They offer the convenience electric drill-
ing when electrical supply not available extension cable is
impractical. Silicon carbide discs are suitable for cutting slate,
marble, tiles, brick and concrete, and aluminium oxide discs for cutting
iron and steel such conduit and trucking.
Angle grinders are useful for cutting chases brick concrete. 7.
Hammer drills give between two and three thousand impacts per minute
and are used for drilling concrete walls and floors.
Jigsaws can fitted with wood metal cutting blades. Wire brushes are made which into
the drill chuck for cleaning the metal. The discs
are interchangeable.5. With a
metal cutting blade fitted, they may used cut trunking.
Electric drills are probably used most frequently all electrical tools. Some useful electrical tools are shown Fig.Tools and equipment used for electrotechnical applications
143
in good condition and appropriate for the purpose for which they are
used.
When lot trunking work undertaken, electric nibbler a
worthwhile investment.5
Electrical hand tools. Variable-speed electric drills, which
incorporate vibrator, will also drill brick and concrete easily wood
when fitted with masonry drill bit.
Safety First
Power Tools
Many construction sites now only
allow
● Low voltage tools
● PAT tested tools
● battery powered tools.
.
FIGURE 7. Many construction sites now insist low voltage battery tools
being used which can further increase safety without any loss produc-
tivity. They
may used drill metal wood. With wood cut-
ting blade fitted they are useful for cutting across floorboards and skirting
boards any other application where padsaw would used. This nibbles out the sheet metal, easily control-
lable and one alternative the jigsaw..
Cordless electric drills are also available which incorporate rechargeable
battery, usually the handle
