High powered, durable and reliable, the 77 Pro Series Type 1 Grinders are an asset on any jobsite.
| Model | 77H120H63 | 77H120H84 | 77H90H84 |
| Rated Power (hp) | 1.5 | 1.5 | 1.5 |
| Rated Power (kW) | 1.12 | 1.12 | 1.12 |
| Max Free Speed (rpm) | 12000 | 12000 | 9000 |
| Output | 3/8 in.- 24 Thread, 3 in. Guard | 1/2 in.- 13 Thread, 4 in. Guard | 1/2 in.- 13 Thread, 4 in. Guard |
| Weight (lbs) | 6.13 | 6.5 | 6.5 |
| Weight (kg) | 2.8 | 3 | 3 |
| Length (in) | 16.63 | 17.25 | 17.25 |
| Length (mm) | 422 | 438 | 438 |
| Air Consumption @ Load (cfm) | 39 | 39 | 37 |
| Air Consumption @ Load (L/min) | 1105 | 1105 | 1048 |
| Air Inlet Size (in) | 3/8 | 3/8 | 3/8 |
| Exhaust | Side | Side | Side |
| Vibration m/s2 | N/A | 2.8, uncertainty: 1.2 | N/A |
| Min Hose Size (in) | 1/2 | 1/2 | 1/2 |
| Min Hose Size (mm) | 13 | 13 | 13 |