Geotextile Test Machine

Concrete core drilling machine is mainly used for building, highway, airport, wharf, dam and other hardened concrete, limestone core drilling, bending and compression test.

It has the advantages of simple operation, convenient moving, accurate drilling and coring, smooth core surface, and no accidental damage to the core. It is an indispensable equipment for highway transportation department, construction department and related colleges and universities. The drilling rig can also be used for drilling and coring other non-metallic brittle and hard materials, such as refractory, ceramics, glass and rock.

Main Technical Parameters:

Power	5.5hp/9hp/13hp
Bit material	thin wall diamond bit
Core diameter	less than 200 mm
Coring depth	less than 700mm (1500mm for customized extension rod or extension core pipe)
Spindle speed	900-1300r / min
Ambient temperature	5 ~ 40℃
Ambient humidity	≤ 85%
Weight	200kg
Dimension	1050x780 × 1250mm

Structure Principle:

1. Rack: rack is installed on the column, and four adjusting screws are installed on the base.

2. Sliding seat: set on the column, the internal gear and rack on the column form a gear pair, rotate the feed handle to make the sliding seat move up and down along the column.

3. Gearbox: it is fixed on the sliding seat, and the main shaft is equipped with a drill bit, which moves along with the sliding seat to achieve the purpose of drilling.

Matters Needing Attention:

1. When drilling, the resistance should be small and the cutting should be stable. The feed speed is about 4-5m / min. when the drilling is nearly finished, the drilling will vibrate due to the change of cutting force. At this time, the feed speed should be reduced appropriately. When the cutting is finished, the drill should be quickly lifted until the cutting edge is out of work, and the drilling machine and water source should be shut down.

2. Sufficient water cooling must be maintained throughout the drilling process

3. When the drill is rapidly lifted during drilling and after drilling, it is not allowed to stop. When the drill is just out of work, stop the spindle rotation and then lift the drill.

4. During drilling, if the bit is found stuck, the bit should be quickly lifted for a section, and then slowly drilled in, and the bit should not be damaged by hard drilling.

5. If the temperature of the motor exceeds 70 ℃ during drilling, it should be stopped temporarily and used after cooling.

6. Turn the switch button and turn the operating handle in a positive direction to make the drill bit contact the concrete surface slowly. After the drill bit is put into the groove, the drill can be pressurized.

7. If during drilling, the bit can not be drilled and the diamond part on the bit surface is not exposed completely, cutting with strong abrasion materials (such as firebrick, grinding wheel, etc.) is required. When the diamond on the bit surface is exposed completely, the hand mold surface layer is rough before drilling.