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H81ZB — BEARING HALF,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

H81ZB: BEARING HALF,SLEEVE.

The BEARING HALF,SLEEVE is a the manufacturer industrial component. Key specifications include material: OIL LUBRICATING LUBRICATION, overall_length: 2.0000 INCHES NOMINAL IN, style_designator: HALF SLEEVE, EXTERNAL FLANGES BOTH ENDS, left_flange_width: 0.1525 INCHES NOMINAL IN, hole_spacing_angle: 60.0 DEGREES NOMINAL, right_flange_width: 0.1525 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-354-3729, 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
H81ZB
NSN: 3120-00-354-3729
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 53496 — SCHRAMM, INC. (USA)
SPECIFICATIONS
materialOIL LUBRICATING LUBRICATION
overall_length2.0000 INCHES NOMINAL IN
style_designatorHALF SLEEVE, EXTERNAL FLANGES BOTH ENDS
left_flange_width0.1525 INCHES NOMINAL IN
hole_spacing_angle60.0 DEGREES NOMINAL
right_flange_width0.1525 INCHES NOMINAL IN
body_inside_diameter1.7450 INCHES MINIMUM AND 1.7460 INCHES MAXIMUM IN
body_outside_diameter2.0615 INCHES MINIMUM AND 2.0625 INCHES MAXIMUM IN
left_flange_outside_diameter2.2500 INCHES NOMINAL IN
right_flange_outside_diameter2.2500 INCHES NOMINAL IN
antirotation/lubrication_type_and_quantity3 HOLE
NSN3120-00-354-3729
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: H81ZB · 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
•
RIGHT FLANGE WIDTH: 0.1525 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 2.0615 INCHES MINIMUM AND 2.0625 INCHES MAXIMUM IN
•
HOLE SPACING ANGLE: 60.0 DEGREES NOMINAL
•
STYLE DESIGNATOR: HALF SLEEVE, EXTERNAL FLANGES BOTH ENDS
•
BODY INSIDE DIAMETER: 1.7450 INCHES MINIMUM AND 1.7460 INCHES MAXIMUM IN
•
RIGHT FLANGE OUTSIDE DIAMETER: 2.2500 INCHES NOMINAL IN
•
LEFT FLANGE OUTSIDE DIAMETER: 2.2500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
RIGHT FLANGE WIDTH0.1525 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER2.0615 INCHES MINIMUM AND 2.0625 INCHES MAXIMUM IN
HOLE SPACING ANGLE60.0 DEGREES NOMINAL
STYLE DESIGNATORHALF SLEEVE, EXTERNAL FLANGES BOTH ENDS
OVERALL LENGTH2.0000 INCHES NOMINAL IN
BODY INSIDE DIAMETER1.7450 INCHES MINIMUM AND 1.7460 INCHES MAXIMUM IN
RIGHT FLANGE OUTSIDE DIAMETER2.2500 INCHES NOMINAL IN
LEFT FLANGE OUTSIDE DIAMETER2.2500 INCHES NOMINAL IN
LEFT FLANGE WIDTH0.1525 INCHES NOMINAL IN
ANTIROTATION/LUBRICATION TYPE AND QUANTITY3 HOLE
SUBSTITUTES & CROSS-REFERENCES 2
H81ZASame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
H81Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is H81ZB?
H81ZB is a BEARING HALF,SLEEVE.
What parts can replace H81ZB?
There are 2 known substitutes for H81ZB: H81ZA, H81. Substitute compatibility should be verified for your specific system.
What is the NSN for H81ZB?
H81ZB is cataloged in the U.S. Government catalog under NSN 3120-00-354-3729. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.