Results 1 to 9 of 9

Thread: What the heck!

  1. #1
    Join Date
    Dec 2006
    Location
    Oliver Springs, TN
    Posts
    1,726

    What the heck!

    On the router table I was cutting a few rabbets 3/8 x 3/8. First two went fine. next one not so well! I started the cut and got about 1 1/2" in and BANG! the board goes flying. After checking to see if I was leaking any red juice and changing my pants. I started thinking what the heck! I then started looking for what caused it to happen. I had noticed after the board went flying the router was making an odd noise. I checked the bit and this is what I found. Click image for larger version. 

Name:	rabbit bit face.jpg 
Views:	49 
Size:	49.1 KB 
ID:	94498Click image for larger version. 

Name:	rabbit bit.jpg 
Views:	43 
Size:	31.8 KB 
ID:	94499

    I'm just glad the carbide was captured in the wood and I didn't take a shot!

    What do you think happened?

  2. #2
    Join Date
    Jan 2015
    Location
    Spring Hill Kansas
    Posts
    16
    One or two things that come to mind here.
    1. Bit has been dropped at one or more times in its life
    2. Manufacturing process wasn't great.
    3. Router speed was to great for this bit.....

  3. #3
    Join Date
    Mar 2007
    Location
    Escondido, CA
    Posts
    5,167
    Carbide is brittle. If you didn't hit something really hard, then I'd suspect the carbide to be defective. Stuff happens. Good when you are only the spectator. Much hairier when you are a participant.
    ++++++

    Some say the land of milk and honey; others say the land of fruits and nuts. All together my sort of heaven.

    Power is not taken. It is given. Who have you given yours to? Hmmmm?

    Carol Reed

  4. #4
    Join Date
    Jun 2008
    Location
    GTA Ontario Canada
    Posts
    12,247
    Wow lucky break John. Glad u found no red sauce on yourself.
    What make of bit is it.?

    Sent from my SGH-I337M using Tapatalk
    cheers

  5. #5
    Join Date
    Dec 2006
    Location
    Oliver Springs, TN
    Posts
    1,726
    Never been dropped. It's a whiteside Rob.

  6. #6
    Join Date
    Jul 2011
    Location
    The Gorge Area, Oregon
    Posts
    4,698
    Quote Originally Posted by Carol Reed View Post
    Carbide is brittle. If you didn't hit something really hard, then I'd suspect the carbide to be defective. Stuff happens. Good when you are only the spectator. Much hairier when you are a participant.
    That ^^^^

    and glad you didn't get bit!

  7. #7
    Join Date
    Aug 2007
    Location
    Reno NV
    Posts
    13,356
    Whoa, Looks like the entire carbide came free of the bit? Zoiks!
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


  8. #8
    Join Date
    Feb 2008
    Location
    East Freeetown, Massachusetts
    Posts
    3,017
    Looking at the bit I can make some assumptions

    1) The braze did not fail
    2) There is a clean break of the carbide
    3) There is a thick strong piece of carbide that broke

    From what I can see I would not blame it on cutter failure.

    With that said I would look then at setup.

    If the wood cocked in the cut is would grab the carbide and pull it really hard and really fast into a cut too deep for the cutter to handle and snap off the carbide. Hence, it is jammed into the wood. It could have been a quick jerky movement of shaking that pulled the wood in.

    If there are sufficient mechanical hold downs for the piece (feather boards) then I might question climb vs conventional cutting. I might also question RPM or feedrate.

    I wonder - were you trying to take full depth cuts and hand holding?

    But - my guess is in the setup somewhere.

  9. #9
    Join Date
    Apr 2007
    Location
    No, not all of SoCal is Los Angeles!
    Posts
    9,076
    I see two good things here; one for sure and one probable. First, no injury . Second, I had a keyhole bit fail very unceremoniously. I offered to ship it to white side just so they could check to see what happened. They unceremoniously sent me a new bit ;-) I have their rabbet set and have used it to the point where it went in for sharpening; still going strong (?).
    Last edited by glenn bradley; 02-02-2016 at 05:29 AM.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

Similar Threads

  1. Scared the heck out of me
    By Bob Gibson in forum Safety Tips
    Replies: 10
    Last Post: 07-10-2016, 05:44 PM
  2. What the heck is that?
    By Brent Dowell in forum Off Topic Discussion
    Replies: 8
    Last Post: 11-02-2014, 12:49 PM
  3. So, where the heck has Rennie been?
    By Rennie Heuer in forum Off Topic Discussion
    Replies: 18
    Last Post: 11-30-2009, 03:03 PM
  4. The heck with the tiller, this is what I need
    By Robert Mickley in forum Off Topic Discussion
    Replies: 4
    Last Post: 05-04-2009, 03:20 AM
  5. What the Heck Happened Here?
    By Vaughn McMillan in forum Site Questions and Test Posts
    Replies: 13
    Last Post: 12-08-2006, 03:13 AM

Bookmarks

Posting Permissions

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