Tools and Fasteners and Their Uses
Tools
Definition of a tool: “A muscle-powered device that solves a problem by providing a mechanical advantage in order to do useful work.”
Examples of tools include hammer, screwdriver, tape measure, drill, saw, and wrenches.
Fasteners
Definition of Fasteners: “Devices used to join or assemble parts together.”
Examples of fasteners include nails, screws, nuts and bolts, hooks, and pins.
Hammer
Hammers are used as levers. They can bang in nails with the head end or remove nails using the claw end. http://www.enchantedlearning.com/physics/machines/Levers.shtml
Screwdrivers
Basic Screwdriver
It is also called flat blade or flathead screwdriver.
Phillips Head Screwdriver
Pliers are used to grip things.
“Use adjustable pliers to tighten or loosen nuts and bolts, pinch snap-rings, and other jobs that require a good grip.”
Drill
Some drills are electric and some are hand drills. Drills bore holes into material such as wood or metal.
Wrenches
Adjustable wrench Combination (open and box) wrench
Wrenches are used to tighten or loosen bolts and nuts.
“Righty Tighty, Lefty Loosey”
• To tighten, you turn to the right (clockwise) • To loosen, you turn to the left
(counterclockwise)
Measuring Tools
Rulers (12 inches) measure short distances
Tape measures are used to measure long distances like the length of a driveway.
Yardsticks(36 inches or 3 feet) measure large things like the length of a room.
Fasteners- Nails
• Common fastener for wood
• A fast and strong method for joining wood.
• Used in building houses
Fastener- Screws • Slotted screws and
crosshead screws • Put into material with a
screwdriver that matches the screw head
• Screws pull together things to be joined
• Screws can be screwed into wood, metal, or plastic
• Stronger connection than nails
Fasteners- Nuts and Bolts • Holes must be drilled
first in each item • Bolt is passed
through both holes • Nut is then threaded
onto bolt and tightened
• A wrench tightens everything.
• Strongest connection
With some bolts you may need a screwdriver to tighten them. Look at the head of each bolt.
Name the screwdriver used to tighten each bolt head.
Quiz: Tools and Fasteners
1.True or False • A. A pair of scissors would be considered a tool. • B. Glue is a tool. • C. A knife is a tool. • D. A Phillips head screwdriver will work with a
slotted screw. • E. Saws are used to cut wood. • F. You may need a screwdriver and a wrench to
tighten a nut and bolt.
8. You are building a house in an area where there are lots of hurricanes. You can use nails
or screws to build the wood sections of the outside of the
house. Which is a better choice and why?