Use and care Ch5

Bench grinder

Commonly used for sharpening cutting tools.

Concrete saw may be _________ or ___________.

Handheld / self-propelled

Grounded outlet

Has a ground wire that is connected to a metal water pipe that extends underground without converting to plastic or a ground rod driven into the earth. Double insulated tools do not require a grounding system for safe operation.

Vane compressor

Has multiples bañes located in an offset rotors. As the rotor rotated, the offset position allows the vanes to slide out and draw air from the inlet port. As the rotor continues to rotate, the volume between the vanes decreases, pushing the vanes into the their slots in the rotor.

The chuck

Is a device with adjustable jaws that is used to hold the bit. The two types of chucks are keyed and keyless.

Carbide-tipped masonry drill bit

Is a drill bit that has a carbide cutting tip used to bore holes in concrete, plaster, slate, stone, brick, and other types of masonry.

Spade drill bit

Is a drill bit that has flat cutting lips at the outside edges and a central projecting point used to guide the bit into wood, plastic, or composition materials.

Anger drill bit

Is a drill bit used to bore deep holes in wood up to 1" in diameter. Bits with screw points are used most often for wood framed structures.

Hammer drill

Is a drill that moves a bit in a rotating and reciprocating motion to boar small diameter holes in hard surface. It bores holes in hard surface such as masonry and concrete.

Air grinder

Is a grinder that uses a small air motor for power. They are smaller and more powerful than electric models and are commonly used for more precise grinding operation.

Angle grinder

Is a handheld grinder with the cutting wheel turned 90 degrees to the motor. They are used to sand, grind, and cut various materials such as concrete and metal. They may be powered by electricity or compressed air.

Circular saw

Is a handheld or table mounted power saw with teeth around the circumference of a circular blade that is rotated at high speed on a central axis or shaft.

Portable band saw

Is a handheld power saw that has a flexible metal saw blade forming a continuous loop around two parallel pulleys.

Gullet

Is a low area between the teeth of a saw blade.

Reciprocating saw

Is a multipurpose saw in which the blade quickly moves back and forth to create a cutting action.

Core drill

Is a piece of drilling equipment that consists of a drill head, mast, and base and is used to cut holes up to 14" in diameter in concrete, concrete block, and stone.

Chain saw

Is a power saw that is used to cut heavy timbers and is useful on demolition projects. They are electrically or gasoline powered.

Cutout saw

Is a power saw that uses 1/8" or 1/4" bit to cut through wood and non-wood materials up to 1" tick

Abrasive saw

Is a power saw that uses a high-speed abrasive wheel to cut metals such as ductile cast iron pipe.

Jigaaw

Is a power saw used to cut curved lines, circles, and rectangular openings in thin materials.

Concrete saw

Is a power saw with an abrasive or diamond rotating blade that is used to score and cut concrete.

Air ratchets

Is a ratchet powered by air similar to a hand powered socket wrench. They are design for speed of operation rather than a torque.

Drill bit

Is a rotary-end cutting tools that fits into the jaws of a power drill. It has two or more cutting edges and two or more spiral or straight flutes used for the removal of chips and the admission of cutting fluid.

Hole saw

Is a rotating saw blade with a mandrel mounted in the center that is used to cut larger holes than can be cut with drill bits.

Drywall screwdriver

Is a screwdriver that is specifically designed for fastening gypsum board to wall studs and ceiling joists and, in the pipe trades, is used to mount backing materials during fixture or equipment roughing-in.

Flute

Is a spiral groove that runs along the length of a drill bit.

Bench grinder

Is a stationary grinder mounted on a table or stand with two rotating stone wheels, one mounted at each end of the motor.

Grinders

Is a stationary or handheld power tool used for quickly removing thin layers of material and/or improving surface finish.

Miter saw

Is a stationary power saw attached to a pivoting framed that allows positioning of the saw at various angles. It's primarily used for cutting 90 degree angles.

Band saw

Is a stationary power saw that has a flexible saw blade forming a continuous loop around two parallel wheels.

Extensión cords

Is a temporary wiring used to supply power to portable electric tools and equipment.

Voltage indicator

Is a test instrument that indicates the present of voltage when the test tip touches, or is near, an energized hot conductor or energized metal part.

Receptacle testers

Is a test instrument that is plugged into a standard receptacle to determine if the receptacle is properly wired, energized and grounded.

Test Light

Is a test instrument with a bulb that is connected to two test leads to give a visual indication when voltage is present in a receptacle. Neon test light is the most common.

Pressure regulator

Is a valve that restricts and/or block downstream airflow.

Rotary hammer

Is an electronic tool with a drill bit that is rotated and moved with a percussive action to bore into hard material such as concrete or masonry. Used to drill holes larger than 5/8" diameter.

Pneumatic impact wrench

Is an impact wrench that uses compressed air as a power source. It is similar in operation to a battery or electric powered impact wrench. They are designed for high torque applications and require minimal force from the operator.

Pressure gauge

Is an instrument used to measure the pressure inside the receiver tank

Stationary ( abrasive saw)

Is attached to a small table that pivots at rear. The saw is lower into the workpiece.

Right-Angle drills

Is corded or cordless drill with the chuck turned 90 to the drill motor.

Self-feed dril bit

Is drill bit with cutting edges on the bottom and side and a center feed screw that pilots the bit and pulls it through the wood.

Core bit

Is hallow bit with industrial diamond teeth embedded in the cutting edge.

Two types of circular saws are ___________ and ______________ saws.

Side drive / worm drive

Two factors that affect the drilling rate of a hammer drill are _______ and __________.

Speed / pressure

Twist drill bit

The most frequently used drill bit for drilling small holes. Is a general-purpose drill bit used to drill holes up to 1" in diameter in wood or light-gauge metal.

Pistón compressor

Uses reciprocating pistón to compress air. May be single stage or multistage.

Band saw are available in both ________ and _________ models and in a wide range of sizes

Vertical / horizontal

Many saws use ________ to reduce the amount of dust and debris created and to cool the blade.

Water

The ________ the wire diameter of an extension cord, the smaller the AWG number. The longer the extension cord, the _______ the current-carrying capacity of the cord. As the distance from the electric supply increases, a ________ gauge extension cord must be used.

1. Larger 2. Lower 3. Heavier

Most portables band saw have ______ speeds. The _______ speed is used when cutting hard materials, and the ________ speed is used when cutting soft materials.

2 Lower Higher

In order to be grounded, a power tool must have ______ conductors cord with a _________ plug that fits into a grounded outlet

3 3 prong

Pneumatic nailer and staplers

Are air powered fastening tools mainly used in framing and finishing work.

Portable power drills

Are either corded ( AC power), cordless (battery-operated), or pneumatic (air-powered) and are available in D-handle or pistol-grip handle design.

Cordless drill

Are most effective for low-torque operation such as drilling thinner wood and driving narrower screw.

Power saw

Are primarily used to cut wood, but they can also be used to cut plastic and metal.

Pneumatic tools

Are tools that are powered or operated by compressed air. They are commonly used in prefabrication shops and include impact wrenches, air ratchets, air grinders, jackhammers, and pneumatic nailers and staplers.

Power screwdriver

Are used for rapid and efficient driving or removal of screws. Is screwdriver with an adjustable clutch mechanism or an adjustable depth control to prevent the over tightening and stripping of screws.

The parts of an air compressor are the

Compressor, receiver tank, pressure gauge, pressure switch, filter, and lubricator

Screw compressor

Contains meshing, screw like rotors that compress air as they turn. The screws draw air in at one end of a close fitting chamber, and the air is forced along the rotors and compressed as the rotors spin.

Heavy duty rotary hammer

Drill holes in concrete up to 1 1/8" diameter with solid drill bits and holes up to 4" diameter with core drill bits.

Variable-Speed drill motors

Drill speed is controlled by pressure on the trigger switch of a variable-speed drill. Slow drill speed are more effective with harder materials such as steel. Faster drill speeds work better with softer materials such as wood.

impact wrench

Is a corded or cordless wrench used to supply short, rapid impulses to sockets. Are used for a variety of applications, including installing and removing nuts and bolts and driving large bolts.

impact driver

Is a cordless power screwdriver that uses both rotational force and a hammer mechanism to drive fasteners.

Filter

Is a device containing a porous substance through which a fluid or air can pass but particulate matter cannot.

Lubricator

Is a device that injects atomized oil into the air sent to pneumatic components.

Safety relief valve

Is a device that prevents excessive pressure from building up by venting air to the atmosphere.

Pressure switch

Is a device that senses a heigh or low pressure condition and relays and electrical signal to turn the compressor motor on or off.

Air compressors

Is a device that takes air from the atmosphere, compresses it, and then stores it to power pneumatic tools.

Power tool

Is hand tool that uses externally supplied power from an electrical outlet, battery, or pneumatics. Power tools with cords typically use 115VAC power. Portable battery-powered tools are convenient and are used in locations where electrical outlets are not available. Pneumatic tools are powered by compressed air or compressed carbon dioxide (CO2)

Jackhammer

Is pneumatic tool that uses interchangeable cutting bits to penetrate hard surface such as rock, asphalt, and concrete. Use an internal hammer that is driven up and down to stoke the cutting bit. To be effective, downward force has to be applied to the tool.

No-hub driver

Is power drill that is designed to quickly tighten no-hub coupling with accuracy and repeatability.

Handheld (abrasive saw)

Is useful when the work cannot be brought to the saw.

Direct Current (DC) voltage

Is voltage in a circuit that has current that flows in one direction only.

Alternating Current (AC) voltage

Is voltage in a circuit that has current that reverses it's direction of flow at regular intervals.

Circular saw blade

Many types of blades are used with circular saws. The blade used depends on the material being cut and the grain direction in which the cut is being made.

The two difference between the side drive saw and the worm drive saw is the _____________.

Motor position

The three main types of compressors are

Pistón, screw, and vane

______________ are becoming more popular because they require less maintenance and introduce less oil into the system than do other compressor

Screw compressor

The three major parts of a drill bit are the _______, the ______, and the _________.

point/ body/ shank