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Unformatted text preview: Circular Saw Safety
Circular Saw Safety Circular Saw
Circular Saw Circular saws are power saws that use a spinning diskshaped blade, typically with a toothed edge Circular Saws
Circular Saws Should be considered extremely dangerous There are many different safety issues associated with circular saws
– Cordless – Battery Powered
– Cord for Electrical Supply Circular Saws
Circular Saws Could cause extreme body damage, including loss of fingers or limbs, even death Workers must be extremely careful One small slip up could cause a really bad accident Proper safety precautions are essential Statistics
Statistics A study of 226 Circular Saw Injuries – All were hand injuries 55% involved one finger only Thumbs most often Little finger – Least often Some bone cuts Some amputations Injury Reports
Injury Reports A worker was ripping wood into long lengths using a portable saw As he cut up the wood, he placed his left hand behind the saw to grip the wood he just cut This caused the wood to close in on the blade and the saw kicked backward (since it rotates clockwise) and cut his thumb off Cords
Cords A worker was nailing and trimming particle board on an 8/12 pitch roof of a house under construction.
He slid off the roof falling 30’ head first onto a piece of 2x4" debris. He appeared to slide off the roof feet first with the electrical cord from the a circular saw wrapped around his right leg. The cord was caught between the joist material, went taught, flipping the victim head first onto the wooden debris on the ground. He was pronounced dead at the scene OSHA Regulations
OSHA Regulations 1926.304(d) Guarding All portable, power driven circular saws
shall be equipped with guards above and
below the base plate or shoe. … When the
tool is withdrawn from the work, the lower
guard shall automatically and instantly
return to the covering position. Safety Precautions
Safety Precautions Wear Eye Protection Wear Hand Protection Wear Hearing Protection Wear Dust Mask Read the Instructions Before Operating the Saw Proper Safe Procedure
Proper Safe Procedure Make sure you are using the correct blade and that it's properly tightened. Always use a sharp blade. Dull blades bind and overheat. Check the blade guard and never disable it Set the depth of the blade properly (not over 1/4” deeper than the material thickness) to avoid kickback Proper Safe Procedure
•Select the correct blade for the type of cut being made and the type of material being cut. •Mark material so that a good visible line is present to help guide the cut. •Align the saw blade on the waste side of the cut line. • Safe Operation (cont.)
Safe Operation (cont.) Look for knots and nails before sawing. Be cautious when approaching them. Start the blade before it makes contact with the material to be cut. Stand to the side when sawing, in case the wood is kicked back Let go of the trigger if the blade binds, and stick a wooden shim in the cut to release it. Safe Operation (cont.) When cutting relatively thin material, support the material the full length of the cut, preferably on both sides of the cut Do not overreach when sawing When ripping material, use a ripping fence to maintain alignment Safe Operation (cont.)
Safe Operation (cont.) Route the cord so it does not tangle with the material being cut and keep the cord outof the way of the feet. Keep the cord away from the path of the saw. Always stand with both feet firmly positioned When possible, clamp the material to secure it while sawing Safe Operation (cont.)
Safe Operation (cont.) Keep both hands on the saw grips (never put either hand near any moving part of the saw) when two handles are provided Never reach under the material being cut Don’t operate the saw in the vicinity of other workers or persons Safe Operation (cont.)
Don’t set the saw down until after it has stopped rotating Always unplug the saw to make adjustments or to change blades. Saw Innovations
“Sawstop” is a new innovation that is available on table saws. The blade stops immediately (35 milliseconds) upon contacting flesh, by thrusting a brake into the blade as it retracts the blade. May be available on portable circular saws some day. The worst that can happen is a minor nick. Look for it for portable saws in the future. Circular Saw Safety
Circular Saw Safety
Work Safely Watch your fingers! ...
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This note was uploaded on 08/27/2011 for the course BCN 4735 taught by Professor Staff during the Spring '08 term at University of Florida.
- Spring '08