Dont let this happen Typical breakage pattern resulting from improper torque 1

Dont let this happen typical breakage pattern

This preview shows page 21 - 30 out of 80 pages.

Don’t let this happen! Typical breakage pattern resulting from improper torque!
Image of page 21

Subscribe to view the full document.

1-800-544-8436 TOOL SETUP FIXTURE A setup fixture and torque wrench are a necessary investment to achieve optimum tool life These are necessary to avoid tool breakage, inferior finish, premature wear and a high tooling cost. After spending over six figures on a CNC machine, this is not the time to pinch pennies.
Image of page 22
1-800-544-8436 DRILL BITS AND ADAPTERS
Image of page 23

Subscribe to view the full document.

1-800-544-8436 USING DRILL BITS ON A CNC Using typical 10mm shank drill bits with a set-screw flat area on the shank in a collet-style tool holder can result in oval holes. The drill bit shank cannot be clamped evenly around its circumference due to the flat on the tool shank present for set screw tightening. The gap that remains between the collet wall and tool shank in the flat area can cause the bit to deflect, possibly wobble and not provide a good finish. The solution is to get a small and inexpensive drill bit adapter that has a 10mm cylindrical shank (without flat) to go into the collet, and the female end of the adapter accepts the 10mm drill shank with flat and is tightened in with a set screw. For CNC use, the 70mm drill bit length should be chosen over the 57mm length. Gap Drill Adapter
Image of page 24
1-800-544-8436 DRILL BIT SELECTION For holes that will go through the material, use V-Point Bits (Thru- Hole Bits) that prevent surface tear-out on the bottom of the cut. For blind holes, a brad point/dowel bit is required. It has a center point and outside spurs to cut a clean hole. For pilot holes, this bit is available in solid carbide in 1/8 diameter For hinge pockets, the hinge boring bit is the best option. The center point and outside spurs provide a clean edge hole and prevent the bit from “walking” .
Image of page 25

Subscribe to view the full document.

1-800-544-8436 CNC DRILL ADAPTER This Universal Drill Adapter is the best and only option if drilling many different cylindrical drill bit sizes for which collets are not always available. RPM and Feed rate: When drilling or boring holes on a CNC machine, your spindle speed and feed rate must be adjusted to within the proper parameters for drill/boring bits. RPM Feedrate(m/min) 3000 1-2 4500 1.5-2.5 6000 2-3.5 9000 2.5-5.5 Recommended Feed / Speed for Drilling on CNC
Image of page 26
1-800-544-8436 SIZING, JOINTING, REBATES, DADO CUTS, AND GROOVING
Image of page 27

Subscribe to view the full document.

1-800-544-8436 The best options for CNC machining are either solid carbide bit or PCD ( polycrystalline diamond). PCD tooling achieves the best return on investment when it is dedicated to cutting homogeneous material and not interchanged between, for instance, composite and wood. Use dedicated tools per material! The only time a carbide-tipped tool is an economical solution for use on a CNC is for cutting a small profiled proto-type (i.e. one-off). 0 200 400 600 800 1000 1200 Carbide Tipped Solid Carbide PCD (Diamond) TOOL LIFE COMPARISON TOOL LIFE COMPARISON STRAIGHT ROUTER BITS TOOL MATERIALS CD
Image of page 28
1-800-544-8436 ROUTER BITS Depending on product and volume being machined, the selection of the most suitable cutting tool requires a bit of homework if best performance and finish relative to investment is desired.
Image of page 29

Subscribe to view the full document.

Image of page 30
  • Fall '19
  • Tools
  • Drill bit, PCD, Cutting, Diamond tool, Diamond Tools

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