power tools
examples of on off power switch:
routers, planers, laminate trimmers, table saws, scroll saws and vibratory sanders
Electric tools must either have:
a three-wire cord with ground and be grounded, be double insulated, or be powered by a low-voltage isolation transformer.
Central Tool Control:
ensures uniform inspection and maintenance of tools by a trained employee.
portable circular saw switches are:
equipped with a constant pressure switch or control that will shut off the power when the pressure is released.
Pneumatic power tool main hazards:
getting hit by one of the tool's attachments or by some kind of fastener the worker is using with the tool. Noise is another hazard.
A tool that is too light may not only fail, but:
may cause undue fatigue to the operator and create a risk of injury
Hazards are usually caused by:
misuse and improper maintenance
Clean power tools with:
recommended nonflammable and nontoxic solvent. use air drying in place of blowing with compressed air.
Don't use compressed air for cleaning, unless:
reduced to less than 30 p.s.i. with effective chip guarding and PPE
Phillips screwdrivers and many other types of srewdrivers are:
safer than the flat blade screwdriver because they have less tendency to slip
Pneumatic power tools are:
Tools operated by air pressure that include drills, wrenches, sanders, chippers, etc.
A properly dressed tool is:
a safe and effecient tool
All hoses exceeding 1/2-inch inside diameter shall have:
a safety device at the source of supply or branch line to reduce pressure in case of hose failure.
The misuse of hand tools is:
a source of many injuries to industrial workers
Powder-operated tool shall be supplied with:
a standard spall shield
Routers:
have an ability to perform an extensive range smooth finishing and decorative cuts.
Controls for routers include:
noise protection, local exhaust or respirators and enclosure guard around the rotating router bit.
Never use a pipe wrench:
on nuts or bolts, valves or small brass, copper, or other soft fittings that may be crushed or bent out of shape.
Most electrical shocks from tools are caused by:
the failure of insulation between the current carrying parts and the metal frames of the tools
For reciprocating saws, to minimize blade flexing and to provide a smooth cut:
use the shortest blades that will do the job
Filters, regulators, and lubricators should be:
used to keep the air system working at its best.
Do not use:
wrenches when jaws are sprung impact tools (chisels and wedges) when heads have mushroomed tools with loose, cracked or splintered handles a screwdriver as a chisel
The use of hoses for hoisting or lowering tools:
shall not be permitted.
Explosive-actuated fastening tools shall meet:
"American National Standard Safety Requirements for Explosive-Actuated Fastening Tools," ANSI A10.3-1970.
Disconnect the air supply when you are to be:
25' from the gun
Nail no closer than:
3" to the edge of corner of concrete or brick; or ½" for steel
Maximum velocity of loads is:
300 feet per second
Portable drill precaustions:
Always use the auxiliary drill handle when provided. Be sure the chuck is tightly secured to the spindle.
Portable drills are:
Available in a variety of types and capacities, portable power drills are undoubtedly the most used power tools.
Portable power tools are divided into five primary groups according to their power source:
Electric Pneumatic Hydraulic Powder-actuated Gasoline
Pneumatic nailers shall be so designed so that:
It will not operate other than against a work surface. It will not operate when the tool is tilted. Means of varying the power are available. It shall not discharge a fastener while loading or during preparation to fire, or if the tool should be dropped while loaded.
All hazards involved in the use of power tools can be prevented by following basic safety rules:
Keep all tools in good condition with regular maintenance. Use the right tool for the job. Examine each tool for damage before use. Operate according to the manufacturer's instructions. Use provided guards!! Provide and use the proper personal protective equipment.
Hand Tool Safety Rules:
Maintain regularly Use right tool for the job Inspect before use Operate according to manufacturers' instructions Use the right personal protective equipment (PPE) Employees and employers have a responsibility to work together to establish safe working procedures. Around flammable substances, sparks produced by iron and steel hand tools can be a dangerous ignition source. Where this hazard exists, "spark-resistant" or "non-sparking" tools must be used.
Machine guards must protect the operator and others from:
Point of operation In-running nip points Rotating parts Flying chips and sparks
Portable circular saws are:
Probably the most commonly used power saw and perhaps the most commonly abused.
When nailing thin material:
Use ¾" plywood backing on the opposite side of the wall
Chain saws are:
Used for rough cutting timber and lumber, very common in logging industry! Gasoline and electric powered
Portable belt sanding machines are:
Used for rough sanding a surface and Sanding belts of different lengths, widths and grit!
Powder-Actuated tools are:
activated by an explosive charge (commonly a "22 caliber") Commonly used as a fastening device
Before making or breaking any air connection:
always turn off the air supply
Pneumatic-impact tools require two safety devices, what are they:
an automatic-closing valve and a retaining device
Soldering irons:
are the source of burns and of illnesses that result from inhaling the fumes.
Pneumatic nailers-the muzzle end of the tool shall have a protective shield or guard:
at least 3 1/2 inches in diameter, mounted perpendicular to and concentric with the barrel, and designed to confine any flying fragments or particles that might otherwise create a hazard at the time of firing.
Powder-operated tool-In case of a misfire, the operator shall hold the tool in the operating position for:
at least 30 seconds
Tool retainers shall be:
be installed on each air hose and connection piece of utilization equipment which, without such a retainer, may eject the tool
These tools are made of metals such as:
brass, bronze, copper-aluminum alloys, copper-beryllium alloys, and titanium.
Typical injuries caused by portable power tools are:
burns, cuts, and strains
Hand gurad chain brake is critical for:
chain saw guarding
Do not redress or reshape tools having:
chipped, battered, or mushroomed striking or struck surfaces
examples of constant pressure switch:
circular saw, chain saw, grinder, drill, belt sander and miter saw
HAVS:
hand-arm vibration syndrome. Also known as Reynaud's syndrome and vibration white finger. It is a disease entity characterized by circulatory disorders that include blanching and numbness of fingers; loss of dexterity; and, more severe cases, permanent disability affecting a worker's muscle, bone, nerves, and joints of fingers and hands.
Special power tools include:
hydraulic, gasoline-powered, and powder-actuated equipment.
Pneumatic Nailers-The tool shall be so designed that it cannot be fired unless:
it is equipped with a standard protective shield or guard, or a special shield, guard, fixture, or jig.
Protect air hoses on the floor from trucks and pedestrians by:
laying two planks on either side fo them or by building a runway over them.
Hand tools are:
non-powered. They include anything from axes to wrenches.
Constant pressure switch:
shuts off power upon release
Workers using power tools may be exposed to these hazards:
struck by objects that fall, fly, are abrasive, or splash harmful dusts, fumes, mists, vapors, and gases contact with point of operation Electrocution from frayed or damaged electrical cords, hazardous connections and improper grounding
Replacing a and tool with a power tool designed for the same purpose may mean:
substituting electrical or mechanical hazards for relatively less serious manual hazards.
Injuries result because:
supervisors assume that everyone knows how to use common hand tools