Motor Frame Size Lookup
Look up NEMA and IEC motor frame sizes. Find shaft height, shaft diameter, mounting bolt spacing, and typical power ranges for common industrial frame designations.
21 of 21 NEMA frames
| Frame | Shaft Height (in) | Shaft Dia. (in) | 2F (in) | BA (in) | Typical HP |
|---|---|---|---|---|---|
| 48 | 3 | 0.5 | 2.75 | 2.5 | 1/4-1/3 HP |
| 56 | 3.5 | 0.625 | 2.75 | 2.75 | 1/3-1 HP |
| 56C | 3.5 | 0.625 | 2.75 | 2.75 | 1/3-1 HP |
| 143T | 3.5 | 0.875 | 4 | 2.25 | 1-2 HP |
| 145T | 3.5 | 0.875 | 5 | 2.25 | 1-3 HP |
| 182T | 4.5 | 1.125 | 4.5 | 2.75 | 3-5 HP |
| 184T | 4.5 | 1.125 | 5.5 | 2.75 | 5-7.5 HP |
| 213T | 5.25 | 1.375 | 5.5 | 3.5 | 7.5-10 HP |
| 215T | 5.25 | 1.375 | 7 | 3.5 | 10-15 HP |
| 254T | 6.25 | 1.625 | 6.25 | 4.25 | 15-20 HP |
| 256T | 6.25 | 1.625 | 8.25 | 4.25 | 20-25 HP |
| 284T | 7 | 1.875 | 7 | 4.75 | 25-30 HP |
| 286T | 7 | 1.875 | 9.5 | 4.75 | 30-40 HP |
| 324T | 8 | 2.125 | 8 | 5.25 | 40-50 HP |
| 326T | 8 | 2.125 | 10 | 5.25 | 50-60 HP |
| 364T | 9 | 2.375 | 9 | 5.88 | 60-75 HP |
| 365T | 9 | 2.375 | 11.25 | 5.88 | 75 HP |
| 404T | 10 | 2.875 | 10 | 6.62 | 100 HP |
| 405T | 10 | 2.875 | 12.25 | 6.62 | 100-125 HP |
| 444T | 11 | 3.375 | 11 | 7.5 | 125-150 HP |
| 445T | 11 | 3.375 | 14.5 | 7.5 | 150-200 HP |
What this tool covers
Included
- ✓ NEMA frame sizes from 48 through 445T
- ✓ IEC frame sizes from 56 through 355L
- ✓ Shaft height (D/H), shaft diameter, and typical power ranges
- ✓ NEMA mounting dimensions: 2F (bolt hole spacing), BA (axial bolt spacing)
- ✓ Schematic dimension diagrams for each frame
- ✓ Search by frame designation or HP/kW value
Not included
- ✗ Exact frame-to-HP mapping (varies by manufacturer, speed, and enclosure)
- ✗ NEMA 56H, 56HZ, and other fractional HP specialty frames
- ✗ IEC mounting flange dimensions (B5, B14, V1)
- ✗ Overall motor length, weight, or conduit box location
- ✗ NEMA to IEC frame cross-reference mapping
Motor specs scattered across supplier datasheets?
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