IEC 62841-3-1:2014 pdf download – Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery – Safety – Part 3-1: Particular requirements for transportable table saws.
19.104 Saw blade guard and anti-kickback device system requirements 19.104.1 When setting up the table saw in accordance with 8.1 4.2 a), between any configurations for – through cutting; – non-through cutting; – or any operation not requiring the function of the riving knife then the removal, installation or positioning, as applicable, of the – saw blade guard; – riving knife; – anti-kickback device, if any; – or any combination of the above shall be accomplished within 30 s. After setting up the table saw for these configurations, there shall be no further need for realignment or adjustment of the applicable devices. The above requirement is not applicable, if the table saw is designed with a non-removable fixed extended riving knife that has a non-removable saw blade guard. Compliance is checked by inspection, by manual test and by measurement. The manual test is conducted after the operator has carried out the required operations, in accordance with 8.14.2 a), at least ten times. The storage of the saw blade guard, riving knife and/or any anti-kickback device as well as the removal or installation of the cutting tool, is not included in the 30 s time requirement.
19.104.2 The saw blade guard mounted to an extended riving knife, the extended riving knife and the anti-kickback device, if any, shall be designed to meet the following requirements: a) The saw blade guard shall be mounted to the extended riving knife, independently or in combination with the anti-kickback device. The removal of the saw blade guard shall not affect the performance of the extended riving knife. b) The anti-kickback device shall be capable of being disabled or removed without influencing the performance of the saw blade guard function and of the extended riving knife. The above requirement is not applicable, if the table saw is designed with a non-removable fixed extended riving knife that has a non-removable saw blade guard. Compliance is checked by inspection. 19.104.3 The saw blade guard, anti-kickback device, if any, riving knife, rip fence, cross-cutting fence and the push stick shall have provisions on the table saw for storage where it does not obstruct the cutting process or any adjusting or operating device(s). Compliance is checked by inspection.
The fixed extended riving knife or the adjustable extended riving knife in the extended riving knife position, within its construction limits, is adjusted to its minimum radial distance to the saw blade near the top of the saw blade, in accordance with 19.103.3 b). Test blocks having a minimum length of 500 mm, and having sufficient width for the saw blade guard to remain in contact with the top surface of the test block and a thickness as specified in test 1 and test 2 below, is guided by the rip fence on the table top with the block to be cut down the middle of the width. The front edge of the test blocks shall be perpendicular to the table top and at 0° mitre angle. For slide saws the test is carried out with the slide mechanism locked in a stationary position. 1) A test block having a thickness equal to the cutting capacity, for the appropriate bevel and depth of cut settings, shall move without any interference during the cut from the front to the back end of the table. 2) The saw blade guard shall not allow contact of the test blocks with the saw blade if the test block is 10 mm thicker than the test blocks used in test 1 for each depth of cut setting at the 0° bevel setting, and if the test block is 6 mm thicker than the test blocks used in test 1 for each depth of cut setting at the 45° bevel setting (or at maximum bevel setting permitted by design, whichever is smaller).