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Technical Data Sheet
PartsTable / COMPONENT / 12C30
12C30 ✓ 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,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL, hardness_rating: 30.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM, inside_diameter: 2.546 INCHES MINIMUM AND 2.578 INCHES MAXIMUM IN, outside_diameter: 3.500 INCHES NOMINAL IN, features_provided: CASEHARDENED, overall_thickness: 0.0359 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-4404, 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
12C30
NSN: 3110-00-100-4404
FSC: 3110
CAGE: 24047 — COOPER INDUSTRIES INC DBA COOPER TOOLS (USA)
SPECIFICATIONS
materialSTEEL
hardness_rating30.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
inside_diameter2.546 INCHES MINIMUM AND 2.578 INCHES MAXIMUM IN
outside_diameter3.500 INCHES NOMINAL IN
features_providedCASEHARDENED
overall_thickness0.0359 INCHES NOMINAL IN
NSN3110-00-100-4404
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 12C30 · 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
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
CONE WIDTH: 1.8375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 5.9090 INCHES NOMINAL IN
•
MATERIAL: STEEL ROLLER
•
CUP WIDTH: 1.4375 INCHES NOMINAL IN
•
BORE DIAMETER: 2.7500 INCHES NOMINAL IN
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS (FLIS)
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
CONE WIDTH1.8375 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL OUTSIDE DIAMETER5.9090 INCHES NOMINAL IN
OVERALL WIDTH1.7500 INCHES NOMINAL IN
MATERIALSTEEL ROLLER
CUP WIDTH1.4375 INCHES NOMINAL IN
BORE DIAMETER2.7500 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1300 INCHES NOMINAL IN
MATERIALSTEEL CUP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
742Interchangeable
interchangeable cross-reference
interchangeable
BRTG2Interchangeable
interchangeable cross-reference
interchangeable
64AX38Interchangeable
interchangeable cross-reference
interchangeable
12C30Interchangeable
interchangeable cross-reference
interchangeable
114GS216-1Interchangeable
interchangeable cross-reference
interchangeable
1275Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12C30?
12C30 is a BEARING,ROLLER,TAPERED.
What parts can replace 12C30?
There are 17 known substitutes for 12C30: 742, BRTG2, 64AX38 and 14 more. Substitute compatibility should be verified for your specific system.
Is 12C30 still available?
12C30 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026