Te tirotiro haumaru me te paerewa o te matau

Tuhinga o muamatau
1. The matau used in the lifting mechanism driven by manpower is tested with 1.5 times the rated load as the inspection load.
2. The matau used for the power-driven lifting mechanism shall be tested with 2 times the rated load as the inspection load.
3. Whai muri i temataukua tangohia mai i te kawenga tirotiro, kia kaua e kitea nga koha, te rerekee ranei, a ko te pikinga o te tohu whakatuwhera kaua e neke ake i te 0.25% o te rahinga taketake.

4. Mo temataus that have passed the inspection, a mark should be printed in the low-stress area of the matau, including the rated lifting weight, factory mark or factory name, inspection mark, production number, etc.

Paerewa pakaru momataus
Ko temataume whakakore atu i te wa e puta ana tetahi o nga ahuatanga e whai ake nei:
â ‘Ngatata;
â‘¡ Ko nga waahanga kakahu ka tae ki te 10% o te rahi taketake;
â ‘¢ Kua whakapikihia te tohu whakatuwhera 15% kua whakaritea ki te rahinga taketake;
④The torsion deformation of the matau body exceeds 10°;
⑤The dangerous section of the matau or the neck of the matau is plastically deformed;
⑥The matau thread is corroded;
⑦When the wear of the matau bushing reaches 50% of the original size, the bushing should be replaced;
⑧ A, no te mandrel o te waahangamataukua mau ki te 5% o te rahi taketake, me whakakapi te mandrel.