GB/T 3883.306-2017Safety of motor-operated hand-held,transportable and garden tools—Part 3: Particular requirements for transportable diamond drills with liquid systems (English PDF)

3.101 diamond drill

tool with liquid supply system used to drill stone and concrete through diamond head, including at least one drill unit and one fixed drill stand; the drill stand may be connected with to-be-drilled workpiece through fastener, vacuum device or other suitable device, as shown in Figure 101, or may be fixed on a suitable support, e.g., scaffold

3.102 drill unit

device composed of one motor and one drilling head fastener

3.103 drill stand

device supporting the drill unit on its operating position

3.104 liquid collection device

device collecting liquid and grout during drilling

5.17

Addition:

Auxiliary handle (if any) and drill stand are regarded as the devices and auxiliaries needed during normal use.

8.1

Addition:

Diamond drill shall be marked with:

——Rated no-load speed, r/min or min-1.

8.3

Addition:

Diamond drill shall be marked with:

——Maximum diameter of drilling head, mm.

8.14.1.1

Addition:

Safety warning of diamond drill:

——When the operation needs water during drilling, it shall be ensured that the working area of the operator has no water or liquid collection system is used. Such preventive measure can ensure dry working area and reduce the risk of electric shock.

——During operation, when the cutting attachment may touch concealed wire or its cord, grip the tool through insulated gripping face. If the cutting attachment touches live conductor, the exposed metal part of the tool will be charged and the operator will be subject to electric shock.

——When operating diamond drill, put on ear protector, because the noise may cause deafness.

——When the drilling head is blocked for rotation, stop applying downward pressure and turn off the tool. Inspect and take proper actions to eliminate the reason of drilling head blocking.

——If the diamond head is in the workpieces, inspect whether the drilling head can rotate freely before restart. If the drilling head is stuck, it can not be started, because it will cause tool overload or the diamond drill will be separate from the workpiece.

——When fixing the drill stand and workpieces with fastener, ensure that fastening device used can control the tool in the using process. If the workpiece is fragile or has many holes, the fastener may be separate from it, which will result in the drill stand separating from the workpiece.

——When fixing the drill stand on the workpiece with vacuum pad, the vacuum pad shall be installed on a smooth, clean and imporous surface, and shall not be fixed on the laminating surface (e.g., tile and composite coating). If the workpiece is not smooth, flat or sticky, the vacuum pad may move on the workpiece.

Note 1: If there is no vacuum pad when using the tool, the above-mentioned warnings may be omitted.

——Adequate vacuum degree shall be ensured before hole drilling. If vacuum degree is inadequate, the vacuum pad may fall down from the workpiece;

Note 2: If there is no vacuum pad when using the tool, the above-mentioned warnings may be omitted.

——It is forbidden to use the tool fixed only with vacuum pad to carry out drilling-up operation. Once the vacuum fails, the vacuum pad will fall down from the workpiece;

Note 3: If there is no vacuum pad when using the tool, the above-mentioned warnings may be omitted.

——When drilling wall or ceiling, it shall ensure that the personnel and the working area at the other side of the wall or ceiling are safe. The drilling head may penetrate the hole or be drilled out from the other side;

——When drilling with water source, drilling up cannot be done, because the risk of electric shock may be increased when the water enter the tool;

Note 4: The above-mentioned warnings are not applicable to the tools incapable of drilling up.

——During drilling up, the liquid collection system specified by the manufacturer shall be used all the time. It's forbidden for the water to enter the tool. When the water enters the tool, the risk of electric shock will increase.

Note 5: The above-mentioned warnings are only applicable to the tools capable of drilling up.

8.14.2a) Addition:

101) Information of diamond head matched with the tool;

102) Guidance and information on how to install the tool on the drill stand;

103) Information on how to install diamond head on the tool, if applicable, add information on how to install diamond head auxiliaries.

104) Guidance and information on how to fix the drill stand on all suitable positions;

105) For the tool with vacuum fixing device:

——Guidance and information on how to inspect the fixed surface of drill stand;

——Additional guidance on how to fix the drill stand during directional drilling (except for the case of drilling vertically down) using suitable accessories or mode;

——Minimum vacuum degree required for safety operation and information on control during drilling operation;

——Information on maximum diameter of drilling head used along with vacuum fixing device;

106) For the tool with liquid collection device and available to drilling up:

——Information on minimum and maximum diameters of drilling head used along with liquid collection device;

107) It is recommended to use the residual current protective device with an operating current value less than or equal to 30mA.