| Model | 311A |
| Rated Power (hp) | 0.25 |
| Rated Power hp (kW) | 0.19 |
| Max Free Speed (rpm) | 12000 |
| Exhaust | Side |
| Output Thread | 5/16 in. – 24 Thread |
| Orbit Diameter (in) | 3/16 |
| Orbit Diameter (mm) | 5 |
| Pad Diameter or Size (in) | 6 |
| Pad Diameter or Size (mm) | 150 |
| Pad Face | Vinyl |
| Weight (lbs) | 4.2 |
| Weight (kg) | 1.91 |
| Length (in) | 9.76 |
| Length (mm) | 248 |
| Vibration m/s2 (uncertainty K) | 32.3 (uncertainty: 5.6) |
| Sound Pressure/ Power dBA | 85.6 / 98.6 |
| Min Hose Size (in) | 3/8 |
| Min Hose Size (mm) | 10 |
| Air Inlet (in) | ¼ NPT |
| Average Air Consumption (cfm) | 4 |
| Average Air Consumption (L/min) | 113 |