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Freud Tips for Correct Use of a Saw Blade Chicago

Tips for a Correct Use of a Saw Blade from Freud and Cutting Tools Chicago aka General Cutting Tools Chicago Illinois.

  • The saw arbor must be in good condition, free of vibrations.
  • The flanges used to secure the blade must be of the same diameter, at least 1/3 of the blade’s diameter (Fig. 1).
  • The machine hub and flange must be parallel to each other. Check tolerances on diameters, sides and concentricity by using a dial indicator (Fig. 2). The total indicated runout should be less than .02mm (.0008″).
  • Inspect the hub of the machine to ensure there are no burrs or debris in or around the mounting area.
  • The spacers must be perfectly parallel (Fig. 2).
  • The spindle must be perfectly straight and with an h7 tolerance (Fig. 3).
  • After continuous use, remove the blade and clean it with the appropriate solvents making sure to get rid of built up resin. For the Perma-SHIELD° synthetic coated blades it’s sufficient to use warm water. In any case, avoid using caustic cleansers as they can break down the carbide.
  • The blades must be sharpened as soon as they become dull,
  • maintaining the original tooth angles. Avoid over-running dull blades to attain maximum sharpenings from the saw blade
  • For sharpening, always use the correct grinding wheels and plenty of cooling liquid.
  • Maximum reboring of the blade is 20 mm of the original bore size.
  • Above this value, the blade will lose its original tuning and overall performance will be affected (Fig. 4).
  • Always keep spacers and flanges clean.
  • When sharpening, the shoulder of the teeth must not be lowered more than needed. This operation must be done with appropriate precision machinery and never by hand. There is the risk of breaking the tip or upsetting the blade balance (Fig. 5-6).
  • For Typical sharpening a good rule of thumb is to remove just enough carbide to pass the worn edge of the carbide. If you can take even amounts of the ultra square tooth designed tooth, this will maximize the overall life of the blade.
  • On ripping machines, the feeding track must be level with the fixed table.
  • Before starting the cut of the material, make sure the blade is correctly locked according to the machine’s specifications.
  • Never scribe, etch or engrave inside the flange or hub area on a saw blade.
  • Adjust saw height to maintain the minimum top clearance projection of the saw blade.
  • Saw blades utilizing a score blade: The scoring blade should be set up to cut .01 mm (.004″) wider than the main blade and no more than 2.Omm (.08″) deep.

Different tooth geometry allows the blade to improve the cutting finish second to the material being worked. These are general rules of thumb:

  • The flat tooth (Fig. 7) is used on multirip saw blades, saw blades for portable machines and universal saw blades.
  • The alternate top bevel (ATB) tooth (Fig. 8) produces a fine cut, and is used on blades for crosscutting wood.
  • The “triple chip” tooth (TCG) (Fig. 9) is used on saw blades for cutting wood composite materials, aluminum and other plastic materials.
  • The “conical tooth/alternate top bevel (ATB)” (Fig. 10) is used on scoring blades for cutting wood composite materials.
  • The tooth’s hook angle is another variable that factors into a saw blade’s applicability for cutting various woods, aluminum or plastics.
  • A tooth’s hook angle ranging from 15° to 25° is suited for cutting soft, hard and exotic wood.
  • A tooth’s hook angle ranging from 5° to 15° is particularly suited for cutting chipboard, MDF, plywood and laminates.
  • A tooth’s hook angle ranging from 0 to 5° is indicated for cutting chipboard panels and non ferrous metals.
  • A tooth’s hook angle ranging from 0 to -10° (negative hook angle) is indicated for cutting aluminum, non ferrous metals, plastics and double sided laminated panels.

For more information contact General Cutting Tools, your authorized Freud distributor shipping to Indiana, Iowa, Wisconsin, Illinois, Michigan, Minnesota and the rest of the US.

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