PartsTable
Technical Data Sheet
B57-2 ✓ 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 RELAY,ELECTROMAGNETIC is a the manufacturer industrial component. Key specifications include material: OIL LUBRICATING LUBRICATION, duty_type: CONTINUOUS, corner_shape: SQUARE ALL CORNERS, overall_width: 0.552 INCHES NOMINAL IN, overall_height: 1.070 INCHES NOMINAL IN, overall_length: 1.400 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 3120-00-585-5605, 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
B57-2
NSN: 3120-00-585-5605
FSC: 3120
CAGE: 71041 — ALTRA INDUSTRIAL MOTION CORP. (USA)
SPECIFICATIONS
materialOIL LUBRICATING LUBRICATION
duty_typeCONTINUOUS
corner_shapeSQUARE ALL CORNERS
coil_quantity1
overall_width0.552 INCHES NOMINAL IN
overall_height1.070 INCHES NOMINAL IN
overall_length1.400 INCHES NOMINAL IN
special_featuresCOMPACT ICE-CUBE SIZE, 2 POLE SWITCHING
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
winding_quantity1
features_providedPOLARIZED
body_inside_diameter0.3130 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN
NSN3120-00-585-5605
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: B57-2 · 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
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A COMPOSITION
CORNER SHAPE: SQUARE ALL CORNERS
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: COPPER ALLOY OVERALL
BODY INSIDE DIAMETER: 0.3130 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER: 0.4380 INCHES MINIMUM AND 0.4390 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A COMPOSITION
CORNER SHAPESQUARE ALL CORNERS
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY OVERALL
OVERALL LENGTH0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.3130 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.4380 INCHES MINIMUM AND 0.4390 INCHES MAXIMUM IN
MATERIALOIL LUBRICATING LUBRICATION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
342933-1Interchangeable
interchangeable cross-reference
interchangeable
414-1459-001Interchangeable
interchangeable cross-reference
interchangeable
1202-15-5Interchangeable
interchangeable cross-reference
interchangeable
RY2LS-U-DC24VInterchangeable
interchangeable cross-reference
interchangeable
B572Interchangeable
interchangeable cross-reference
interchangeable
RY2S-U-DC24VInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B57-2?
B57-2 is a RELAY,ELECTROMAGNETIC.
What parts can replace B57-2?
There are 13 known substitutes for B57-2: 342933-1, 414-1459-001, 1202-15-5 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B57-2?
B57-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-585-5605. This indicates validated use in U.S. government and defense supply chains.
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