Power Tools

1
Power Tools Equipment

• Chapter 4

2
Compressed Air Systems

• Air Compressor-
• A machine by which outside air is drawn in,
  compressed into a tank or cylinder, and stored,
  so that its expansion or release may be utilized
  as a source of pneumatic power.

3
Compressed Air Systems

• The recommended maximum operating air pressure
  for a shop is 150psi.

4
Compressed Air Systems

• Quick Disconnect Couplings
• Quick disconnect couplings are designated as
  connecting devices designed to permit easy and
  immediate connection and separation of air or
  fluid for pneumatic or hydraulic lines without
  the need for tools.

5
Compressed Air Systems

• Air Pressure Regulator
• A pressure regulator automatically sets and
  controls the compressors operating pressure.
  Regulators are used to allow high-pressure supply
  lines or tanks to be reduced to safe and/or
  usable pressures for various applications.

6
Typical Compressed Air System
Compressor
7
Air Tools

• Pneumatic tools or air tools are tools driven by
  compressed air supplied by a compressor.
• Air tools need to be periodically lubricated to
  minimize wear and to assure maximum service life.
• Air wrenches are designed to remove and install
  metal fasteners, rapidly.

8
Air Tools

• Air impact rotation is typically controlled by a
  lever or button.
• Since the air tool has a great amount of power or
  torque, the technician must use great care not to
  damage bolts, nuts, or fasteners when using an
  air wrench.

9
Air Tools

• Air Ratchet-
• An air ratchet is used to work in hard-to-reach
  places where other tools might be difficult or
  impossible to use. The drive-end of an air
  ratchet is typically 3/8 inch square, however,
  they also come in ¼ or ½ sizes as well.

The air ratchet, like the air impact, does not
accurately tighten bolts or nuts, so a torque
wrench must be used for final tightening to
assure correct torque is applied to the bolts or
nuts.
10
Air Tools

• Air Hammer
• An air hammer is a device that uses highly
  pressurized air to drive a hammer into a work
  piece for shaping, scoring, or cutting. Air
  hammers have variable tips. For shaping and
  plenishing, a hammer tip is used. For scoring or
  cutting, a chisel tip is used. Whatever tip is
  used, it will be pounded thousands of times per
  minute into the targeted object, so operators
  must take care and use caution. The air hammer
  must be placed directly against the work surface
  to prevent the driven bit from flying out of the
  end of the tool and causing personal injury or
  damage. These tools are very noisy, so ear
  protection is a must.

11
Air Tools

• Solvent Gun-
• A solvent gun is used to clean parts that do not
  fit into a solvent tank. Care must be taken with
  the solvent used, not to contaminate the
  environment.
• Blow Gun-
• An air-powered blow gun is used to dry off or
  clean out the inside of hard to reach areas of
  parts. Caution must be used with the blow gun to
  prevent personal injury from air embolism. This
  happens when the air is injected into or under
  the skin. Only safety tipped nozzles should be
  used on blow guns.

12
Air Tools

• Air Drill-
• Features and Benefits Lightweight, compact size
  is easy to handle, and provides full power in
  forward and reverse drilling applications.
  Aluminum body with rubber handle grip. Easy
  control trigger for operator convenience and
  variable speed control.
• Rotary files and abrasive disks can be used with
  the air drill at slow speeds to clean heavy
  gasket deposits and de-burr rough metal edges
  easily.

13
Electric Tools

• Bench Grinder-
• Usually has two wheels, a grinding stone and a
  wire wheel. It may be used for sharpening cutting
  tools such as lathe tools or drill bits.
  Alternatively it may be used to roughly shape
  metal prior to welding or fitting.
• Wire brush or buffing wheels are often mounted in
  place of the grinding wheels and are used to
  clean or polish work-pieces.

14
Electric Tools

• Bench Grinder Safety Rules
• 1. The tool rest (or work rest) should be mounted
  slightly below the center of the grinding wheel
  with less than 3 mm clearance from the wheel.
  This prevents the work from jamming between the
  tool rest and the wheel.
• 2. Grinding wheels designed for steel should not
  be used for grinding softer metals, like
  aluminum. The soft metal gets lodged in the pores
  of the wheel and expand with the heat of
  grinding. This can dislodge pieces of the
  grinding wheel.
• 3. Wire brushes require particular attention for
  the safety of the operator and bystanders as the
  metal wires may become dangerous projectiles as
  they could bind with the object being brushed and
  so throw it away with great energy.
• 4. The machine needs to be securely mounted to a
  pillar or a bench to be used safely and
  effectively, often with an emergency stop switch
  or pedal fitted close by the machine, for use in
  emergencies.

15
Electric Tools

• Drill Bits and the Drill Chuck
• Drill bits are cutting tools used to create
  cylindrical holes. Bits are held in a tool called
  a drill, which rotates them and provides axial
  force to create the hole. They are commonly made
  of high-speed steel, while some specialized drill
  bits can be made of high-carbon steel or
  titanium. The drill bits are clamped into the
  drill chuck using the chuck key to tighten it.
  The drill motor is usually sized by the largest
  diameter drill bit that will fit into the drill
  chuck. Common chuck sizes include ¼, 3/8, and
  ½.

16
Electric Tools - Parts of a Drill Press
A bench-top or stationary power tool used to spin
a drill at a controlled speed, a controlled
location, and to a controlled depth. The drill
press gives you precision and controlled drilling.
17
Electric Tools

• 5 Drill Press Safety Rules
• 1. Be careful not to drill into the vises or
  drill press table.
• 2. Use vises clamped to the drill press table if
  there is the chance that your work piece might
  spin when drilling.
• 3. Only change drill press speed while the drill
  press is running.
• 4. Do not run the drill speed too fast. If you
  hear any squeaking, the drill speed is too fast
  or you are not plunging fast enough. Ask for help
  if you are not sure what speed to use.
• 5. Be sure to clean up the drill press table top,
  base, and surrounding floor immediately when
  finished with the machine.

18
Hydraulic Tools

• Hydraulic tools use high pressure fluid to exert
  the necessary forces. Examples of Automotive
  Tools that are hydraulic include
• Floor Jack
• Transmission Jack
• Bottle Jack
• Vehicle Hoist
• Engine Hoist

19
Hydraulic Tools
Floor Jack
Bottle Jack
Transmission Jack
Engine Hoist
Vehicle Hoist
Hydraulic Press
20
Hydraulic Tools

• Floor Jack Used to lift vehicles by placing
  under the frame, suspension arms, or specific
  lift points.
• Transmission Jack Used to raise and lower
  transmissions during clutch jobs and transmission
  repairs. It uses specially designed attachments
  to hold the transmission securely to the jack and
  allows the unit to be tilted as necessary to
  facilitate transmission installation.
• Bottle Jack Has many varied lifting
  applications.
• Vehicle Hoist Used to raise vehicles in order
  to make repairs under the vehicle faster and more
  convenient.
• Engine Hoist Used to remove and install engines
  or other heavy engine parts, such as intake
  manifolds or cylinder heads.
• Hydraulic Press used to remove, reassemble, and
  re-install bearings, gears, shafts, and other
  subassemblies requiring great controlled pushing
  or pulling force.

21
Other Shop Equipment

• Arbor Press is similar to a hydraulic press but
  uses a screw type jack to exert force.

22
Other Shop Equipment

• Jack Stands Never work under or around a
  vehicle that is not properly supported by jack
  stands!

23
Other Shop Equipment

• Engine Stand Once the engine has been removed
  from the vehicle, it can be mounted securely to
  an engine stand to facilitate working on the
  engine.

24
Other Shop Equipment

• Cold Solvent Tank contains a cleaning solution
  used to sanitize automotive parts and
  subassemblies before repair and reinstallation.

25
Other Shop Equipment

• Pressure Washer - A pressure washer is an engine
  powered device that uses high-pressure water to
  remove deposits of dirt and grease from
  automotive assemblies and subassemblies.

26
Other Shop Equipment

• Oxy-Acetylene Torch - An Oxy-Acetylene torch is
  used to weld metals. Welding metal results when
  two pieces are heated to a temperature that
  produces a shared pool of molten metal. The
  molten pool is generally supplied with additional
  metal called filler. Filler material depends upon
  the metals to be welded.
• In Oxy-fuel cutting, a cutting torch is used to
  heat metal to kindling temperature. A stream of
  oxygen then trained on the metal combines with
  the metal which then flows out of the cut (kerf)
  as an oxide slag
• Oxy-fuel welders can also be used for heating and
  bending metals. By controlling the rate of cool
  down different hardness of metal can be achieved.

27
Other Shop Equipment

• Oxy-Acetylene Torch

28
Other Shop Equipment

• Battery Charger - An electronic device that
  provides a controlled voltage and current to a
  battery to maintain the battery in a fully
  charged state

CAUTION! Car batteries that are being charged,
give off hydrogen gas which is flammable and
explosive. Keep open flame and sparks away from
battery! Always unplug charger before
disconnecting clamps from battery!
29
Other Shop Equipment

• Drop Light - provides light when working under
  the hood or under a vehicle.

30
Other Shop Equipment

• Jumper Cables can be used to start a vehicle
  with a dead battery by connecting to another
  vehicle that has a good battery.

31
Other Shop Equipment

• Creeper - is used by a technician to lay on when
  working under a vehicle, and should always be
  stood up out of the way when not in use.

32
Other Shop Equipment

• Tool Carts or Utility Carts are used to hold a
  limited number of tools for easy access for a
  specific task.

33
Other Shop Equipment

• Fender Covers - protect the finish and visual
  appearance on any vehicle being worked on.

34
QUESTIONS?

• CHECK THE TEXTBOOK IF YOU CAN NOT FIND SOME OF
  THE ANSWERS!
• THEN CHECK WITH THREE OTHER STUDENTS TO FIND THE
  ANSWERS!
• FINALLY, CHECK WITH THE INSTRUCTOR
• Sincerely, Mr. Bloom