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