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527A523 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

527A523: 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 OVERALL, cup_width: 1.0995 INCHES NOMINAL IN, cone_width: 1.5545 INCHES NOMINAL IN, bore_diameter: 1.7713 INCHES NOMINAL IN, overall_width: 1.5545 INCHES NOMINAL IN, special_features: CUP ANGLE 21 DEG MINUS 32 MIN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-183-9949, 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
527A523
NSN: 3110-00-183-9949
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.0995 INCHES NOMINAL IN
cone_width1.5545 INCHES NOMINAL IN
bore_diameter1.7713 INCHES NOMINAL IN
overall_width1.5545 INCHES NOMINAL IN
special_featuresCUP ANGLE 21 DEG MINUS 32 MIN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0620 INCHES NOMINAL IN
backface_corner_radius0.0780 INCHES NOMINAL IN
overall_outside_diameter3.9380 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-183-9949
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 527A523 · 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
•
CUP WIDTH: 1.0995 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
OVERALL OUTSIDE DIAMETER: 3.9380 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0780 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.0620 INCHES NOMINAL IN
•
CONE WIDTH: 1.5545 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
CUP WIDTH1.0995 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
OVERALL WIDTH1.5545 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.9380 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0780 INCHES NOMINAL IN
CONE CORNER RADIUS0.0620 INCHES NOMINAL IN
CONE WIDTH1.5545 INCHES NOMINAL IN
SPECIAL FEATURESCUP ANGLE 21 DEG MINUS 32 MIN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
BORE DIAMETER1.7713 INCHES NOMINAL IN
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 527A523?
527A523 is a BEARING,ROLLER,TAPERED.
What is the NSN for 527A523?
527A523 is cataloged in the U.S. Government catalog under NSN 3110-00-183-9949. 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.