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BM51 — CUP,TAPERED ROLLER BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

BM51: CUP,TAPERED ROLLER BEARING.

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 METER CASE, bulb_type: PLAIN RIGID, case_type: DUSTPROOF, body_width: 1.300 INCHES MAXIMUM IN, bulb_style: PLAIN BULB, scale_type: CONCENTRIC DIAL. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-0512, 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
BM51
NSN: 3110-00-100-0512
NIINs: 001000512, 010485972
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 46717 — PETTIBONE LLC (USA)
SPECIFICATIONS
materialSTEEL METER CASE
bulb_typePLAIN RIGID
case_typeDUSTPROOF
body_width1.300 INCHES MAXIMUM IN
bulb_stylePLAIN BULB
scale_typeCONCENTRIC DIAL
body_height1.031 INCHES MAXIMUM IN
body_length1.120 INCHES MAXIMUM IN
top_diameter0.438 INCHES IN
bulb_quantity1
case_diameter2.188 INCHES NOMINAL IN
dial_diameter1.750 INCHES NOMINAL IN
NSN3110-00-100-0512
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: BM51 · 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
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
SUBSTITUTES & CROSS-REFERENCES 7
01845-1281Reference document
Same NSN cross-reference
Reference document — Secondary reference
654159Reference document
Same NSN cross-reference
Reference document — Secondary reference
05428NReference document
Same NSN cross-reference
Reference document — Secondary reference
13621Reference document
Same NSN cross-reference
Reference document — Secondary reference
AA59649-175BSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
13621-20629Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BM51?
BM51 is a CUP,TAPERED ROLLER BEARING.
What parts can replace BM51?
There are 7 known substitutes for BM51: 01845-1281, 654159, 05428N and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BM51?
BM51 is cataloged in the U.S. Government catalog under NSN 3110-00-100-0512. 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.