Portable idiot drill grinder, twist drill grinder. Grinding is accurate and rapid, easy operation, with no skill to grind. Economical price that greatly reduces the cost and improves the use effect. With diamond grinding wheel, it can be equipped directly with an accurate angle and long service life. The electrically controlled and powerful DC motor: stable frequency, strong horsepower and long service life. Bearing shaft and locking unit. The machine is set up with the function of adjusting a point (central point) size, which can effectively coordinate with the material of drill hole and the rotation speed. It can control the quality precision and prolong the service life of the drill bit. Drill grinder technical parameters: Grinding range: Φ8-Φ30mm Point angle: 100°-140° Power: 220V/450W Speed: 4000RPM Diamond grinding wheel: CBN or SDC Standard 14 collets : Φ13, Φ14, Φ15, Φ16, Φ17, Φ18, Φ19, Φ20, Φ21, Φ22, Φ23, Φ24, Φ25, Φ26 Apolegamic collets: Φ8, Φ9, Φ10, Φ11, Φ12, Φ27, Φ28, Φ29, Φ30 Standard accessory: 5mm hex wrench Pruduct size: 45.7×22.5×23.5cm Package size: 48×24.5×25.5cm Net weight: 25Kg Gross weight: 27Kg