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Technical Data Sheet
PartsTable / COMPONENT / T139
T139 ✓ 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

SWITCH,RADIO FREQUENCY TRANSMISS. Key specifications include material: RUBBER CHLOROPRENE CLASS CR AND RUBBER NEOPRENE AND RUBBER SYNTHETIC OVERALL, cone_width: 1.4240 INCHES NOMINAL IN, bore_diameter: 1.3850 INCHES NOMINAL IN, nominal_width: 1.000 INCHES IN, alignment_type: RIGID, overall_height: 0.6250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0286, 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
T139
NSN: 3110-00-100-0286
FSC: 3110
CAGE: 73782 — TOWMOTOR CORP DALLAS PLANT SUB OF CATERPILLAR TRACTOR CO (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR AND RUBBER NEOPRENE AND RUBBER SYNTHETIC OVERALL
cone_width1.4240 INCHES NOMINAL IN
bore_diameter1.3850 INCHES NOMINAL IN
nominal_width1.000 INCHES IN
alignment_typeRIGID
overall_height0.6250 INCHES NOMINAL IN
surface_finishUNGROUND
style_designatorPOSITIVE DRIVE
cone_corner_radius0.1406 INCHES NOMINAL IN
nominal_pitch_length55.875 INCHES IN
nominal_pitch_distance0.375 INCHES IN
drive_type_and_quantity149 TEETH
NSN3110-00-100-0286
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: T139 · 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
•
MATERIAL: STEEL OVERALL
•
CONE CORNER RADIUS: 0.1406 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
CONE WIDTH: 1.4240 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
BORE DIAMETER: 2.8750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
CONE CORNER RADIUS0.1406 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
CONE WIDTH1.4240 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER2.8750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
10171NInterchangeable
interchangeable cross-reference
interchangeable
854220Interchangeable
interchangeable cross-reference
interchangeable
41193-101-7Interchangeable
interchangeable cross-reference
interchangeable
567Interchangeable
interchangeable cross-reference
interchangeable
114-6167Interchangeable
interchangeable cross-reference
interchangeable
114-6135Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is T139?
T139 is a SWITCH,RADIO FREQUENCY TRANSMISS.
What parts can replace T139?
There are 25 known substitutes for T139: 10171N, 854220, 41193-101-7 and 22 more. Substitute compatibility should be verified for your specific system.
Is T139 still available?
T139 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