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Technical Data Sheet
PartsTable / COMPONENT / TB28C
TB28C ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The BEARING UNIT,BALL is a the manufacturer industrial component. Key specifications include material: RUBBER SEAL, seal_type: CONTACT, block_type: FIXED, base_length: 2.0000 INCHES NOMINAL IN, bore_diameter: 1.7500 INCHES NOMINAL IN, housing_width: 5.0000 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3130-01-138-9739, 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
TB28C
NSN: 3130-01-138-9739
FSC: 3130
CAGE: 02695 — MORSE INDUSTRIAL CORP SEALMASTER BEARING DIV SUB OF EMERSON ELECTRIC CO (USA)
SPECIFICATIONS
materialRUBBER SEAL
seal_typeCONTACT
block_typeFIXED
base_length2.0000 INCHES NOMINAL IN
bore_diameter1.7500 INCHES NOMINAL IN
housing_width5.0000 INCHES NOMINAL IN
seal_locationBOTH ENDS
alignment_typeSELF-ALIGNING
housing_height4.2500 INCHES NOMINAL IN
shaft_end_typeOPEN
collar_locationONE END
style_designatorPILLOW BLOCK, SOLID
NSN3130-01-138-9739
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: TB28C · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SHAFT END TYPE: OPEN
•
MATERIAL: RUBBER SEAL
•
STYLE DESIGNATOR: PILLOW BLOCK, SOLID
•
SEAL LOCATION: BOTH ENDS
•
HOUSING HEIGHT: 4.2500 INCHES NOMINAL IN
•
HEIGHT FROM BOTTOM OF BASE TO BORE CENTERLINE: 2.1250 INCHES NOMINAL IN
•
ASSEMBLY OVERALL LENGTH: 2.0000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SHAFT END TYPEOPEN
MATERIALRUBBER SEAL
MATERIALSTEEL BEARING SURFACE
STYLE DESIGNATORPILLOW BLOCK, SOLID
SEAL LOCATIONBOTH ENDS
HOUSING HEIGHT4.2500 INCHES NOMINAL IN
HEIGHT FROM BOTTOM OF BASE TO BORE CENTERLINE2.1250 INCHES NOMINAL IN
ASSEMBLY OVERALL LENGTH2.0000 INCHES NOMINAL IN
BASE LENGTH2.0000 INCHES NOMINAL IN
BLOCK TYPEFIXED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
1P4-26DInterchangeable
interchangeable cross-reference
interchangeable
229-6019-68Interchangeable
interchangeable cross-reference
interchangeable
10-820-4Interchangeable
interchangeable cross-reference
interchangeable
8337Interchangeable
interchangeable cross-reference
interchangeable
108-0204-00Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TB28C?
TB28C is a BEARING UNIT,BALL.
What parts can replace TB28C?
There are 5 known substitutes for TB28C: 1P4-26D, 229-6019-68, 10-820-4 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for TB28C?
TB28C is cataloged in the Federal Logistics Information System (FLIS) under NSN 3130-01-138-9739. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026