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Tooling

Tooling bits are commonly considered a supply item, but since they play such an integral part in a CNC router performance, they warrant inclusion in this review and their proper application should not be undervalued. 

It should be noted that quality tool bits that will perform properly in a production environment are not normally found at your local hardware store.  Tool bits found at such outlets can cause a number of problems such as: slowed cutting speeds, poor edge quality, surface scarring and melt back.  Additionally, low quality tool bits generally have a tool life that’s fraction of what a proper bit will offer.

Another factor associated with tool bits is that every material being cut will determine tool geometry, configuration and shape. There are no universal tools that will work properly on every material.  A lack of recognition concerning this fact will produce less than optimum cutting results.

Some tools are intended to plunge directly into the work, however, most are not.  Using a non-plunge bit to plunge into the work will generate substantial axial loads, placing substantial stress on a spindle’s bearings

Cutting tools have a limited life; they become dull with use, and must be changed.  Dull tools not only have a negative effective on cut quality and processing time, they also inherently generate excessive heat which is passed to the system spindle and can contribute to premature failure.

 

Climb Milling vs. Conventional Milling

Climb milling can increase tool life by up to up to 50%. It is growing in use, due to the availability of improved and more rigid machinery, and has been found to be most effective in the vast majority of milling applications. Climb milling is in use when the feed directions and tool rotation direction are the same (Fig. 1).  If they are opposite (Fig. 2) conventional milling is in use.

 

Advantages of Climb Milling

Increased Tool Life - Since chips pile up behind the cutter, tool life can be increased by as much as 50%

Less Costly Fixture Devices - Climb milling exerts a downward force and therefore does not "lift" the workpiece, resulting in easier fixturing.

Improved Surface Finishes - Chips are less likely to be carried by the tooth, reducing marring of the machined surface.

Easier Chip Evacuation - chips fall behind the cutter resulting in faster and easier chip removal.

Lessens or Eliminates Tear-Out in Wood - because the tool is cutting the wood on the entry stroke, which is compressing the wood fibers versus pulling them apart.

Decreased Power Requirements - A higher rake angle can be used on the cutting tool resulting in lower power consumption.

Vendor Stability and Support

Quality CNC Routers have a remarkably long service life.  So, choosing a dependable vendor is an important long-term decision.  The credibility of the vendor, its reputation for quality products, well-funded engineering operations, reliable customer support and financial stability are paramount.

At a time when many technology companies have withered, Techno has demonstrated a history of solid financial growth, a steady increase in its customer base, and a solid and trusted customer support organization.  This combination is a testament to the company’s vision of making high-quality CNC routers available at an extremely competitive price while maintaining an outstanding level of customer service. Steady growth has made it possible for Techno to reinvest in important research and development to continually enhance and add to its product offering.  Enabling customers to satisfy current requirements while providing an ever increasing number of upgrade options.  Techno is a company you can rely on, not only today, but well into the future

Techno is one of nine industrial manufacturing and distribution companies with combined sales over $275 million, owned and operated by Dyson, Dyson and Dunn, Inc.