what type of bit for drilling with my cnc

Results 1 to 8 of 8

Thread: what type of bit for drilling with my cnc

  1. #1
    Member thisthat's Avatar
    Join Date
    Mar 2020
    Posts
    20
    Downloads
    0
    Uploads
    0

    Default what type of bit for drilling with my cnc

    So I am aware that you are not supposed to drill straight down with a flat end mill, so if i did want to run drilling operations on my cnc can I simply put a regular 1/4" drill bit in my machine? (by regular I mean the classic drill bit I would normally use in my handheld drill).

    I would be machining almost strictly wood, sometimes hard wood, for this specifically though it is an mdf panel.



  2. #2
    Member ger21's Avatar
    Join Date
    Mar 2003
    Location
    Shelby Township
    Posts
    35538
    Downloads
    1
    Uploads
    0

    Default Re: what type of bit for drilling with my cnc

    I use short length drill bits 1/4" and smaller. For larger holes, use an endmill with a spiral ramp.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  3. #3
    Member thisthat's Avatar
    Join Date
    Mar 2020
    Posts
    20
    Downloads
    0
    Uploads
    0

    Default Re: what type of bit for drilling with my cnc

    ok great thank you!



  4. #4
    Member
    Join Date
    May 2016
    Location
    United States
    Posts
    471
    Downloads
    0
    Uploads
    0

    Default Re: what type of bit for drilling with my cnc

    Any bit you would consider putting into your hand drill to put a hole in wood you can use in your CNC machine. Even well past 1/4". I wouldn't recommend using a basic hole saw though. No chip room.

    For metals, some basic rules are bright finish for aluminum and Black Oxide for steel. Cobalt for alloy steels and stainless. TIN coating is a basic and low cost improvement you can add to most of those. 118 deg or 135 deg tip. Your choice. Won't much matter in many basic situations. 135 deg ,is more prone to lifting on breakout in thin work.



  5. #5
    Member CitizenOfDreams's Avatar
    Join Date
    Nov 2012
    Location
    USA
    Posts
    1267
    Downloads
    4
    Uploads
    0

    Default Re: what type of bit for drilling with my cnc

    In some situations it could also be advantageous to make holes using end mills and helical interpolation.
    - You can make holes of different sizes without changing the tool.
    - You can "fine tune" the hole diameter if needed.
    - You can make blind holes with a nice flat bottom.
    - You can use a high RPM spindle (unsuitable for a large diameter drill bit).



  6. #6
    Member
    Join Date
    May 2016
    Location
    United States
    Posts
    471
    Downloads
    0
    Uploads
    0

    Default Re: what type of bit for drilling with my cnc

    It's hard to know what the OP means by CNC machine. Could be anything. If an actual machine tool like a 40 taper VMC, any of the suggestions so far are do-able, but if the OP is running a router type screaming high speed spindle thing, then forget my whole first paragraph posted earlier, and stick with C Of D's and ger21's ideas.

    I will say a drill is about the best roughing tool out there, but the further you get past 1/2", the fewer sizes people tend to have, especially those just stating out. That's when the helical boring can save you money and trips to the tool store.

    How fast do those dang router spindles go anyway? On average...
    Do they tend to be fixed speed or variable with poor torque at low speed? I know nothing about them.



  7. #7
    Member ger21's Avatar
    Join Date
    Mar 2003
    Location
    Shelby Township
    Posts
    35538
    Downloads
    1
    Uploads
    0

    Default Re: what type of bit for drilling with my cnc

    Yes, they have poor torque at low speeds, so larger bits may stall the spindle.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  8. #8
    Member routalot's Avatar
    Join Date
    Dec 2003
    Posts
    1206
    Downloads
    0
    Uploads
    0

    Default Re: what type of bit for drilling with my cnc

    If you use a conventional drill bit just be aware of the tip geometry.You need to program to create the hole that you need after taking into account the tip angle so that the correct tip or shoulder depth is achieved.A lip and spur bit may need to have the distance from the tip to the end of the helical section taken into account and in the event of through drilling the spoilboard may gain a bit of decoration.Helical interpolation works very well and shouldn't do more than lightly brush the spoilboard.

    For the benefit of the-gentlegiant-one machine I know of has a machine with a spindle capable of 24,000 rpm although it doesn't have too much torque below 8,000.



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

what type of bit for drilling with my cnc

what type of bit for drilling with my cnc