Use spiral straight or shear tools for natural woods depending on type of cut

Use spiral straight or shear tools for natural woods

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Use spiral, straight or shear tools for natural woods depending on type of cut required. Use spiral, straight or shear carbide tools for composites, particleboard, plywood or MDF. Use spiral tools when finish and/or available horsepower are problems. The cutting length of the tool is very important to the finish. Use the shortest cutting length allowable, based on the material thickness. Using a tool with a cutting length that is longer than required can cause vibration, deflection and an inferior finish. In general, the cutting length should not be more than four times the cutting diameter. Bits with a cutting length over four times their diameter will be subject to increased breakage. Use the largest tool diameter allowable for increased rigidity, finish and tool life. Solid Tungsten Carbide Router Bits Tungsten carbide cutters are made up of very hard particles of tungsten carbide bound together with metallic cobalt. Bits produced with this material are very strong and durable and tend to stay sharper longer than HSS tools. Carbide-Tipped Router Bits Carbide-tipped tooling provides some of the edge longevity of carbide with the lower cost of a steel base. Carbide tipped bits are only available with straight flutes. High-Speed Steel (HSS) Router Bits HSS is a poured material, chemically and metallurgically bonded together. The steel is processed from raw ore and heated to a liquid stage where several minerals and elements are added to improve the internal structure. Typically, HSS tool life is not as long as carbide. Ceramic and Diamond Coated Router Bits This tooling is worth considering when carbide’s life is not acceptable. The major consideration with these tools is the cost of the coating materials.
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28 Tool Geometry and Material Types Straight Flute Use for wood and plastic operations. The straight flute design, in single or multiple cutting edges, produces a clean finish. The harder the material, the more cutting edges are recommended. The straight flute does not allow for the lifting of material out of the cut. Spiral Flute Use for aluminium, wood and plastic operations. The up-spiral flute is especially good for chip removal. When cutting aluminium and plastic, re-melting of the chips is the primary source of poor cut quality. Use single spiral flute tools for faster feed rates in softer materials. The single-flute cutter typically has lots of room for chips, but the single cutting edge limits either the feed rate or the hardness of the material to be cut. These types of cutters are especially recommended for plastics. Use double or triple spiral flutes for a better finish in harder materials. Double-flute bits provide a smoother cutting action because the chip load is smaller than a single-flute cutter for a given feed.
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  • Fall '19
  • Tools
  • Día, Orders of magnitude, Flute, Tungsten carbide, Collet

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