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OVERARM PIN ROUTER
Setup and Features
Router Bits
Routing System Safety
Special Cautions on Materials & Techniques
Routing System Operations
Edging
Decorative Surface Cuts
Moldings
Mortising
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Duplicating
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Using Drill Press Vise to Hold Workpiece
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Shopsmith Ovararm Pin Router
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Pg. 1-4, Pg 5-8, Pg 9-12, Pg 13-16, Pg 17-20, Pg 21-23

 

Special Cautions and Considerations on Materials and Techniques

Because routers are powerful, high-speed tools with unique performance characteristics, you must pay particular attention to the materials and techniques you are using to avoid mistakes and safety hazards.

  • All hardwoods should be worked in light, multiple passes without pausing or dwelling to avoid burning the workpiece. Open grained hardwoods such as oak and similar species will splinter very easily when you reach the end of a crossgrain cut. For this reason, it's always a good idea to either make very light passes, leave extra stock on the width of the workpiece so the splintered area can be cut away or backup your workpiece with a scrap block at the exit point of the bit. Another good technique to avoid splintering is to make all cross-grain cuts first, then make your cuts with the grain.
  • Softer woods such as lauan, basswood, pine and willow can be worked in slightly heavier passes but "tear" or "fuzz" easily and will require more finish sanding.
  • Highly figured woods such as birdseyes, crotchwoods and burls have an inconsistency of grain that requires cautious, light passes to produce a clean cut.
  • Particleboard and similar composite materials contain high concentrations of glue that can quickly dull high-speed steel bits. Therefore, it is recommended that you always use carbide-tipped or solid carbide bits when working these materials.
  • Plastic laminates are very hard materials that can also dull high-speed steel bits quickly. Again, always use carbide-tipped or solid carbide bits when working laminates.
  • Avoid pressing hard against the bearing pilots on certain bits during cuts. Since they rotate at such high speeds, excessive friction could cause a heat build-up that will destroy the bearings.
  • Again, it's important the stock always be fed into the rotating bit and not with it to avoid kickbacks.

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