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Technical Data Sheet

ST-221 — Technical Data Sheet

✓ 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

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, bore_diameter: 55.00 MILLIMETERS NOMINAL MM, overall_width: 29.0 MILLIMETERS NOMINAL MM, load_direction: RADIAL, overall_length: 0.210 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System under NSN 3110-00-555-5570, 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-221
NSN: 3110-00-555-5570
FSC: 3110
CAGE: 29510 — KOMATSU AMERICAN INTL CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter55.00 MILLIMETERS NOMINAL MM
overall_width29.0 MILLIMETERS NOMINAL MM
load_directionRADIAL
overall_length0.210 INCHES MAXIMUM IN
surface_finishGROUND
mounting_methodTERMINAL
terminal_length0.500 INCHES MAXIMUM IN
overall_diameter0.205 INCHES MAXIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: NPN
style_designatorLOADING GROOVE, NON-SEPARABLE
NSN3110-00-555-5570
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: ST-221 · 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
•
OVERALL OUTSIDE DIAMETER: 120.00 MILLIMETERS NOMINAL MM
•
BORE DIAMETER: 55.00 MILLIMETERS NOMINAL MM
•
STYLE DESIGNATOR: LOADING GROOVE, NON-SEPARABLE
•
MATERIAL: STEEL OVERALL
•
SURFACE FINISH: GROUND
•
RETAINER FABRICATION METHOD: PRESSED
•
INTERNAL FIT-UP DESIGNATION: STANDARD
TECHNICAL CHARACTERISTICS
OVERALL OUTSIDE DIAMETER120.00 MILLIMETERS NOMINAL MM
BORE DIAMETER55.00 MILLIMETERS NOMINAL MM
STYLE DESIGNATORLOADING GROOVE, NON-SEPARABLE
MATERIALSTEEL OVERALL
SURFACE FINISHGROUND
RETAINER FABRICATION METHODPRESSED
INTERNAL FIT-UP DESIGNATIONSTANDARD
OVERALL WIDTH29.0 MILLIMETERS NOMINAL MM
STANDARD TOLERANCE DESIGNATIONABEC NO.1
BORE SHAPESTRAIGHT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
311SW1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
I72311InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4611InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
310InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
311WInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
D311W12VInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST-221?
ST-221 is a BEARING,BALL,ANNULAR.
What parts can replace ST-221?
There are 20 known substitutes for ST-221: 311SW1, I72311, 4611 and 17 more. Substitute compatibility should be verified for your specific system.
Is ST-221 still available?
ST-221 is currently cancelled.
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