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SR542B31C168-1 — BEARING,BALL,DUPLEX

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

SR542B31C168-1: BEARING,BALL,DUPLEX.

The BEARING,BALL,DUPLEX is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C BALL, bore_diameter: 1.3122 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN, overall_width: 0.5000 INCHES NOMINAL IN, load_direction: ANGULAR, surface_finish: GROUND, special_features: RADIAL RUNOUT 0.0003 IN. INNER RING,0.0004 IN.

OUTER RING,CONTACT ANGLE OVER 25 DEGREES IN. This part is cataloged in the U.S. Government catalog under NSN 3110-00-239-7693, 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
SR542B31C168-1
NSN: 3110-00-239-7693
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 83086 — NEW HAMPSHIRE BALL BEARINGS INC DIV HITECH DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 440C BALL
bore_diameter1.3122 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN
overall_width0.5000 INCHES NOMINAL IN
load_directionANGULAR
surface_finishGROUND
special_featuresRADIAL RUNOUT 0.0003 IN. INNER RING,0.0004 IN. OUTER RING,CONTACT ANGLE OVER 25 DEGREES IN
style_designatorCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
bearing_preload_rating40.0 POUNDS NOMINAL LBS
overall_outside_diameter1.7496 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
retainer_fabrication_methodMACHINED
material_document_and_classificationUNABLE TO DECODE
lubrication_material_document_and_classificationMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-239-7693
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: SR542B31C168-1 · 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
•
RETAINER FABRICATION METHOD: MACHINED
•
BEARING PRELOAD RATING: 40.0 POUNDS NOMINAL LBS
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
•
MATERIAL DOCUMENT AND CLASSIFICATION: UNABLE TO DECODE
•
OVERALL OUTSIDE DIAMETER: 1.7496 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
•
LOAD DIRECTION: ANGULAR
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODMACHINED
BEARING PRELOAD RATING40.0 POUNDS NOMINAL LBS
SURFACE FINISHGROUND
STYLE DESIGNATORCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
MATERIAL DOCUMENT AND CLASSIFICATIONUNABLE TO DECODE
OVERALL WIDTH0.5000 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER1.7496 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
LOAD DIRECTIONANGULAR
SPECIAL FEATURESRADIAL RUNOUT 0.0003 IN. INNER RING,0.0004 IN. OUTER RING,CONTACT ANGLE OVER 25 DEGREES IN
BORE DIAMETER1.3122 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 2
3TAR21-28ULY70Reference document
Same NSN cross-reference
Reference document — Secondary reference
G201-072-002Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SR542B31C168-1?
SR542B31C168-1 is a BEARING,BALL,DUPLEX.
What parts can replace SR542B31C168-1?
There are 2 known substitutes for SR542B31C168-1: 3TAR21-28ULY70, G201-072-002. Substitute compatibility should be verified for your specific system.
What is the NSN for SR542B31C168-1?
SR542B31C168-1 is cataloged in the U.S. Government catalog under NSN 3110-00-239-7693. 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.