Document MGew7Veyr3Ov75ponqBJ5wrJk

Personal protective equipment All individuals m machine areas should wear safety glasses or face shields All workers should wear close-fitting ap parel without rings, bracelets, or other jewelry which may become entangled m moving ma chinery Loose sleeves or other loose clothing also possess the same danger Hair nets or caps should be worn to keep long hair out of moving parts, and gloves or hand pads can be worn to protect hands from splinters and rough lumber However, gloves should not be wom where there is any chance of being caught by the moving parts of ma chines, the rotating stock, etc Safety shoes should be wom when handling heavy material or when there is danger of foot injury See Chapter 19, "Personal Protective Equip ment," for details Sources There are a number of specific OSHA stand ards which require safety features on some woodworking machmes Most of these stand ards are based on American National Standard 01 1-1971, Safety Requirements for Wood working Machinery In addition, some states and other jurisdictions have codes which specify certain requirements All of these sources should be consulted The National Safety Council publishes data sheets on a number of woodworking machines See Ref erences Specific Safety Principles Circular saws There are two principal types of accidents involving circular power saws (a) blade cuts or abrasions, and (b) kickbacks These two kinds of accidents can be minimized by proper guarding and by establishing and enforcing safe work procedures Power saw operators are most frequently injured when their hands slip off the stock, while pushing it into the saw, or when hold ing the hands too close to the blade during the cutting opeiations Helpers and take-away men are mjuied by coming into contact with the blade while re moving scrap or the finished pieces from the table Poor housekeeping practices and sbppery floors are another source of accidents involv ing circular saws Circular saws are designed to permit a wide range of operations Therefore, as is the case with most multiple-use equipment, it is dif ficult to design one type of guard for maxi mum protection for all types of operations Contact with the saw blade can be prevented through use of the proper type of spreader, hood guard, jigs, fixtures, combs, or other devices Kickbacks. Kickbacks can cause serious in juries or death Therefore, they must be pre vented by every means possible Kickbacks on circular saws are usually caused by one of the following conditions 1 No spreader to prevent work from binding on blade 2. An improperly conditioned saw that allows the material to pinch on the outfeed edge of the saw and rise from the table A dull saw blade is often a contributing factor 3 Improper alignment of the gage or np fence It should be parallel to the saw blade to prevent the work from pinching between the rear of the blade and the fence 4 Lumber that has not been properly planed, is not square, or has a twisted grain 5 Attempting to ripsaw or crosscut stock too large to control on the table 6 Confining the cutoff piece whether ripping or crosscutting, such as between the blade and the fence when npping or being caught by the length stop when cross cutting 7 Ripping by applying feed force on the cut off piece Feed force for hand or power np feeding should always be applied on the stock between the saw blade and the fence 8 A sudden encounter with a knot or other hard matenal by the saw blade Kickbacks can be minimized by avoiding the causes mentioned The proper use of the spreader and the antikickback fingers (dogs) 813