genti dama tip postas

Tone Top 300

The Tone Top 300, provided through Japanese AID in 1994, is equipped with rotary mud circulation pump and down the hole hammer drilling equipment. It has a 900 cfm Ingersol compressor. When mud rotary drilling is carried out, the initial roller bit used is 12 ¼". After drilling the regolith (weathered layer) the bit could be changed to 10 ½ ", 9 7/8" and 8 ½" depending on the diameter of the casing to be installed.

Groundwater boreholes are mostly completed with 6" and 8" screens and casings. The 8 ½" roller bit when used in down the hole hammer drilling, is capable of drilling to a depth of 150m.

Some of the features of TONE TOP 300 is shown below:

 Rotating Speed

 Torque (kg.m)  Hyd. Pressure (kg/cm2)
 Low Speed  0-60  500  200
 High Speed  0-120  250  220

Loading Capacity: 7,000 kg


Type: Hydraulic Cylinder Wirefeed
 Stroke: 7.5m
 Pulldown force: Max 3,200 kg (at 50 kg/cm2 pressure)
 Holdback force: Max 7,000 kg (at 155 kg/cm2 pressure)

Mud Pump

Type and name: Tone Model "NP-700" duplex reciprocating mud pump
 Capacity: 615 l/min
 Max Pressure:22 kg/cm2
 Suction size: 100 mm (4")
 Delivery Size: 50 mm

A 8" diameter borehole 100m deep can be drilled in two shifts using down the hammer drilling method. Furthermore, a 60m deep borehole can be completed in three days using mud rotary drilling method on semi-hard formations.