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TCB14-21SU5-8 — BEARING,BALL,AIRFRAME

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

TCB14-21SU5-8: BEARING,BALL,AIRFRAME.

The BEARING,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include material: STEEL BALL, bore_diameter: 0.8748 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN, load_direction: RADIAL, inner_ring_width: 0.2802 INCHES MINIMUM AND 0.2812 INCHES MAXIMUM IN, outer_ring_width: 0.2500 INCHES NOMINAL IN, style_designator: SINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-253-7654, 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
TCB14-21SU5-8
NSN: 3110-00-253-7654
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 78118 — MPB CORPORATION DBA MPB CORP (USA)
SPECIFICATIONS
materialSTEEL BALL
bore_diameter0.8748 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN
load_directionRADIAL
inner_ring_width0.2802 INCHES MINIMUM AND 0.2812 INCHES MAXIMUM IN
outer_ring_width0.2500 INCHES NOMINAL IN
style_designatorSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
overall_outside_diameter1.3121 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN
retainer_fabrication_methodMACHINED
NSN3110-00-253-7654
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: TCB14-21SU5-8 · 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: MACHINED
•
OUTER RING WIDTH: 0.2500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
•
OVERALL OUTSIDE DIAMETER: 1.3121 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN
•
LOAD DIRECTION: RADIAL
•
BORE DIAMETER: 0.8748 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN
•
MATERIAL: STEEL OUTER RING
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODMACHINED
OUTER RING WIDTH0.2500 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE ROW, TORQUE TUBE TYPE, W/OR W/O CLOSURE
OVERALL OUTSIDE DIAMETER1.3121 INCHES MINIMUM AND 1.3125 INCHES MAXIMUM IN
LOAD DIRECTIONRADIAL
BORE DIAMETER0.8748 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN
MATERIALSTEEL OUTER RING
MATERIALSTEEL INNER RING
MATERIALCOPPER ALLOY RETAINER
MATERIALSTEEL BALL
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 1
640837Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is TCB14-21SU5-8?
TCB14-21SU5-8 is a BEARING,BALL,AIRFRAME.
What parts can replace TCB14-21SU5-8?
There is 1 known substitute for TCB14-21SU5-8: 640837. Substitute compatibility should be verified for your specific system.
What is the NSN for TCB14-21SU5-8?
TCB14-21SU5-8 is cataloged in the U.S. Government catalog under NSN 3110-00-253-7654. 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.