The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-135-5544, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-135-5544 |
| Primary Part Number | 97173 |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Triumph Engine Control Systems Llc |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Bearing Preload Rating | 100.0 POUNDS NOMINAL LBS |
| Internal Clearance | 0.0017 INCHES MINIMUM RADIAL AND 0.0021 INCHES MAXIMUM RADIAL IN |
| Surface Finish | GROUND |
| Style Designator | COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING |
| Overall Outside Diameter | 52.00 MILLIMETERS NOMINAL MM |
| Contact Angle | 22.0 DEGREES NOMINAL |
| Load Direction | ANGULAR |
| Standard Tolerance Designation | ABEC NO.7 |
| Bore Diameter | 25.00 MILLIMETERS NOMINAL MM |
| Material | COPPER ALLOY RETAINER |
| Material | STEEL COMP M50 OUTER RING |
| Material | STEEL COMP M50 INNER RING |
| Material | STEEL COMP M50 BALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 97173 PRIMARY | Triumph Engine Control Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 10107520 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| AAMM205WOSMBRDBA1931 | 5/9 Secondary reference Timken Co Div the Timken Company |
NSN 3110-01-135-5544 is a Bearing,ball,duplex, manufactured by Triumph Engine Control Systems Llc, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-135-5544 has 1 manufacturer part number on file: 97173 (Triumph Engine Control Systems Llc).
Key specifications for 97173: Retainer Fabrication Method: MACHINED; Bearing Preload Rating: 100.0 POUNDS NOMINAL LBS; Internal Clearance: 0.0017 INCHES MINIMUM RADIAL AND 0.0021 INCHES MAXIMUM RADIAL IN; Surface Finish: GROUND. 14 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.