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ST-284 — TRANSFORMER,AUDIO FREQUENCY

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

ST-284: TRANSFORMER,AUDIO FREQUENCY.

The TRANSFORMER,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: STEEL BALL, body_width: 0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN, bore_shape: STRAIGHT, head_style: PAN, body_height: 0.750 INCHES MAXIMUM IN, body_length: 0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-155-6446, 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
ST-284
NSN: 3110-00-155-6446
NIINs: 001556446, 010901614, 012596332
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 31007 — NAVISTAR INTERNATIONAL CORPORATION DBA NAVISTAR (USA)
SPECIFICATIONS
materialSTEEL BALL
body_width0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
bore_shapeSTRAIGHT
head_stylePAN
body_height0.750 INCHES MAXIMUM IN
body_length0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
head_height0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
thread_class3A A
bore_diameter85.00 MILLIMETERS NOMINAL MM
head_diameter0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
overall_width28.0 MILLIMETERS NOMINAL MM
thread_length0.308 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN
NSN3110-00-155-6446
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: ST-284 · 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
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: LOADING GROOVE, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 150.00 MILLIMETERS NOMINAL MM
•
BORE SHAPE: STRAIGHT
•
LOAD DIRECTION: RADIAL
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.1
TECHNICAL CHARACTERISTICS
INTERNAL FIT-UP DESIGNATIONSTANDARD
SURFACE FINISHGROUND
STYLE DESIGNATORLOADING GROOVE, NON-SEPARABLE
OVERALL WIDTH28.0 MILLIMETERS NOMINAL MM
OVERALL OUTSIDE DIAMETER150.00 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
LOAD DIRECTIONRADIAL
STANDARD TOLERANCE DESIGNATIONABEC NO.1
BORE DIAMETER85.00 MILLIMETERS NOMINAL MM
MATERIALSTEEL OUTER RING
SUBSTITUTES & CROSS-REFERENCES 7
18G52Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
1828A1Reference document
Same NSN cross-reference
Reference document — Secondary reference
1217Reference document
Same NSN cross-reference
Reference document — Secondary reference
217MReference document
Same NSN cross-reference
Reference document — Secondary reference
ND1217X1AReference document
Same NSN cross-reference
Reference document — Secondary reference
4253849Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST-284?
ST-284 is a TRANSFORMER,AUDIO FREQUENCY.
What parts can replace ST-284?
There are 7 known substitutes for ST-284: 18G52, 1828A1, 1217 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ST-284?
ST-284 is cataloged in the U.S. Government catalog under NSN 3110-00-155-6446. This indicates validated use in U.S. government and defense supply chains.
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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.