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Technical Data Sheet
PartsTable / COMPONENT / 52-C-4120-1
52-C-4120-1 ✓ 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 SHIELD,BEARING is a the manufacturer industrial component. Key specifications include material: LEATHER OR RUBBER SYNTHETIC SEALING ELEMENT, case_style: FLANGED, seal_width: 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN, housing_bore_diameter: 3.1585 INCHES MINIMUM AND 3.1615 INCHES MAXIMUM IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 1.562 INCHES NOMINAL 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 3130-00-439-5871, 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
52-C-4120-1
NSN: 3130-00-439-5871
FSC: 3130
CAGE: 21439 — CURTISS-WRIGHT FLOW CONTROL SERVICE, LLC DBA ENGINEERED ARRESTING SYSTEMS - ESCO DIV CW FLOW CONTROL SVC LLC DBA (USA)
SPECIFICATIONS
materialLEATHER OR RUBBER SYNTHETIC SEALING ELEMENT
case_styleFLANGED
seal_width0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN
housing_bore_diameter3.1585 INCHES MINIMUM AND 3.1615 INCHES MAXIMUM IN
sealing_element_styleANGULAR
accommodated_shaft_diameter1.562 INCHES NOMINAL IN
accommodated_shaft_maximum_rated_speed1600 FEET PER MINUTE FT
NSN3130-00-439-5871
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 52-C-4120-1 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
127968R91Interchangeable
interchangeable cross-reference
interchangeable
39118Interchangeable
interchangeable cross-reference
interchangeable
SM35723Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 52-C-4120-1?
52-C-4120-1 is a SHIELD,BEARING.
What parts can replace 52-C-4120-1?
There are 3 known substitutes for 52-C-4120-1: 127968R91, 39118, SM35723. Substitute compatibility should be verified for your specific system.
What is the NSN for 52-C-4120-1?
52-C-4120-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3130-00-439-5871. 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