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Technical Data Sheet
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525-522 — Technical Data Sheet

✓ 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 OVERALL, cup_width: 1.0625 INCHES NOMINAL IN, cone_width: 1.4200 INCHES NOMINAL IN, bore_diameter: 1.5000 INCHES NOMINAL IN, overall_width: 1.3750 INCHES NOMINAL IN, standout_width: 0.3120 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System under NSN 3110-00-100-4182, 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
525-522
NSN: 3110-00-100-4182
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width1.0625 INCHES NOMINAL IN
cone_width1.4200 INCHES NOMINAL IN
bore_diameter1.5000 INCHES NOMINAL IN
overall_width1.3750 INCHES NOMINAL IN
standout_width0.3120 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
features_providedPROGRAMMED AND ELECTROSTATIC SENSITIVE AND W/CLOCK AND W/ENABLE AND MONOLITHIC
output_logic_formTRANSISTOR-TRANSISTOR LOGIC
cone_corner_radius0.1400 INCHES NOMINAL IN
memory_device_typePAL
input_circuit_pattern16 INPUT
NSN3110-00-100-4182
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 525-522 · 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
•
MATERIAL: STEEL OVERALL
•
CUP WIDTH: 1.0625 INCHES NOMINAL IN
•
OVERALL OUTSIDE DIAMETER: 4.0000 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
CONE WIDTH: 1.4200 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
MATERIALSTEEL OVERALL
CUP WIDTH1.0625 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER4.0000 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
CONE WIDTH1.4200 INCHES NOMINAL IN
OVERALL WIDTH1.3750 INCHES NOMINAL IN
STANDOUT WIDTH0.3120 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1300 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
725925-50InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
ROM/PROM FAMILY 193InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
159A415H03InterchangeableGOVERNMENT REGISTRY
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 525-522?
525-522 is a BEARING,ROLLER,TAPERED.
What parts can replace 525-522?
There are 3 known substitutes for 525-522: 725925-50, ROM/PROM FAMILY 193, 159A415H03. Substitute compatibility should be verified for your specific system.
Is 525-522 still available?
525-522 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: September 2026