How to use a good composite diamond drill bit is the key to achieving drilling results. In actual production, due to improper usage, drill bits often wear out prematurely. To ensure the normal use of diamond drill bits, it is necessary to strictly follow the requirements below:

　　How to use good compositesDiamond drill bitis the key to achieving drilling results. In actual production, due to improper usage, drill bits often become prematurely unusable. To ensure the normal use of diamond drill bits, strict adherence to the following requirements is necessary:

　　1) A reasonable grade of diamond drill bit should be selected, ensuring stable operation and avoiding damage to cutting teeth due to unbalanced forces.

　　2) The impact resistance of diamond drill bit cutting teeth is weak; they should be gently placed during transportation and handling. It is strictly prohibited to drill, hit, bump, or throw. Drill bits should be stored in a dry and well-ventilated environment.

　　3) To take out the diamond drill bit from the box, soft materials should first be used for padding. Avoid contact with steel or other hard materials or rolling the drill bit to prevent damage to cutting teeth and screws.

　　4) Before using the diamond drill bit, a site inspection of all parts must be conducted. This includes checking if the drilling diameter meets requirements, if connection threads are damaged, if cutting teeth are damaged, if there are foreign objects in the hole, and if the water tank is unobstructed.

       

　　5) When installing and removing diamond drill bits, a hammer should be used to tap on the drill bit to avoid damaging cutting teeth or diameter areas. Lubricating grease should be applied on threaded parts before installation.

　　6) Before drilling and during drilling, ensure that the drilling point is adjusted into a pit shape to prevent excessive movement of the drill bit that could cause damage. During drilling or after secondary drilling, light pressure should first be used with slow rotation and appropriate pump volume at depths of 0.2 ~ 0.3 meters; after completing the bottom shape of the hole, gradually increase the drill speed and pump volume evenly before proceeding with normal drilling procedures.

　　7) The descent speed must be slow to prevent rock probes or falling rocks from impacting the drill bit and cutting teeth. Before approaching the bottom of the hole with a diamond drill bit, turn on the pump for thorough flushing at the bottom while observing whether water flow is normal to prevent clogging of water holes in the drill bit.

　　8) Ensure that the bottom of the hole is clean during drilling; foreign objects such as fallen cutting teeth, hard alloys, or steel inside can lead to premature damage of directional drills.

　　9) Composite boards and diamond drill bits are welded with low-temperature solder; therefore, working drills must have sufficient circulating cleaning fluid for cooling and cleaning purposes. Water supply must not be interrupted during drilling operations to avoid accidents while preventing debris from repeatedly breaking down which affects tool life.

　　10) Drilling operations must be conducted cautiously; any abnormal vibrations or lack of particles along with significant increases or decreases in pump pressure or sudden drops in mechanical drilling speed or increases in torque must prompt immediate investigation; if necessary, inspection drills should be performed without applying pressure.

　　11) When directional drills encounter highly abrasive intermediate layers, wear on cutting teeth will intensify with increased rotation speed and drilling pressure. To extend diamond drill life, low-speed drills should be used whenever possible. In cases of geological changes or interlayers occurring for optimal hole life and speed performance adjustments in pressure and rotation speed must occur promptly.

　　12) Normal drilling should adhere to constraints based on product conditions involving both pressure and rotation speed; operations during drilling must proceed smoothly without abrupt lifting actions like heavy lifting or re-drilling.

　　13) Avoid using a drill head for enlarging holes whenever possible; if short sections require holes then small pressures combined with appropriate speeds along with high pump volumes should suffice.

　　14) In later stages of using diamond drills due to wear on cutting teeth increasing surface area under pressure necessitates an increase in drilling pressure accordingly maintaining consistent speeds throughout operations.

　　15) When using multiple heads on one same tool they need alternating usage starting from larger outer diameters followed by smaller ones subsequently.

　　Diamond drill bit有时会出现泥浆包装现象，影响正常钻孔，主要迹象是钻头速度和扭矩突然下降，泵压增加，此时清洗钻头是主要方法。就是将钻头从孔底抬起，然后打开较大的泵量和正常转速，清理钻头表面。