The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-344-3897, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Skf Usa Inc.. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3110-01-344-3897 |
| Primary Part Number | SB1128-102 |
| Item Name | Bearing,ball,duplex |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Skf Usa Inc. |
| Status | ACTIVE |
| Retainer Fabrication Method | MACHINED |
| Bearing Preload Rating | 20.0 POUNDS NOMINAL LBS |
| Surface Treatment Document and Classification | AMS 2412 ASSN STD SINGLE TREATMENT RESPONSE RETAINER |
| Surface Finish | GROUND |
| Bearing Preload Designation | LIGHT |
| Precious Material | SILVER |
| Style Designator | SHOULDERED INNER RING, NON-SEPARABLE, FACE TO FACE MOUNTING |
| Material Document and Classification | UNABLE TO DECODE |
| Overall Outside Diameter | 3.1492 INCHES MINIMUM AND 3.1496 INCHES MAXIMUM IN |
| Contact Angle | 25.0 DEGREES MINIMUM AND 30.0 DEGREES MAXIMUM |
| Load Direction | ANGULAR |
| Surface Treatment | SILVER RETAINER |
| Precious Material and Location | PLATED RETAINER SILVER |
| Bore Diameter | 1.9682 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN |
| Material | STEEL COMP 4340 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 | F |
| Part Number | Manufacturer |
|---|---|
| SB1128-102 | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| SB1128-102 PRIMARY | Skf Usa Inc. (USA) |
| Reference | Meaning |
|---|---|
| 7110KJD-401 | 5/1 Secondary reference Skf Usa Inc. |
| AAM9110WO-2 | 5/9 Secondary reference Timken Co Div the Timken Company |
NSN 3110-01-344-3897 is a Bearing,ball,duplex, manufactured by Skf Usa Inc., classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-344-3897 has 2 manufacturer part numbers on file: SB1128-102 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp), SB1128-102 (Skf Usa Inc.).
Key specifications for SB1128-102: Retainer Fabrication Method: MACHINED; Bearing Preload Rating: 20.0 POUNDS NOMINAL LBS; Surface Treatment Document and Classification: AMS 2412 ASSN STD SINGLE TREATMENT RESPONSE RETAINER; Surface Finish: GROUND. 18 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.