7.3.10 Power Tools Flashcards
What are the basic safety rules for using powered tools?
Keep all tools in good working order with regular maintenance. Use the right tool for the job. Examine each tool for damage before use. Operate according to the manufacturer’s instructions. Provide and use the proper personal protective equipment (PPE).
What must be done before using power tools?
Read and understand the manufacturer’s manuals supplied with tools and accessories.
What environments should be avoided when using power tools?
Do not use power tools in damp, wet, and/or explosive environments (fumes, dust, or flammable materials).
What should you be aware of in your work area when using power tools?
Be aware of all power lines, electrical circuits, water pipes, and other hazards, including those that can be below the work surface.
What personal protective equipment (PPE) should be worn when using power tools?
Wear appropriate PPE as recommended by the manufacturer. Do not wear loose clothing, dangling objects, or jewellery. Long hair must be tied back or placed under a cap.
What precautions should be observed when using power tools?
Never carry a tool by the electrical wire or hose. Never pull the wire or hose to disconnect it. Keep wires and hoses away from heat, oil, and sharp edges. Disconnect tools when not in use.
What should be done with damaged portable electric tools?
All damaged portable electric tools must be removed from use immediately and tagged ‘Do Not Use.’
What are the dangers of using electric tools?
The most serious danger is the possibility of electrocution.
What must electric tools have for safety?
Electric tools must have a three-wire cord with ground, be grounded, be double insulated, or be powered by a low-voltage isolation transformer.
What is double insulation in electric tools?
Double insulation protects the user and the tools in two ways: normal insulation on the wires and a housing that cannot conduct electricity to the operator in the event of a malfunction.
What is a pillar drill designed for?
A pillar drill is designed to rotate a drill bit and press the sharpened point against the metal to drill a hole.
What are the features of a bench-mounted pillar drill?
Usually belt driven, has a three jaw chuck with a drill shank capacity of 13 mm or less, and spindle speeds range from a few hundred to a few thousand revs per minute.
What are the features of a floor-mounted pillar drill?
Checked for levelness, bolted to the floor, has a three jaw chuck with a drill shank capacity of 65 mm, and offers a wide range of spindle speeds.
What can happen if the drill speed is not correct?
Cutting speed too fast can dull the drill edges rapidly, while cutting speed too slow can break the drill bit.
What factors affect the most efficient drilling speed?
Type and hardness of the material, diameter and material of the drill, depth of the hole, type and condition of the drill press, efficiency of cutting fluid, and accuracy required.
What is the importance of clamping a work piece?
Unclamped or insecurely clamped work pieces can cause inaccurate work, broken drills, and pose a danger to the operator.
What should be done before starting a drilling operation?
Ensure that the part to be drilled is properly clamped to the drill press table.
What is the correct method for drilling a work piece using a pillar drill?
Ensure the work piece is secured, wear PPE, check drill position, switch on the drill, feed the drill slowly, and apply lubrication as needed.
What safety precautions should be taken when using abrasive wheels?
Inspect the wheel for cracks, ensure it fits freely on the spindle, and never stand directly in front of the wheel during start-up.
What should be worn when working on a bench or pedestal grinder?
Always wear appropriate Personal Protective Equipment (PPE).
What is the danger of a shattered abrasive wheel?
A shattered abrasive wheel can harm any person near the grinder and result in serious injuries or death.
What must be secured when operating abrasive wheels on a bench or pedestal grinder?
The guards must be secured in place.
How should a centre punch be held during grinding?
Hold the punch in one hand and position the fingers of the other hand towards the head of the punch.
What angle should the punch be adjusted to when grinding?
The punch should be adjusted to approximately 60° to the face of the wheel.
What should be done to prevent over-heating of the punch during grinding?
Quench the punch frequently.
What is the consequence of transverse grinding on a punch?
Transverse grinding weakens the point.
What is the main advantage of pneumatic tools over electric tools?
Safety.
Why should pneumatic tools be used around flammable materials?
Electric tools can produce sparks that may ignite flammable materials.
What is the typical air supply pressure for pneumatic tools?
90-110 PSI.
What is the purpose of a water drain in a pneumatic compressor?
To remove condensation and water ingress.
What is the most commonly used drill for drilling aircraft sheet metal?
Hand held pneumatic drills.
What is a major advantage of air-driven drills?
Control over speed and adequate torque.
What are pistol grip drills also known as?
Palm or hand drills.
What is the correct angle for holding a drill during operation?
The drill bit should be at 90° to the work piece.
What is the function of an angle drill motor?
To operate in tight or limited-access places.
What are drill collets used for?
To attach drill bits to the drill head.
What type of drill is designed for use in close quarters?
Flat offset drilling head.
What is the purpose of a drill stop?
To regulate hole depth and reduce drill breakage.
What does a drill guide do?
Keeps the drill at 90° to the skin surface.
What is a nut plate drill jig used for?
For accurate drilling of rivet holes and nut plates.
What is the function of a hole finder?
To locate holes in a new skin for alignment with the structure.
What should be done to prevent drill breakage?
Use just enough pressure to allow the drill to cut through the metal.
What is the warning regarding improperly secured work pieces?
Holding a work piece by hand can result in serious injuries.
What is the most common rivet-upsetting tool used in airframe repair work?
The pneumatic rivet gun.
What is the air pressure range for pneumatic rivet guns?
6.5 kg - 7 kg (14.33 lbs - 15.4 lbs) per square cm.
What is the purpose of a pneumatic blind rivet puller?
To insert blind rivets.
What does a rivet shaver do?
Trims the protruding mandrels of rivets.
