Technical Information技術的な案内
Unable to core
The bit spins but stops cutting, or progress is very slow.
Cause
Solution
The bit is glazed (smooth diamonds).
Re-sharpen the tool by drilling into abrasive material such as sandstone or block.
Rotation speed is too high.
Adjust the speed of rotation.
Too much coolant makes the core bit aquaplane.
Reduce the water flow.
The machine is badly fixed.
Check that the machine is fixed correctly.
The motor is too weak.
Match the motor power to the diameter. If necessary, change equipment.
Too much feed pressure.
Open the bit with abrasive material (sand pot, concrete block, chop saw blade) and reduce feed pressure. An ammeter helps control speed and pressure.
Aggregate is too hard.
Use a softer bond.
Source: Shibuya Overview Catalogue, Technical Information.