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Types of saw blades

Types of saw blades . Crosscut used to make smooth cuts across the grain Rip used to make smooth fast cuts with the grain Combination used to make fast cuts with or across the grain Carbide tipped more expensive but have a longer life. Dado head used for make selected dado cuts.

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Types of saw blades

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  1. Types of saw blades • Crosscut • used to make smooth cuts across the grain • Rip • used to make smooth fast cuts with the grain • Combination • used to make fast cuts with or across the grain • Carbide tipped • more expensive but have a longer life

  2. Dado head • used for make selected dado cuts

  3. Other saw blades • Hacksaw • is selected by length, gauge, set of teeth, teeth per inch, and metal hardness. • Band saw • similar to hacksaw blade, except it is a continuous blade • Both of these types should be selected to to allow three teeth to be in contact with the surface being cut.

  4. Sabre saw blades • Three types • 1.knife • for cutting leather • 2.metal cutting • have 16 to 32 teeth per inch • 3.wood cutting • have 6 to 12 teeth per inch

  5. Portable circular saw • Parts • trigger switch • guard lift handle • anti-kickback clutch • retractable guard • blade • handle • power cord • angle scale • tilt lock knob • tilt base

  6. Uses of the portable circular saw • replaces the handsaw in most cases • takes the place of the bench or table saw • use in same or different location on any particular job • used for ripping, crosscutting, dodoing, grooving,angle cuts,bevels and mitres. • Considered one of the most important labor saving pieces of equipment in the shop • WHY?

  7. Procedure for using the circular saw • select a sharp blade of the correct type • properly adjust the saw and be sure all thumbscrews are tight • blade should be installed so that the teeth turn up toward the saw base • teeth should extend below the thickness of the material to be cut to a distance equal to the depth of the teeth • secure material to be cut

  8. start saw before blade touches the work • saw only in a forward direction • must be guided along a straight line • both hands should be used if possible • at the end of the cut release the trigger switch and allow the blade to follow through as the saw is lifted away from work

  9. Sabre Saw

  10. on-off switch guide knob blade screw toe blade tilting base base tilt adjustment handle power cord strain reliever Parts of the Sabre saw

  11. Uses of the sabre saw • referred to as electric jigsaws or bayonet saws • make a reciprocating motion or orbital or oval motion • allows the cut to be made on the upward stroke and the release of the chips on the downward stroke • stroke of blade is about 1 inch • saw cut varies from about 3200 to 4200 strokes per minute

  12. motor sizes vary from about 1/6 to 1/2 HP • considered to be very versatile • can cut wood, sheet metal, plastics, fiberglass, rods, tubing, rubber, masonite, leather, and other materials • to use this for different types of materials, the blade has to be the right type

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