portable power and air tools Flashcards
GFCI stands for what
ground fault circuit interrupter
what three kind of protection does a GFCI provide
overload
overcurrent
ground fault protection
electric impact wrench requires how many volts
110v
common drives for impact wrenches
square 1/2 and 3/8 drives
what is not designed for impact tools
sockets
swivels
extensions
3 common chuck capacities
6mm(1/4)
9mm(3/8)
12mm(1/2)
the larger the chuck capacity equals what
the lower rpm and the higher the torque
keyless chucks tend to have a higher what
gripping power compared to a conventional chuck
heavy duty drills usually have what size chuck capacity
12mm(1/2)
right angled drills are deigned for what
close quarter drilling
hammer drills are used for what
drilling holes in masonry
concrete
hard materials
hammer drills bits have what on the end
carbide tip
hammer drills can also be used for what
jack hammering
chiseling
grooving
rough concrete surface
two portable angle grinders
electric
pneumatic
what are die grinders used for
polishing workpieces or removing burrs
heavy air grinders are used for what
rapid removal of metal
what is he use of wire wheels
clean workpiece of dirt and scale (they do not move metal)
what are buffer wheels used for
polishing workpieces
buffer wheels are made of what
cloth and charged with a very fine abrasive
what is the best protection against injury
care and good judgement
general purpose grinding disc
aluminum oxide
sanding discs are used for what
light finishing, deburring and chamfering
flap wheels consist of
strips of coated abrasive attached to a hub
the higher the voltage
the greater the power of the tool
ANSI stand for what
American national standards institute
what does ANSI recommend
support handles on drills with chuck capacities over 3/8 inch (10mm)
hand and foot vibrations cause what medical problems
carpal tunnel syndrome
tendonitis
repetitive stress
no job is so urgent that
you cannot do it safely
3 mian types of portable air tools
rotary tools
percussive tools
nozzles
die grinders can operate at what speeds
20,000 rpm
angle grinders can operate at what speeds
7,500 rpm
undirectional vane motors are used in what
air grinders and sanders
air drills and screwdrivers can either be
unidirectional or bidirectional
impacts and splines drives are
bidirectional
4 basic. pneumatic drill designs
pistol grip
in line
heavy-duty drills with support handles
pneumatic screwdrivers
pistol drills are sure for
medium duty drilling
in line pneumatic drills are used for
light duty work only
examples of percussive tools
chipping hammer
scaling hammer
jackhammer
air nailers
engraving tools
what are nibblers used for
cutting thin metal plate quickly and easy
purpose of a GFCI
it sense a drop in current and switches off the power to the portable electric tool
