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Technical Data Sheet
PartsTable / COMPONENT / BB87
BB87 ✓ 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: 0.5000 INCHES NOMINAL IN, cone_width: 0.5910 INCHES NOMINAL IN, bore_diameter: 1.0000 INCHES NOMINAL IN, overall_width: 0.5910 INCHES NOMINAL IN, standout_width: 0.0910 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-7455, 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
BB87
NSN: 3110-00-155-7455
FSC: 3110
CAGE: 07385 — THE BIRO MANUFACTURING COMPANY (USA)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width0.5000 INCHES NOMINAL IN
cone_width0.5910 INCHES NOMINAL IN
bore_diameter1.0000 INCHES NOMINAL IN
overall_width0.5910 INCHES NOMINAL IN
standout_width0.0910 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, NORMAL ANGLE
cone_corner_radius0.0400 INCHES NOMINAL IN
backface_corner_radius0.0460 INCHES NOMINAL IN
overall_outside_diameter2.0470 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 4
NSN3110-00-155-7455
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: BB87 · 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
•
STANDOUT WIDTH: 0.0910 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 4
•
CONE CORNER RADIUS: 0.0400 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
BORE DIAMETER: 1.0000 INCHES NOMINAL IN
•
CONE WIDTH: 0.5910 INCHES NOMINAL IN
•
BACKFACE CORNER RADIUS: 0.0460 INCHES NOMINAL IN
•
OVERALL OUTSIDE DIAMETER: 2.0470 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)
STANDOUT WIDTH0.0910 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 4
CONE CORNER RADIUS0.0400 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
BORE DIAMETER1.0000 INCHES NOMINAL IN
CONE WIDTH0.5910 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0460 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER2.0470 INCHES NOMINAL IN
OVERALL WIDTH0.5910 INCHES NOMINAL IN
CUP WIDTH0.5000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
11Q-000229-510CPInterchangeable
interchangeable cross-reference
interchangeable
11-227CPInterchangeable
interchangeable cross-reference
interchangeable
MIL-R-83248/1-2 29Interchangeable
interchangeable cross-reference
interchangeable
8916K616Interchangeable
interchangeable cross-reference
interchangeable
8865K2Interchangeable
interchangeable cross-reference
interchangeable
A227Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BB87?
BB87 is a BEARING,ROLLER,TAPERED.
What parts can replace BB87?
There are 24 known substitutes for BB87: 11Q-000229-510CP, 11-227CP, MIL-R-83248/1-2 29 and 21 more. Substitute compatibility should be verified for your specific system.
Is BB87 still available?
BB87 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