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Technical Data Sheet
PartsTable / COMPONENT / 8H-1-1/2
8H-1-1/2 ✓ 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 8H-1-1/2 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3130-00-478-0540, 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
8H-1-1/2
NSN: 3130-00-478-0540
FSC: 3130
CAGE: 71041 — ALTRA INDUSTRIAL MOTION CORP. (USA)
SPECIFICATIONS
Part Number8H-1-1/2
NSN3130-00-478-0540
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 8H-1-1/2 · 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
•
HOUSING WIDTH: 7.2500 INCHES NOMINAL IN
•
HOUSING HEIGHT: 4.0625 INCHES NOMINAL IN
•
ALIGNMENT TYPE: SELF-ALIGNING
•
MOUNTING SLOT LENGTH: 0.8750 INCHES NOMINAL IN
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
LUBRICATION MATERIAL: GREASE
•
HEIGHT FROM BOTTOM OF BASE TO BORE CENTERLINE: 2.0000 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC SEAL
TECHNICAL CHARACTERISTICS (FLIS)
HOUSING WIDTH7.2500 INCHES NOMINAL IN
HOUSING HEIGHT4.0625 INCHES NOMINAL IN
ALIGNMENT TYPESELF-ALIGNING
MOUNTING SLOT LENGTH0.8750 INCHES NOMINAL IN
INTERNAL FIT-UP DESIGNATIONSTANDARD
LUBRICATION MATERIALGREASE
HEIGHT FROM BOTTOM OF BASE TO BORE CENTERLINE2.0000 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEAL
MATERIALIRON CAST HOUSING
STYLE DESIGNATORPILLOW BLOCK, SOLID
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
A-A-50961 TY 1 CL B ST 1 SZ 8Interchangeable
interchangeable cross-reference
interchangeable
89-348Interchangeable
interchangeable cross-reference
interchangeable
WC601Interchangeable
interchangeable cross-reference
interchangeable
KS15Interchangeable
interchangeable cross-reference
interchangeable
8HInterchangeable
interchangeable cross-reference
interchangeable
7311388Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8H-1-1/2?
8H-1-1/2 is a 8H-1-1/2.
What parts can replace 8H-1-1/2?
There are 14 known substitutes for 8H-1-1/2: A-A-50961 TY 1 CL B ST 1 SZ 8, 89-348, WC601 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8H-1-1/2?
8H-1-1/2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3130-00-478-0540. 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