAIN
special_featuresGRUMMAN; A10 AIRCRAFT
features_providedENDS SEALED FOR REFRIGERATION SERVICE
operating_pressure650.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
maximum_operating_temp204.4 CELSIUS DEGC
cross-sectional_shape_stylePLAIN ROUND
measuring_method_and_length300.000 INCHES MINIMUM RANDOM AND 312.000 INCHES MAXIMUM RANDOM IN
NSN3120-00-063-7202
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 55206 · Legrand ⚠ 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: 0.6245 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: WITHOUT INSERT OR LINER WITH STAKING GROOVE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
•
TEST DATA DOCUMENT: 81349-MIL-L-8937 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
STATIC RADIAL LOAD RATING: 17400 POUNDS LBS
•
MATERIAL: GREASE AND LUBRICANT DRY FILM LUBRICATION
•
INNER MEMBER WIDTH: 0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
•
OUTER MEMBER WIDTH: 0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER0.6245 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
STYLE DESIGNATORWITHOUT INSERT OR LINER WITH STAKING GROOVE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
TEST DATA DOCUMENT81349-MIL-L-8937 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
STATIC RADIAL LOAD RATING17400 POUNDS LBS
MATERIALGREASE AND LUBRICANT DRY FILM LUBRICATION
INNER MEMBER WIDTH0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
OUTER MEMBER WIDTH0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
OUTER MEMBER OUTSIDE DIAMETER1.1870 INCHES MINIMUM AND 1.1875 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
55206Interchangeable
interchangeable cross-reference
interchangeable
BT55206Interchangeable
interchangeable cross-reference
interchangeable
V1642Interchangeable
interchangeable cross-reference
interchangeable
SPECH21REVISI0NInterchangeable
interchangeable cross-reference
interchangeable
31101RInterchangeable
interchangeable cross-reference
interchangeable
RPG10A1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55206?
55206 is a CONE AND ROLLERS,TAPERED ROLLER manufactured by Legrand.
What parts can replace 55206?
There are 10 known substitutes for 55206: 55206, BT55206, V1642 and 7 more. Substitute compatibility should be verified for your specific system.
Is 55206 still available?
55206 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