The Bearing Unit,roller, cataloged under National Stock Number 3130-01-225-3638, is classified within Federal Supply Class 3130 (Bearings, Mounted) of the Bearings group. The manufacturer of record is Morse Industrial Corp Sealmaster Bearing Div Sub of Emerson Electric Co. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3130-01-225-3638 |
| Primary Part Number | 550868 |
| Item Name | Bearing Unit,roller |
| FSC / FSG | 3130 / 31 — Bearings, Mounted |
| Manufacturer | Morse Industrial Corp Sealmaster Bearing Div Sub of Emerson Electric Co |
| Status | ACTIVE |
| Housing Height | 5.620 INCHES NOMINAL IN |
| Internal Fit-Up Designation | STANDARD |
| Rotating Element Locking Method | DIRECT |
| Block Type | FIXED |
| Style Designator | PILLOW BLOCK, OPTIONAL SPLIT |
| Center to Center Distance Between Mounting Holes Along Width | 7.750 INCHES MINIMUM AND 8.750 INCHES MAXIMUM IN |
| Housing Width | 10.380 INCHES NOMINAL IN |
| Base Length | 3.500 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes Along Length | 1.880 INCHES NOMINAL IN |
| Alignment Type | SELF-ALIGNING |
| Rolling Element Groove Quantity | 2 |
| Base Thickness | 1.620 INCHES NOMINAL IN |
| Bore Diameter | 2.2500 INCHES MINIMUM AND 2.2510 INCHES MAXIMUM IN |
| Material | STEEL COMP E52100 ROLLER |
| Material | IRON CAST HOUSING |
| Material | STEEL COMP E52100 INNER RACE |
| Material | STEEL COMP E52100 RACE |
| Housing Length | 4.000 INCHES NOMINAL IN |
| Height From Bottom of Base to Bore Centerline | 2.750 INCHES NOMINAL IN |
| Load Capability Type | RADIAL AND THRUST |
| 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 |
|---|---|
| 550868 PRIMARY | Morse Industrial Corp Sealmaster Bearing Div Sub of Emerson Electric Co (USA) |
| Reference | Meaning |
|---|---|
| ST36D29-1 | 5/9 Secondary reference Lockheed Martin Corp |
NSN 3130-01-225-3638 is a Bearing Unit,roller, manufactured by Morse Industrial Corp Sealmaster Bearing Div Sub of Emerson Electric Co, classified under FSC 3130, Bearings, Mounted. Status: active.
NSN 3130-01-225-3638 has 1 manufacturer part number on file: 550868 (Morse Industrial Corp Sealmaster Bearing Div Sub of Emerson Electric Co).
Key specifications for 550868: Housing Height: 5.620 INCHES NOMINAL IN; Internal Fit-Up Designation: STANDARD; Rotating Element Locking Method: DIRECT; Block Type: FIXED. 20 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.