R 408.41933 Portable powered tools; controls.

Rule 1933. (1) A hand-held powered circular saw which has a blade diameter of more than 2 inches; an electric, hydraulic, or pneumatic chain saw; and a percussion tool without positive accessory holding means shall be equipped with a constant-pressure switch or control that shuts off the power when the pressure is released. A gasoline- powered, hand-operated tool shall be equipped with a constant-pressure throttle control. A throttle position lock may be provided for starting only. (2) All of the following tools shall be equipped with a constant-pressure switch or control and may have a lock-on control if the tool can be turned off by a single motion of the same finger or fingers that turn it on without release of the grip on the tool: (a) A hand-held powered drill. (b) Tapper. (c) Fastener driver. (d) Grinder with a wheel more than 2 inches in diameter. (e) Disc sander with a disc more than 2 inches in diameter. (f) Belt sander. (g) Reciprocating saw. (h) Saber saw. (i) Scroll saw. (j) Jigsaw with a blade shank more than a nominal 1/4 inch. (k) Similarly operating power tool. The lock-on control of a drill of more than 3/8-inch capacity shall not be used when the drill is held in the hand to drill, clean, or enlarge a hole. (3) All of the following hand-held powered tools may be equipped with either a positive on-off control or other control as prescribed in subrules (1) and (2) of this rule: (a) A platen sander. (b) Grinder with a wheel 2 inches or less in diameter. (c) Disc sander with discs 2 inches or less in diameter. (d) Router. (e) Planer. (f) Laminate trimmer. (g) Nibbler. (h) Shear. (i) Saber saw. (j) Scroll saw. (k) Jigsaw with a blade shank of nominal 1/4 inch or less. (4) The operating control on a hand-held power tool shall be located so as to prevent accidental operation.