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Technical Data Sheet
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RB-31 — Technical Data Sheet

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— · 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

The BEARING,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include material: PLASTIC PHENOLIC, design_type: DIPOLE SINGLE ANTENNA ELEMENT, skirt_style: FLARED, inside_width: 0.156 INCHES NOMINAL IN, skirt_design: NONDETACHABLE, bore_diameter: 3.5000 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 3110-00-156-1486, 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
RB-31
NSN: 3110-00-156-1486
FSC: 3110
CAGE: 08785 — ANN ARBOR BEARING AND MFG CO (USA)
SPECIFICATIONS
materialPLASTIC PHENOLIC
design_typeDIPOLE SINGLE ANTENNA ELEMENT
skirt_styleFLARED
inside_width0.156 INCHES NOMINAL IN
skirt_designNONDETACHABLE
bore_diameter3.5000 INCHES NOMINAL IN
overall_depth0.500 INCHES NOMINAL IN
alignment_typeRIGID
overall_height0.8 METERS MINIMUM AND 1.6 METERS MAXIMUM
pointer_designNONDETACHABLE
surface_finishGROUND
furnished_itemsREFLECTOR AND FILTER AND RADOME AND PEDESTAL
NSN3110-00-156-1486
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: RB-31 · 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
•
SURFACE FINISH: GROUND
•
OVERALL OUTSIDE DIAMETER: 6.2187 INCHES NOMINAL IN
•
ALIGNMENT TYPE: RIGID
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR THRUST BEARINGS
•
BORE DIAMETER: 3.5000 INCHES NOMINAL IN
•
MATERIAL: STEEL WASHER
•
STYLE DESIGNATOR: FLAT RACE SURFACE, CYLINDRICAL ROLLERS
TECHNICAL CHARACTERISTICS
SURFACE FINISHGROUND
OVERALL OUTSIDE DIAMETER6.2187 INCHES NOMINAL IN
ALIGNMENT TYPERIGID
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR THRUST BEARINGS
BORE DIAMETER3.5000 INCHES NOMINAL IN
MATERIALSTEEL WASHER
MATERIALSTEEL ROLLER
STYLE DESIGNATORFLAT RACE SURFACE, CYLINDRICAL ROLLERS
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
OVERALL HEIGHT1.0000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
OPALInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
12Z317-38InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
D42InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
E4-5InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
T26InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SCD1967InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RB-31?
RB-31 is a BEARING,BALL,AIRFRAME.
What parts can replace RB-31?
There are 21 known substitutes for RB-31: OPAL, 12Z317-38, D42 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RB-31?
RB-31 is cataloged in the Federal Logistics Information System under NSN 3110-00-156-1486. 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: October 2026