PartsTable
Technical Data Sheet
PartsTable / COMPONENT / BB1551-4
BB1551-4 ✓ 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 ROLLER,LINEAR-ROTARY MOTION is a the manufacturer industrial component. Key specifications include material: STEEL, face_width: 1.000 INCHES NOMINAL IN, bore_length: 1.254 INCHES NOMINAL IN, hub_diameter: 3.100 INCHES NOMINAL IN, outside_diameter: 3.525 INCHES NOMINAL IN, style_designator: PLAIN, ONE PROTRUDING HUB. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-221-5163, 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
BB1551-4
NSN: 3120-00-221-5163
FSC: 3120
CAGE: 92563 — MCGILL MANUFACTURING CO, INC (USA)
SPECIFICATIONS
materialSTEEL
face_width1.000 INCHES NOMINAL IN
bore_length1.254 INCHES NOMINAL IN
hub_diameter3.100 INCHES NOMINAL IN
outside_diameter3.525 INCHES NOMINAL IN
style_designatorPLAIN, ONE PROTRUDING HUB
bore_inside_diameter1.375 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
NSN3120-00-221-5163
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: BB1551-4 · 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
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
MATERIAL: STEEL
•
BORE LENGTH: 1.254 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.525 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN, ONE PROTRUDING HUB
•
FACE WIDTH: 1.000 INCHES NOMINAL IN
•
HUB DIAMETER: 3.100 INCHES NOMINAL IN
•
BORE INSIDE DIAMETER: 1.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIALSTEEL
BORE LENGTH1.254 INCHES NOMINAL IN
OUTSIDE DIAMETER3.525 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN, ONE PROTRUDING HUB
FACE WIDTH1.000 INCHES NOMINAL IN
HUB DIAMETER3.100 INCHES NOMINAL IN
BORE INSIDE DIAMETER1.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
9091685Interchangeable
interchangeable cross-reference
interchangeable
3502-24-01-401Interchangeable
interchangeable cross-reference
interchangeable
185530Interchangeable
interchangeable cross-reference
interchangeable
151992Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BB1551-4?
BB1551-4 is a ROLLER,LINEAR-ROTARY MOTION.
What parts can replace BB1551-4?
There are 4 known substitutes for BB1551-4: 9091685, 3502-24-01-401, 185530 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BB1551-4?
BB1551-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-221-5163. 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