AS NZS 62841.3.4:2017 pdf free
AS NZS 62841.3.4:2017 pdf free.Electric motor-operated hand-held tools,transportable tools and lawn and garden machinery – Safety
The clamping nut shall be tightened with a first test torque according to Table 102. A feeler gauge of thickness 0,05 mm shall be used to check whether the flanges are in contact with the plate all around the circumference. It shall not be possible to push the feeler gauge between the flange and the surface of the plate by more than 1 mm at any point around the circumference of the flange, excluding any chamfer.
A simulated grinding wheel having a diameter equal to the maximum diameter marked on the tool spindle in accordance with 8.3 is mounted on the tool spindle. The bench grinder is then to be operated at no-load for 250 000 revolutions. The simulated wheel may consist of a circular steel plate. The simulated wheel is to be out of balance, by the addition or removal of material:
– for wheels less than 150 mm in diameter, by d2/1 607 Nmm, where d is the diameter of the wheel in mm;
– for wheels of 150 mm or more in diameter, by 14 Nmm.
After the test, the tool shall withstand the electric strength test of Annex D between live parts and accessible parts and live parts shall not have become accessible as specified in Clause 9. In addition, all guards shall remain intact.
Carrying means other than grasping surfaces on motor housings are subjected to a force corresponding to three times the weight of the equipment but not more than 600 N per carrying means. The force is applied in the direction of lifting uniformly over a 70 mm width at the centre of the carrying means. The force is steadily increased so that the test value is attained within 10 s and maintained for a period of 1 min.
If more than one carrying means is provided, the force is distributed between the carrying means in the same proportion as in the normal transportation position. If the equipment is provided with more than one carrying means, but so designed that it may readily be carried by only one carrying means, each carrying means shall be capable of sustaining the total force.AS NZS 62841.3.4 pdf free download.
