Section R. 408.12730 - Radial sawsRule 2730.
(1) The upper hood shall completely enclose the upper portion of the blade down to a point that will include the end of the saw arbor. The upper hood shall be constructed of not less than 14 gauge minimum sheet metal or equivalent material that will protect the operator from flying splinters and broken saw teeth and will deflect sawdust away from the operator. The teeth of the lower exposed portion of the blade shall be guarded to the full diameter of the blade by a device that will automatically adjust itself to the thickness of the stock and remain in contact with the stock being cut to give maximum protection possible for the operation being performed.(2) In place of the requirements in subrule (1) of this rule, which require that the sides of the lower exposed portion of the blade be guarded by a device that will automatically adjust itself to the thickness of the stock being cut to give maximum protection possible for the operation being performed, both of the following apply: (a) The employer is not required to provide an automatically adjusting guard on that side of the lower exposed portion of the blade where the distance between the stock and the upper hood guard is less than 3/8 of an inch (lower side) for angle, bevel, or compound level cuts.(b) The employer may provide a specifically designed jig or fixture to protect the lower exposed portion of the blade in all cases where the distance between the stock and the upper hood guard exceed 3/8 of an inch (lower side) for angle, bevel, or compound bevel cuts. This specially designed jig or fixture shall provide protection for the operator which is equal to or greater than the protection required by subrule (1) of this rule.(3) A box-type guard as prescribed in Figure 2 or a permanently mounted guard as prescribed in Figure 3 or other fixed or adjustable barrier guard that restricts employee exposure to the saw teeth may be used to protect the operator from inadvertently coming in contact with the teeth of the bottom portion, from the front or sides, of the blade in lieu of the self-adjusting lower blade guard if the upper portion of the blade, including the saw arbor, is completely enclosed.(4) When radial saws are used for ripping, a spreader should be provided to comply with R 408.12723.(5) Non-kickback fingers or dogs shall be located on both sides of each radial saw used for ripping to oppose the thrust or tendency of the saw to pick up the material or throw it back toward the operator. They shall be designed to provide adequate holding power for all the thickness of material being cut.(6) An adjustable stop shall be provided to prevent the forward travel of the blade beyond the position necessary to complete the cut in repetitive operations. A limit chain or other equally effective device shall be provided to prevent the saw blade from sliding beyond the edge of the table or the table at that place shall be extended to eliminate overrun. The front end of the unit shall be slightly higher than the rear or shall meet the requirements of R 408.12728(3), so as to cause the cutting head to return gently to the starting position when released by the operator. The slope shall not be enough to cause rebound.(7) Ripping and ploughing shall be against the direction in which the saw turns. The direction of the saw rotation shall be conspicuously marked on the hood. In addition, a permanent label colored standard danger red that is not less than 1-1/2 inches by 3/4 of an inch shall be affixed to the rear of the guard at approximately the level of the arbor. The label shall read as follows: DANGER: Do Not Rip or Plough From This End |
(8) Figures 2 and 3 read as follows: FIGURE 2
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Dotted line in the bottom of guard shows possible relief if teeth are not exposed.
FIGURE 3
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D im. | Description | Requirements |
A | Width of guard between each side or front of blade to outside edge of guard. | 6 inches or twice "C", whichever is greater. Note: This dimension should be based on the greatest anticipated "C" distance. |
B | Distance between upper hood guard and box guard (Figure 2) or bottom of mounted guard and stock (Figure 3). | 3/8-inch maximum. |
C | Distance between top of work surface and bottom of guard. |
D | Distance between upper hood guard and fence. | 3/8-inch maximum. |
E | Distance allowed for saw blade travel in guard. | 1/4-inch maximum on each side of blade. |
Mich. Admin. Code R. 408.12730
1979 AC; 1980 AACS; 1983 AACS; 2018 MR 3, Eff. 2/20/2018