| Model | FREE SPEED RPM | AVERAGE AIR CONSUMPTION( 25% ) SCFM | Chuck(Inch) | Sound dBA(pressure/Power) | Speed Reducer | Angle(Degree) | EXHAUST | LENGTH | WEIGHT | AIR PRESSURE | AIR INLET | |||
| m/m | in | kgs | lbs | psi | kg/c㎡ | |||||||||
| BW-638J | 2,500 | 4.5 | 3/8 | N/A | 3 gear planetary | 0 | Rear 360° | 230 | 9.1 | 0.96 | 2.1 | 90 | 6.3 | 1/4" |

