OHS Code Explanation Guide

Published Date: July 01, 2009
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Part 25 Tools, Equipment and Machinery

Section 377 Circular saw blades

The characteristics and conditions of circular saw blades are important safety factors for the operators who use them. Workers must follow the manufacturer’s specifications and instructions for care and use of saw blades.

It is good practice to inspect the saw blade for cracks every time the teeth are filed or set. As soon as a crack is detected, the blade should be removed from service. If cracked blades are left in service the crack may grow larger and cause partial fragmentation.

Circular saw blades with cracks of any size that are adjacent to the collar line of the saw, or with a crack anywhere else on the saw that exceeds the limits specified in Table 1 of Schedule 8 of the OHS Code (shown as Table 25.1), must be removed from service and either replaced or repaired before it is used again.

Table 25.1 Circular saw blade crack limits (appears as Table 1 of Schedule 8 in the OHS Code)

Saw Blade Diameter

Maximum Length of Crack

up to 300


301 to 610


611 to 915


916 to 1220


1221 to 1525


> 1525


A circular saw blade with a crack of any length that is located near the periphery (edge) must be removed from service and replaced or repaired. The blade may be returned to service if it is repaired or if the crack is prevented from getting longer by slotting, centre punching, drilling or another effective means.

Circular saws must be properly tensioned before being used. Saw blades that have not been tensioned properly may wobble which can cause a saw blade to fracture. After repairs are made to a circular saw blade, it must be retensioned by a person who has been specifically trained to do this.