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Technical Data Sheet
PartsTable / COMPONENT / RM3A87-1
RM3A87-1 ✓ 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 CUP,TAPERED ROLLER BEARING is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, overall_width: 0.6875 INCHES NOMINAL IN, outside_diameter: 3.4843 INCHES NOMINAL IN, special_features: STEEP ANGLE, style_designator: NORMAL ANGLE, backface_corner_radius: 0.0630 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0586, 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
RM3A87-1
NSN: 3110-00-100-0586
FSC: 3110
CAGE: 27996 — HEIL ENVIRONMENTAL INDUSTRIES (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width0.6875 INCHES NOMINAL IN
outside_diameter3.4843 INCHES NOMINAL IN
special_featuresSTEEP ANGLE
style_designatorNORMAL ANGLE
backface_corner_radius0.0630 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-0586
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: RM3A87-1 · 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
•
BACKFACE CORNER RADIUS: 0.0630 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 3.4843 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE
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)
SPECIAL FEATURESSTEEP ANGLE
BACKFACE CORNER RADIUS0.0630 INCHES NOMINAL IN
OUTSIDE DIAMETER3.4843 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
MATERIALSTEEL OVERALL
STYLE DESIGNATORNORMAL ANGLE
OVERALL WIDTH0.6875 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
202573Interchangeable
Bag,surveyor's
interchangeable
HDS1-2AInterchangeable
Bag,surveyor's
interchangeable
H-408Interchangeable
interchangeable cross-reference
interchangeable
SInterchangeable
interchangeable cross-reference
interchangeable
S-3/4Interchangeable
interchangeable cross-reference
interchangeable
90-0410-2900-301Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RM3A87-1?
RM3A87-1 is a CUP,TAPERED ROLLER BEARING.
What parts can replace RM3A87-1?
There are 24 known substitutes for RM3A87-1: 202573, HDS1-2A, H-408 and 21 more. Substitute compatibility should be verified for your specific system.
Is RM3A87-1 still available?
RM3A87-1 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