Tools in the Classroom
Tools that we will be using in the classroom (from TechnologyStudent.com)
- to Make the Compressed Air Vehicles
- to Create the PVC Pipe Flutes
Other Important Lab Tools
Tool Identification http://www.hand-tools-manufacturers.com/
A ripsaw has large, chisel shaped teeth, usually -½ teeth per inch, and is made to cut with the wood grain. Blade length differs from 24" to 28". Teeth are cross-filed to assure that the chisel point is set square to the direction of cutting, for best performance.
This saw is best held at 60° angle to the surface of the board being cut. The ripping action of the saw produces a coarse, ragged cut which makes the saw unsatisfactory for finish work.Most commonly used crosscut saws are 10 to 12 point for fine work and 7 or 8 point for faster cutting. Ten teeth per inch is considered general purpose, 12-point being used for cabinet work. Teeth are shaped like knife points to crumble out wood between cuts.
Best cutting angle for this saw is about 45°. Blade lengths range from 20" to 28", 26" is most popular.
Coping saws cut irregular shapes and intricate patterns. They consist of a saw blade and steel tension frame. The blade is removable. Blade sizes range from the rotary or wire type to 1/8" wide.
Hacksaws are fine-toothed saws designed to cut metal. The saws consist of a blade held in a steel frame with relatively high tension.
Hacksaw. Some things, like metal things, are too hard for a regular saw or a knife. But they still need to be cut.
A chisel is a metal tool with a sharp beveled edge, used to cut and shape stone, wood, or metal.
Clamp - Jorgensen Wood ScrewA hand-screw clamp is two hardwood clamping jaws adjusted to the work by two steel screw spindles assembled into the jaws.
A file is a hardened steel tool with cutting ridges for forming, smoothing, or reducing, especially metallic surfaces. Files are classified by their length, type and shape. Quality is determined by lasting performance and cutting ability. Length is measured from the point i.e., the square end of file to the shoulder, where the blade sets onto the tang. Length indicates coarseness, stroke distance and rate of stock removal.
Used to draw nails, these hammers may have handles made of a number of materials-wood, jacketed fiberglass, jacketed graphite, tubular steel or jacketed steel I-beam. Each offers a different combination of stiffness for efficiently delivering the force of the blow to the target, and shock absorption to reduce shock and stress on the user's hand, wrist and arm. Wood, which flexes, offers some degree of shock absorption. Stiffer materials, such as graphite or steel I-beam deliver the full force of the blow but require cushioning in the jacketing and grip to provide long-term user comfort.
Hammer. Nails are the most basic way we put things like boards together, and you can't drive a nail without a hammer. Unless you grew up milking cows and have forearms like Popeye, get one that's not too heavy, so you can swing it easily more than a time or two.
A square is a T-shaped or L-shaped instrument, used for checking and marking right angles. Squares may also have tables or scales, the most common being rafter and Ease tables. These provide information on how much lumber will be needed on a job, as well as information for roof framing. Clarity and legibility of graduations is a key factor in choosing any type of square. Modern techniques enable manufacturers to etch graduations into the blade and create high-visibility markings that are durable as well.
Squares are classified as follows:
Steel Squares : A steel square is made from one piece of steel, with the long end or body usually 24" and the short end or the tongue of 16". Similar squares are available in other sizes (9" x 12") and other materials (aluminum).
Try Square : A try square is used as a guide for pencil markings of cuts and to check the edges and ends of boards to see if they are square. It is also used to determine whether a board is the same depth for its entire length. Try squares have wood, plastic or metal handles.
Combination Squares : Combination square usually measures 45 degree angles. If it has a degree scale, it can determine any angle. A combination square combines the best features of the steel and try squares. It has a grooved blade and head that can be adjusted to many locations on the 12" blade to provide different measurements.
A Tape rule is a concave, spring-steel blade ranging from 1/4" to 1" wide and from 3' to 33' long, coiled inside a carrying case. Metric tape rules come in comparable widths and lengths up to 10 meters. Because the tape rule is flexible, it provides an easy means for accurately measuring curved surfaces. The concave cross section allows it to be extended unsupported. Contained in the housing of some models are spring mechanisms that release or retract the tape. Tape measure. Before you can cut, it's important to figure out where to cut. You can eyeball it, also known as guessing, or you can waste a lot less wood (or whatever) and measure.