UL 745-2-31:2019 pdf download

This clause of Part 1 is applicable，except as follows:

1.1 Replacement:

This standard applies to diamond cord drills.

2Definitions

This clause of Part 1 is applicable,except as follows:2.2.23 Replacement:

Normal load denotes the load obtained when the drill placed in it's intended operating position， isoperated continuously, as recommended in the instruction manual to result in the highest load.

Additional definitions:

2.2.101 Diamond drill denotes a tool specifically designed to make holes in materials such as concretewith a diamond core bit.

lt is designed to rotate,normally in a clockwise direction, at one or more speeds.

3 General requirement

This clause of Part 1 is applicable.4General notes on tests

This clause of Part 1 is applicable, except as follows:

4.9 Replacement:

For diamond drills which have both a mechanical means of setting different ranges of speed and anelectronic means of setting the speed within a given range，the mechanical device is adjusted to thelowest range possible, and the electronic device is adjusted to the highest setting within the given range.