Tube Notcher that does not use holesaws?

  1. hotponyshoes Member

    Messages:
    572
    Location:
    Somerset. Uk
    Anybody seen a tube notcher that does not only take the standard toothed holesaws?

    They seem to be the weak link in my notcher, especially if trying just to take a partial cut plus the finish is not quite as clean as I would like.

    I know I can get something for a few £k that takes a milling cutter but I was wondering if there was a 'midrange' that I could fit the Armeg Carbide Tipped hole cutter or something like that into?
     
  2. gaz1

    gaz1 Member

    Messages:
    6,840
    Location:
    westyorkshire
    next up is a milling cutter
     
  3. Turbo Member

    Messages:
    2,647
    Location:
    Fermanagh, Northern Ireland
    What about using broach cutters off a mag drill?
     
    addjunkie likes this.
  4. AndersK Member

    Messages:
    501
    Location:
    Sweden
    I recall seeing one using broach cutters.
    Can't remember where but will post if I find it.
     
  5. bigegg

    bigegg I drink and I know things. Its what I do.

    Messages:
    5,295
    Location:
    Leeds, West Yorkshire
    I've seen one that uses a belt grinder? you'd need to get the right size wheels to match the tube diameter, and I'm guessing it's much slower than drilling, but finish can be as perfect as the grit of the belt.
     
  6. wyn

    wyn Member

    Messages:
    2,851
    Location:
    Cardiff
    Do you have any pictures of the setup you are using at the moment?
     
  7. Plasma cutter, have seen a few YouTube vids of home made jobbies
     
  8. chris pruteanu Member

    Messages:
    480
    Location:
    ROMANIA
    Decent broach cutters are dear and they break easily i would rather look at cheaper hole saws...
     
    premmington likes this.
  9. hotponyshoes Member

    Messages:
    572
    Location:
    Somerset. Uk
    I hadn't thought about using a broach cutter.
    I don't 'think' the thread is the same but I will have a look at it!

    Its one of these I am using at the moment,
    Its got a thread on the end for the smaller holesaws then the adaptor goes on for the bigger ones. tube-notcher-2-wns-tn2b-d1.jpg
     
  10. wyn

    wyn Member

    Messages:
    2,851
    Location:
    Cardiff
    I use a similar one. I have replaced the shaft bushes with needle bearings and use constant pitch holesaws.

    I use it a fair bit and tend to cut about 80 notches at a time with no problems.
     
    8ob and chris pruteanu like this.
  11. Richard.

    Richard. Member

    Messages:
    16,972
    Location:
    Cambridgeshire
    I don’t do lots of it but when I do it’s all done using my saw.
    A little more time and thought needed with your cutting angles but no weak point regarding the equipment or the capabilities to what you can notch. Eg material type/thickness/diameter/cope angle.
    Here’s a brief description

    https://www.mig-welding.co.uk/forum/threads/bandsaw-notching.66966/
     
    anto44 likes this.
  12. hotponyshoes Member

    Messages:
    572
    Location:
    Somerset. Uk
    I haven't got a bandsaw and don't really have the room for one!

    I don't do loads so the one I have got is usefull as it stores away then I clamp it in the vice etc when I need it.

    I have got a belt sander in bits and thought of making something from that but a lot of my tube is heavy wall alloy which will clog the belt up.

    I would like to make a proper one someday as I have a mill with rotary table and a big lathe so I could do something to attach to either of those or, ideally, something that attaches to a jigging table to help with setup.
    At the moment the big tools are in a far away workshop so it's something to use until I get around to something proper one day!
     
  13. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

    Messages:
    12,924
    Location:
    East Yorkshire
    I’ve tried rota broach cutters before, they do work, but been very sharp they tend to dig-in. Really need to be power fed.

    Also your setup is not going to help, as its not very rigid.
     
    pressbrake1 likes this.
  14. piman Member

    Messages:
    1,676
    Location:
    Oswestry Shropshire
    Hello Hotponyshoes,

    look for fine tooth hole saws, they will cope better than the standard ones. I got mine online but forget from where.

    Alec
     
  15. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

    Messages:
    12,924
    Location:
    East Yorkshire
    Stakeys sell them, not cheap 3/4 times the price of a std h/saw
     
  16. hotponyshoes Member

    Messages:
    572
    Location:
    Somerset. Uk
    It's not very solid no. I have thought about bracing it up a bit.

    I have only been using standard starret saws in it so it might be worth trying something else!
     
  17. wyn

    wyn Member

    Messages:
    2,851
    Location:
    Cardiff
    You might have the "vari-pitch" type starrett holesaws. They tend to be a bit of a nightmare when notching at angles.

    The "constant pitch" type of holesaw is much better.
     
    premmington likes this.
  18. Brad93

    Brad93 M J B Engineering

    Messages:
    4,700
    Location:
    Essex
    Alibi abrasive notcher. Few grand though.
     
    bigegg and pressbrake1 like this.
  19. citizen kane Member

    Messages:
    135
    UK Hampshire
    If you have a mill why not mount the hole saw in that, this is my setup, seems to work quite well.

    Tube Notcher.jpg Tube Notcher 2.jpg Notched Tubes.jpg
     
    zx9, hunter27, premmington and 2 others like this.
  20. pressbrake1

    pressbrake1 Member

    Messages:
    722
    essex england
    when I endured the misery of making rollcages I used my Bridgeport like ck posted. Id turn a spigot and mount the holesaw to it and weld it as the thread would fail and the mount spigot in a collet.
    Tried broaches but they fail because pitch is too coarse and are expensive.
    Pal has a abrasive belt notcher but he does quantity and has to work stainless
     
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