Engineering Machine Shop

Please note: The size of your grinder determines the type of control switch allowed. The Health and Safety at Work Act 2015 (HSWA) requires that hand-held abrasive grinders have a constant pressure control switch. However, the standard AS/NZS 60745.2.3 allows smaller grinders (no greater than 100mm) to have a lock-on switch, as long as two different actions are needed to lock the switch.

For good practice:

• Grinders over 100mm must not have a lock on switch (use hold-to-run instead)

• Grinders under 100mm may have a lock-on switch,https://www.worksafe.govt.nz/topic-and-industry/machinery/metalwork-machinery/