Diamond coring motors are used with Vac-U-Rig® and Dymo-Rig diamond core rigs to drill holes into reinforced concrete. This 15 amp model provides core drilling power where 20 amp service is unavailable. This unit has a 375 RPM or 750 RPM operating speed. The 4090 uses a shear pin to protect gears and motor against overload. Shear pins are easily replaced and extra pins are included with the unit. This unit will handle core bits from 2-1/2 in. to 8 in. in diameter.
- Two speeds: 375 and 750 RPM
- 15 amp motor
- Shear pin protection protects gears and motor
- Built-in water swivel
