PartsTable
Technical Data Sheet
221K ✓ 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 CONTROL,CONSTANT FREQUENCY is a the manufacturer industrial component. Key specifications include phase: SINGLE, material: ALUMINUM ALLOY CASE, bore_shape: STRAIGHT, power_source: EXTERNAL, bore_diameter: 105.0 MILLIMETERS NOMINAL MM, overall_width: 36.0 MILLIMETERS NOMINAL MM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-144-8953, 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
221K
NSN: 3110-00-144-8953
FSC: 3110
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
phaseSINGLE
materialALUMINUM ALLOY CASE
bore_shapeSTRAIGHT
power_sourceEXTERNAL
bore_diameter105.0 MILLIMETERS NOMINAL MM
overall_width36.0 MILLIMETERS NOMINAL MM
inclosure_typeENCASED
load_directionRADIAL
surface_finishGROUND
mounting_methodBULKHEAD
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
features_providedWARNING INDICATOR
NSN3110-00-144-8953
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 221K · 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
BORE DIAMETER: 105.0 MILLIMETERS NOMINAL MM
BORE SHAPE: STRAIGHT
STANDARD TOLERANCE DESIGNATION: ABEC NO.1
NONDEFINITIVE SPEC/STD DATA: 111 TYPE AND 1 CLASS AND 00 GRADE
LOAD DIRECTION: RADIAL
INTERNAL FIT-UP DESIGNATION: STANDARD
MATERIAL: STEEL OVERALL
SURFACE FINISH: GROUND
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER105.0 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
STANDARD TOLERANCE DESIGNATIONABEC NO.1
NONDEFINITIVE SPEC/STD DATA111 TYPE AND 1 CLASS AND 00 GRADE
LOAD DIRECTIONRADIAL
INTERNAL FIT-UP DESIGNATIONSTANDARD
MATERIALSTEEL OVERALL
SURFACE FINISHGROUND
OVERALL WIDTH36.0 MILLIMETERS NOMINAL MM
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
3221Interchangeable
interchangeable cross-reference
interchangeable
187L100Interchangeable
interchangeable cross-reference
interchangeable
WC179Interchangeable
interchangeable cross-reference
interchangeable
221-SInterchangeable
interchangeable cross-reference
interchangeable
5466562Interchangeable
interchangeable cross-reference
interchangeable
BC22J9-0SPInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 221K?
221K is a CONTROL,CONSTANT FREQUENCY.
What parts can replace 221K?
There are 25 known substitutes for 221K: 3221, 187L100, WC179 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 221K?
221K is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-144-8953. This indicates validated use in U.S. government and defense supply chains.
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