Concrete drilling and coring machine

HZ-20 typeConcrete drilling and coring machineThe machine is powered by a gasoline engine (imported original engine) for easy starting, and is equipped with an artificial diamond thin-walled drill bit. Mainly used for concrete and asphalt pavement testing equipment in highways, airports, ports, dams, etc. This machine can take a depth of 700 centimeters and is mainly used for compressive and flexural tests on concrete and limestone foundations in high-grade highways.

Main technical parameters:

1. Large borehole diameter: 200mm
2. Large drilling depth: 700 (up to 1500mm when using extension rods or core tubes)
3. Output speed: 800-1200 revolutions per minute
4. Power: 5.5 horsepower (GXV160) Weight: 190kg
5. Power: 9.0 horsepower (GX270) Weight: 200kg
6. Power: 13 horsepower (GX390) Weight: 210kg
7. Supporting power: Honda gasoline engine

HZ-20 typeConcrete drilling and coring machineUsage:
(1) Install a hollow drill bit with a suitable diameter.
(2) Move the drill hole to the desired working location, fix the drill hole with expansion screws, adjust the foot screws to stabilize the drill, or fix the drilling and coring machine with a sufficiently heavy bottom plate to prevent the machine from moving during drilling and coring.
(3) Connect to the water source and check if there is any water flowing out.
(4) Start the generator and turn on the circuit switch.
(5) Rotate the handle to gently contact the drill bit with the cut area. When the drill bit cuts about 10mm, apply pressure through the handle to accelerate the rotation speed.
(6) After the cutting is completed, the drill bit can be kept rotating and lifted. When it is about 5mm away from the surface of the specimen, the power can be turned off, the drill bit can leave the surface of the specimen, and the water source can be turned off.
(7) Remove the fixing bolts, drag away the coring machine, and use pliers to take out the sample.
(8) When using, the drill bit should be prevented from hitting hard objects to avoid damaging the drill bit.

Notes:

1. When drilling, the feed rate should be ensured to be uniform, about 3-5cm/min. If the drill bit is found to be stuck, the feed rate can be appropriately reduced. If necessary, the drill bit can be lifted a section before slowly drilling in. Avoid hard drilling to avoid damaging the drill bit and machine.
2. Adequate water cooling must be maintained throughout the entire drilling process.
3. At the end of drilling, the machine can only be stopped when the drill bit is detached from the workpiece.
4. During the drilling process, overloading is not allowed. When the motor temperature exceeds 70 ℃ (which feels hot), the loading force should be reduced and a new drill bit should be replaced.