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Technical Data Sheet
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3TCR21-28P — Technical Data Sheet

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— · 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,AIRFRAME is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, bore_diameter: 1.3122 INCHES MINIMUM AND 1.3128 INCHES MAXIMUM IN, load_direction: RADIAL, inner_ring_width: 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN, outer_ring_width: 0.2500 INCHES NOMINAL IN, special_features: FRACTURED OUTER RING; TWO HOLDING RINGS OD OF OUTER RING. This part is cataloged in the Federal Logistics Information System under NSN 3110-00-679-8908, 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
3TCR21-28P
NSN: 3110-00-679-8908
FSC: 3110
CAGE: 78118 — MPB CORPORATION DBA MPB CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
bore_diameter1.3122 INCHES MINIMUM AND 1.3128 INCHES MAXIMUM IN
load_directionRADIAL
inner_ring_width0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
outer_ring_width0.2500 INCHES NOMINAL IN
special_featuresFRACTURED OUTER RING; TWO HOLDING RINGS OD OF OUTER RING
style_designatorSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
overall_outside_diameter1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
NSN3110-00-679-8908
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 3TCR21-28P · 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
•
LOAD DIRECTION: RADIAL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
OVERALL OUTSIDE DIAMETER: 1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
•
BORE DIAMETER: 1.3122 INCHES MINIMUM AND 1.3128 INCHES MAXIMUM IN
•
OUTER RING WIDTH: 0.2500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
•
INNER RING WIDTH: 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
LOAD DIRECTIONRADIAL
SPECIAL FEATURESFRACTURED OUTER RING; TWO HOLDING RINGS OD OF OUTER RING
MATERIALSTEEL CORROSION RESISTING OVERALL
OVERALL OUTSIDE DIAMETER1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
BORE DIAMETER1.3122 INCHES MINIMUM AND 1.3128 INCHES MAXIMUM IN
OUTER RING WIDTH0.2500 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
INNER RING WIDTH0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
24898InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
215-01235-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
D171876InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
BL108878InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
0101297InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
195297InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3TCR21-28P?
3TCR21-28P is a BEARING,BALL,AIRFRAME.
What parts can replace 3TCR21-28P?
There are 16 known substitutes for 3TCR21-28P: 24898, 215-01235-1, D171876 and 13 more. Substitute compatibility should be verified for your specific system.
Is 3TCR21-28P still available?
3TCR21-28P is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: October 2026