['Machine Guarding']
['Machine Guarding']
07/17/2024
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California’s state requirements regarding machine guarding include a substantial amount of regulatory information beyond the federal requirements.
To ensure that you are in compliance with these requirements, click on the following links to view the state and federal regulations regarding machine guarding:
Citations
California: Title 8, Chapter 4, Subchapter 7
Federal:
29 CFR 1910.212 General requirements for all machines.
29 CFR 1910.213 Woodworking machinery requirements.
A summary of the additional requirements includes the following:
- Guards must be provided with hinged or removable sections where it is necessary to change belts, make adjustments, or for the admission of lubricants.
- If the area of a shield guard of wire mesh or expanded metal in a frame exceeds 6 square feet, it must be reinforced.
- Horizontal overhead belt guard surfaces subject to contact with the belt must be smooth. The guard must be at least 25 percent wider than the belt being protected, but the clearance need not exceed 6 inches on each side.
- If employees pass under overhead rope and chain drives, a shallow trough or other effective means of sufficient strength to carry the weight of the broken chain must be provided.
- Where a guard or enclosure is within 2 inches of moving parts, openings through the guard must prevent the passage of any object one-half inch in diameter. If within 4 inches of moving parts, openings through the guard must prevent the passage of any object greater than one-half inch in diameter. If between 4 inches and 15 inches from moving parts, openings must prevent the passage of any object greater than 2 inches in diameter. Where a slatted guard is used, the width of the opening must not be greater than one inch.
- Standard railing guards must be placed at least 15 inches, but not more than 20 inches, from any moving parts.
- If lubrication has to be performed while a machine is operating, openings with hinged or sliding covers must be provided. If machines or machine parts have to be lubricated while in motion, the lubricant fittings must be at least 12 inches from the dangerous moving parts unless those parts are guarded and the fittings are piped outside the guard. Transmission equipment, machines, and machine parts in inaccessible locations that are lubricated while in motion must be equipped with extension lubricant fittings or other methods of lubrication that can be serviced from an accessible location.
- Keys, set screws, projections, or recesses that create a hazard not guarded by the frame of the machine or by location must be removed, made flush, or guarded.
- Each hand-fed table saw must be guarded by a hood; however, there is a choice between a hood that automatically adjust itself to the thickness of the material being cut or a fixed or manually adjusted hood provided that the space bewtween the bottom of the guard and the material being cut does not exceed ¼ inch.
- There are specific guarding requirements for miter saws, including a guard that encloses the upper half of the blade and at least 50 percent of the arbor end, and how the periphery of the lower blade teeth is to be fully guarded and the guard shall extend at least 3/4 of an inch radially inward beyond the root of the teeth.
- Meat cutting band saw blades. There are specific guarding requirements for meat cutting band saw blades, including a guard for the portion of the blade between the sliding guide and the upper-saw-wheel guard that must be easily hand adjustable by the saw operator, without the use of any tools, to raise and lower with the guide. The adjustable saw blade guard must be designed and manufactured so that the guard is capable of reaching the saw table. The guard must be adjusted as close as possible to the table without interfering with the movement of the material being cut. In addition, pusher plates must be used to hold the cut of meat against the gauge plate when slicing short ends to prevent the hands from nearing the cutting edge of the saw blade. Saw wheels must be fully guarded.
- Provisions dealing with microtomes, which use one or more mechanical actions to section off extremely thin slices of tissue for microscopy samples for observation under transmitted light or electron microscopy. See 3558, Microtomes (manual, semi-automatic and automatic).
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Copyright 2024 J. J. Keller & Associate, Inc. For re-use options please contact copyright@jjkeller.com or call 800-558-5011.