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ST312 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

ST312: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, bore_diameter: 2.3750 INCHES NOMINAL IN, overall_width: 1.125 INCHES NOMINAL IN, inclosure_type: OPEN, load_direction: RADIAL. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-155-8945, 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
ST312
NSN: 3110-00-155-8945
NIINs: 001558945, 013444575
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter2.3750 INCHES NOMINAL IN
overall_width1.125 INCHES NOMINAL IN
inclosure_typeOPEN
load_directionRADIAL
overall_height1.468 INCHES NOMINAL IN
overall_length1.375 INCHES NOMINAL IN
surface_finishGROUND
mounting_methodPLUG-IN SINGLE GROUP
frequency_rating50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL SINGLE COMPONENT
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
NSN3110-00-155-8945
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: ST312 · 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: PRESSED
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 3.7500 INCHES NOMINAL IN
•
BORE SHAPE: STRAIGHT
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY OVERALL OD,AS MODIFIED BY OVERALL WIDTH
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODPRESSED
INTERNAL FIT-UP DESIGNATIONSTANDARD
SURFACE FINISHGROUND
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
OVERALL WIDTH0.6870 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.7500 INCHES NOMINAL IN
BORE SHAPESTRAIGHT
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY OVERALL OD,AS MODIFIED BY OVERALL WIDTH
NONDEFINITIVE SPEC/STD DATA115 TYPE AND 00 GRADE
LOAD DIRECTIONRADIAL
SUBSTITUTES & CROSS-REFERENCES 8
XLS2 3-8Reference document
Same NSN cross-reference
Reference document — Secondary reference
3115X1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
RDCL3353Reference document
Same NSN cross-reference
Reference document — Secondary reference
206448-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
80534-01Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
FF-B-2844/06CEXBCReference document
Same NSN cross-reference
Reference document — Identification 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 ST312?
ST312 is a BEARING,BALL,ANNULAR.
What parts can replace ST312?
There are 8 known substitutes for ST312: XLS2 3-8, 3115X1, RDCL3353 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST312?
ST312 is cataloged in the U.S. Government catalog under NSN 3110-00-155-8945. 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.