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M2904 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

M2904: BEARING,ROLLER,TAPERED.

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 COMP E52100 OVERALL, cup_width: 1.7500 INCHES NOMINAL IN, cone_width: 2.2500 INCHES NOMINAL IN, bore_diameter: 5.5000 INCHES NOMINAL IN, overall_width: 2.2500 INCHES NOMINAL IN, standout_width: 0.5000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-767-2021, 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
MRO→ MRO_GENERAL→ M2904
NSN: 3110-00-767-2021
NIINs: 007672021, 011628124
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL COMP E52100 OVERALL
cup_width1.7500 INCHES NOMINAL IN
cone_width2.2500 INCHES NOMINAL IN
bore_diameter5.5000 INCHES NOMINAL IN
overall_width2.2500 INCHES NOMINAL IN
standout_width0.5000 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.2500 INCHES NOMINAL IN
backface_corner_radius0.1300 INCHES NOMINAL IN
overall_outside_diameter9.0000 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-767-2021
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M2904 · 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: PRESSED
•
CUP WIDTH: 1.7500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 9.0000 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.1300 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.2500 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.5000 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
RETAINER FABRICATION METHODPRESSED
CUP WIDTH1.7500 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH2.2500 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER9.0000 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1300 INCHES NOMINAL IN
CONE CORNER RADIUS0.2500 INCHES NOMINAL IN
STANDOUT WIDTH0.5000 INCHES NOMINAL IN
CONE WIDTH2.2500 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
SUBSTITUTES & CROSS-REFERENCES 1
898A892Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 M2904?
M2904 is a BEARING,ROLLER,TAPERED. It is classified as a MRO (MRO_GENERAL).
What parts can replace M2904?
There is 1 known substitute for M2904: 898A892. Substitute compatibility should be verified for your specific system.
What is the NSN for M2904?
M2904 is cataloged in the U.S. Government catalog under NSN 3110-00-767-2021. 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.