There are other factors that can affect your results These factors are defined

There are other factors that can affect your results

This preview shows page 5 - 6 out of 10 pages.

a good starting point when cutting non-ferrous metals. There are other factors that can affect your results. These factors are defined below as they relate to the cutter. Type of End Mill There are a staggering number of bit manufacturers and designs on the market. Out there somewhere is likely the best bit but the probability of finding it is just about nil. In addition, the best bit for one type, despite all these complications, it is imperative that the proper bits are found and used. We have found that many bits will often not work at all and others can make a job simple. Bit Material Composition Bits can be made of various grades of steel, various grades of carbide, various types of ceramics, and gemstones. For most practical purposes carbide bits are what most Router tables use. Steel bits wear out too fast and the ceramic and gem stone bits cost too much. Even within the carbide category of bits the material will vary in strength and hardness. The stronger the material is, the less likely it is to break. The harder the material the longer the bit will wear. Unfortunately in carbide bits these two features cannot be found in a single bit….strong bits will not break easily but will get dull quickly, hard ones stay sharp but tend to break quickly. Number of Flutes The flutes are the bits cutting edges. It is possible to purchase bits with between 1 and 4 flutes. The number of flutes that you choose depends on the application and cuter design. It will also affect how well the chips are evacuated from the cut. The more flutes used, will reduce the space between flutes thus reducing the tools ability to expel the chips. Cutting Length This is the cutting length of the end mill. Generally a shorter cutting length is better as they are less likely to break. As a rule, use bits whose cutting lengths are no longer than 3 times the diameter. When using small diameters it is sometimes advisable to go to a ''stub'' length bit, which has flute lengths only 2 times the diameter of the bit. Cutting Diameter This is the cutting diameter of the end mill. Always use the largest diameter allowable. Cutter Failure Heat is one of the main causes of cutter edge failure. It is present in all milling operations and is caused by the friction of the cutter and the material coming into contact. Heat cannot be eliminated totally but by using the correct and sharp cutting tools, proper feeds, and speeds for the material being machined. And proper application of coolant it can be minimized. Friction and heat are interrelated so when dealing with friction you would apply the criteria as heat. Chipping or crumbling of cutter edges occur when cutting forces impose a greater load on cutting edges that their strength can withstand, small fractures occur and small areas of the cutting edges chip out.
Image of page 5

Subscribe to view the full document.

Image of page 6
  • Fall '19
  • Tools
  • Milling cutter, High speed steel, Cutting, Collet, Downcut Spiral

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes