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Technical Data Sheet
PartsTable / COMPONENT / A81-33
A81-33 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

CONE AND ROLLERS,TAPERED ROLLER. Key specifications include overall_width: 2.500 INCHES NOMINAL IN, overall_height: 1.906 INCHES NOMINAL IN, overall_length: 3.500 INCHES NOMINAL IN, basic_shape_style: RECTANGULAR OR SQUARE, frequency_per_channel: 300.0 HERTZ MINIMUM OPERATING CHANNEL AND 6.0 KILOHERTZ MAXIMUM OPERATING CHANNEL, impedance_rating_per_channel: 15.000 OHMS INPUT CHANNEL AND 50.000 OHMS OUTPUT CHANNEL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0274, 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
A81-33
NSN: 3110-00-100-0274
FSC: 3110
CAGE: 65282 — WHITE MOTOR CORP (USA)
SPECIFICATIONS
overall_width2.500 INCHES NOMINAL IN
overall_height1.906 INCHES NOMINAL IN
overall_length3.500 INCHES NOMINAL IN
basic_shape_styleRECTANGULAR OR SQUARE
frequency_per_channel300.0 HERTZ MINIMUM OPERATING CHANNEL AND 6.0 KILOHERTZ MAXIMUM OPERATING CHANNEL
impedance_rating_per_channel15.000 OHMS INPUT CHANNEL AND 50.000 OHMS OUTPUT CHANNEL
average_power_rating_per_channel26.0 MILLIWATTS OUTPUT
external_dc_operating_voltage_in_volts17.0 MINIMUM SINGLE VOLTAGE AND 29.0 MAXIMUM SINGLE VOLTAGE
variation_frequency_rating_in_decibels6.0
NSN3110-00-100-0274
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A81-33 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
BORE DIAMETER: 2.0000 INCHES NOMINAL IN
•
CONE WIDTH: 1.4550 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1406 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER2.0000 INCHES NOMINAL IN
CONE WIDTH1.4550 INCHES NOMINAL IN
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
STYLE DESIGNATORNORMAL ANGLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
PA6320Interchangeable
interchangeable cross-reference
interchangeable
LS3258-3Interchangeable
interchangeable cross-reference
interchangeable
12756Interchangeable
interchangeable cross-reference
interchangeable
1327-3Interchangeable
interchangeable cross-reference
interchangeable
SC5355-0007-2Interchangeable
interchangeable cross-reference
interchangeable
BHMA-A156.1 A8133 3-1/2INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A81-33?
A81-33 is a CONE AND ROLLERS,TAPERED ROLLER.
What parts can replace A81-33?
There are 22 known substitutes for A81-33: PA6320, LS3258-3, 12756 and 19 more. Substitute compatibility should be verified for your specific system.
Is A81-33 still available?
A81-33 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026