Reciprocating_Saws (Download)
Reciprocating Saws http://www.milwaukeetool.com/CMS/Publications/Super%20Sawzall%206538-21_FR.jpg 1 Introduction A reciprocating saw is a type of saw in which the cutting action is achieved through a back and forth motion of a toothed blade Typically used in the construction industry for demolition and rough cutting of drywall, metal, plaster , tubing, and wood Commonly referred to as a Sawzall http://en.wikipedia.org/wiki/Reciprocating_saw 2 Features and Controls http://www.milwaukeetool.com/CMS/Diagrams/58-14-4126d2.pdf Handle with Variable Speed Trigger Motor Insulating Boot Blade Clamp Front Handhold Saw Blade Adjustable Pivot Shoe 3 Operation http://www.milwaukeetool.com/CMS/Diagrams/58-14-4126d2.pdf For cutting from an edge, align the blade with the cutting surface before pulling the trigger Always hold the shoe flat against the work piece to avoid excess vibration 4 Operation http://www.extremehowto.com/xh/hotprod_images/4_2005_0414alligator0017.jpg For plunge cuts, rest the shoe on the work surface and with the blade about to contact the material, pull the trigger As the blade begins cutting, raise the handle of the saw until the shoe firmly contacts the cutting surface 5 Injuries Most injuries occur to the fingers, hands, and arms in the form of lacerations and amputations due to improperly handling the saw and not following safety guidelines Other reported injuries have occurred due to electrocution and collapsing loads http://www.associatedcontent.com/article/2536917/common_saw_defects_and_sawrelated_injuries.html 6 OSHA Statistics There were 10 fatalities involving reciprocating saws that were investigated by OSHA from 1990 thru 2009 Source: Extracted from OSHA Accident Investigation Data 1990-2009 Electrical Shock 50% Struck by Blade 10% Crushed by Debris 10% Struck by Debris 20% Heart Failure 10% 7 Fatalities A worker was demolishing an interior partition using a portable reciprocating saw when he was struck by debris from the partition, causing him to fall from a ladder. He died from his injuries. Source: Extracted from OSHA Accident Investigation Data 1990-2009 8 Fatalities A worker was cutting a ceiling joist when he hit a section of R omex electrical wire. He continued to saw which resulted in his electrocution . Source: Extracted from OSHA Accident Investigation Data 1990-2009 9 Fatalities A plumber was attempting to cut a hole in a roof when he lost control of the Sawzall and struck himself between his eye and temple with the blade. The plumber later died from his injuries. Source: Extracted from OSHA Accident Investigation Data 1990-2009 10 OSHA Regulations 1926.300(d)(2) Reciprocating saws…with blade shanks greater than a nominal one-fourth inch…shall be equipped with a constant pressure switch or control, and may have a lock-on control provided that turnoff can be accomplished by a single motion of the same finger or fingers that turn it on. http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10688 11 Personal Protective Equipment Leather or general work gloves To ensure proper grip on saw To protect hands from saw blade and debris Safety glasses To protect eyes from debris or broken blade http://guttercleaningtips.com/work-gloves/ 12 Safety Procedures Read Operating Instructions Before Use Avoid accidental s tarting by ensuring switch is off prior to plugging into outlet Check blade for breakage before each use http://www.milwaukeetool.com/CMS/Diagrams/58-14-4126d2.pdf 13 Safety Procedures Discontinue use if power switch is malfunctioning Remove blade tightening key or wrench before turning power on Use clamps or other restraining devices to secure and support work piece to stable platform http://www.milwaukeetool.com/CMS/Diagrams/58-14-4126d2.pdf 14 Safety Procedures Keep cutting edges sharp and clean Keep hands away from all cutting edges and moving parts When possible, keep the shoe flat against the material being cut Wear insulating gloves when cutting operations are performed where the blade may contact hidden wiring http://www.milwaukeetool.com/CMS/Diagrams/58-14-4126d2.pdf 15 Safety Procedures Do not h andle by the cord at any time Do n ot force through cutting material Do n ot overreach but keep proper footing and balance Disconnect from power before making any adjustments, changing accessories, or storing http://www.milwaukeetool.com/CMS/Diagrams/58-14-4126d2.pdf 16 Think Safety Work Safely 17