| Model | D557 |
| Output Watts | 4 |
| Construction | Alum |
| Voltage | 230 |
| RPM | 1550 |
| Rotation Facing Opposite Shaft End |
CCW |
| Qty. per Carton | 12 |
| Shaft Thread | 1/4-20 |
| No. of Rear Mounting Holes |
3 |
| Qty. Tapped and Untapped |
3 tapped |
| No. of Foot/Boss Mounts |
2 |
| Qty. Tapped and Untapped |
1 tapped, 1 untapped |
