AS NZS 62841.3.12:2018 pdf free.Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery- Safety Part 3.12: Particular requirements for transportable threading machines.
19 Mechanical hazards
This clause of Part 1 is applicable, except as follows:
19.1 Replacement of the first paragraph:
Moving and dangerous parts other than the chuck(s), cutting head or workpiece shall be so positioned or enclosed to provide adequate protection against personal injury.
19.6 This subclause is not applicable.
19.8 This subclause is applicable for threading machines, if provided with:
— wheels; or
— a cart with wheels.
19.101 Run-down
The run-down of the tool spindle after switching off the motor shall be limited. Compliance is checked by the following test, which is performed ten times. The tool motor is switched on under no-load for a minimum of 30 s, then switched off. For
each test, the run-down of the spindle shall not exceed two revolutions.
20 Mechanical strength
This clause of Part 1 is applicable, except as follows:
20.5 This subclause is not applicable.
21 Construction
This clause of Part I is applicable, except as follows:
21.17 Replacement:
Threading machines shall be fitted with a power switch which is not a momentary power switch. The actuating member of this switch shall be easily visible and accessible from the operator’s position designated in 8.14.2 b) 101).
The machine shall also be fitted with a foot switch which is a momentary power switch without a lock-on device.
It shall be necessary that both the power switch and the foot switch are in the “on” position in order to operate the machine.
Compliance is checked by inspection.
21.18.2.1 Addition:
After voltage recovery, following an interruption of the supply, the tool shall not automatically restart. The foot switch as required in 21.17 is regarded as a momentary power switch.
21.18.2.3 Replacement:
The foot switch required in 21.17 shall be shielded so that unintentional movement to the“on” position is unlikely and the shield shall have sufficient strength.
Compliance is checked by the test of 20.3.2 and by the following test.
With the foot switch placed on a horizontal surface, it shall not be possible to activate the foot switch with a 12 mm diameter rod held perpendicular to the horizontal surface and applied in a perpendicular motion with a force of 50 N.AS NZS 62841.3.12 pdf download.