CIRCULAR SAWS

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CIRCULAR SAWS

• Table Saw
• Jeremy Ledford

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The Table Saw

• The arbor is the shaft on which the blade is
  mounted.
• Table saws may be left or right arbor.
• Parts of the saw
• Splitter
• Handwheels
• Miter gauge

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Guards

• Saw guards are NOT foolproof and their use will
  NOT completely eliminate the hazards of the table
  saw operation!!
• Guard with and without splitters.

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Saw Blades

• Common Types of Blades
• Rip, Crosscut, Rough Cut, Combination
• Rip Blade teeth are filed straight across to
  form chisel shapes.
• Crosscut Blade teeth are filed to a point.
• The NUMBER OF TEETH determines the coarseness of
  the cut and the rate of feed.
• More teeth need to be feed slowly. WHY?

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Carbide-Tipped

• Strong tip is added to the blade.
• Lasts longer than conventional blades.
• We use a Combination Carbide-tipped blade.

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Safety Rules

• Check the blade
• Use the guard for all operations whenever
  possible.
• Set the blade above the wood 1/4? 1/8?
• Tip of carbide blade
• Stand to one side of the saw when cutting

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Safety Rules

• NEVER CUT STOCK FREE HAND!
• Turn off the saw before making any adjustments.
• Book states Use a push stick to move scrap
  cuttings away from the blade.
• Turn off the saw, let it stop, then use a push
  stick to remove the pieces.

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Safety Rules

• When catching stock, only support it, do not push
  or pull the stock.
• Clear the saw table and place waste cuttings in
  the scrap box.
• Flying miter cut?

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Ripping Stock

• Ripping is cutting with the grain.
• Have at least one straight edge to run along the
  fence.
• NEVER reach over or around the saw to catch
  short pieces.
• Use an auxiliary fence when ripping thin strips
  or veneers to prevent the stock from slipping
  under the fence.

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Crosscutting

• Crosscutting is cutting across the grain.
• Move the fence out of the way.
• Never use the miter gauge and the fence at the
  same time, unless you are using an auxiliary
  fence.

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Crosscutting

• To cut small pieces with a miter gauge, clamp the
  stock to a larger piece as shown.

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Dado Head

• The fence can be used with the miter gauge in
  this situation.
• Stacked Dado Head
• Wobble Blade.

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Sliding Tables

• Great for large piece, i.e. plywood sheets
• Tru32 Cabinetmaking

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Sharpening Blades

• Certain equipment is needed to completely sharpen
  circular saw blades, however, they can be filed a
  number of times before they must be fully
  re-sharpened.
• Page 234 in your text.

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Sharpening Blades

• Jointing rounding the blade so all the teeth
  are the same height.
• Clamp an abrasive stone to the miter gauge.
• Raise the blade till it touches.

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Filing saw teeth

• Mount the blade in a filing clamp.
• File teeth
• Rip blades straight across
• Combination teeth 15 degrees

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Setting Teeth

• Blades must be set after a number of sharpenings.
• Setting the blades keeps a saw kerf.

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Gumming

• Gumming is the process of grinding and shaping
  the saw gullets.

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Dado Heads

• The same process is used, but the entire assembly
  must be mounted and sharpened.

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CIRCULAR SAWS

• Radial Arm Saw

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Radial Arm Saw

• An advantage of the radial arm saw is that the
  board is held against the fence while the saw
  moves across the board.
• This prevents kickbacks and reduces stock
  slippage.

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Safety Rules

• Support the ends of long boards.
• Always return the saw to the rear of the table
  after making a cut.
• Keep a margin of safety, 6in

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Crosscutting

• Control the feed rate
• If the feed rate is not controlled properly, the
  saw will advance too rapidly and climb over the
  work.
• Miters, bevels, and compound miters can be made
  on this machine.

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Ripping

• Ripping can also be performed on this saw.
• Make sure to feed the stock into the blade.
• Dados and grooves.

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CIRCULAR SAWS

• Portable Circular Saw

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Parts of the Saw
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Portable Circular Saw

• Used extensively by carpenters in framing and
  construction.
• Can be used in the lab for cutting rough sizes.
• Size is determined by the diameter of the largest
  blade it will carry.

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Safety Tips

• Support the stock so the kerf will not close.
• Clamp small pieces in a vise.
• Adjust the depth of the cut according to the
  thickness of the stock, 1/8 deeper.
• Do not lay the saw down until it stops moving.
• DO NOT TRUST THE BLADE GUARD!
• Dont create bad habits, co-worker story.

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CIRCULAR SAWS

• Miter Saw or Chop Saw

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Miter Saw

• Text Power Miter Box Saw
• Good for cutting miters on trim and molding.

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Compound Miter Saw Frame and Trim Saw

• Saw pivots right or left up to 60 degrees
• Supported on a pair of overhead shafts or guides