Can anular cutters drill 304 stainless?
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  1. #1
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    Can anular cutters drill 304 stainless?

    ??

    I have to price out drilling 1/2" holes in 3/4" thick 304 stainless, any body know if the anular cutters that the mag drills use will work?



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  2. #2
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    Re: Can anular cutters drill 304 stainless?

    WHEW..... get on the phone with tech at Hougen

  3. #3
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    Re: Can anular cutters drill 304 stainless?


    MetalMan23


    S/S is paradoxically hard and gummy - and will work harden in
    a instant.

    Drilling is not a issue: so long as you maintain constant flood
    lube/coolant, and consistent feed so you alway produce a chip.


    Opus

  4. #4
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    Re: Can anular cutters drill 304 stainless?

    Just curious , Mag Drill ...1/2" hole...3/4" 304 stainless steel plate.... ??? You have a plan ?? Sounds interesting. Even high speed steel should cut stainless, just not a long as cobalt, and carbide . Speed control, and lubrication will make a big difference in tool life. How many holes do you have to make, and is it done in place or at the shop.
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  5. #5
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    Re: Can anular cutters drill 304 stainless?

    Quote Originally Posted by albrightree View Post
    Just curious , Mag Drill ...1/2" hole...3/4" 304 stainless steel plate.... ??? You have a plan ?? Sounds interesting. Even high speed steel should cut stainless, just not a long as cobalt, and carbide . Speed control, and lubrication will make a big difference in tool life. How many holes do you have to make, and is it done in place or at the shop.
    Done in shop, I know a regular twist bit will work, but I'd have to sharpen it at a lower angle than typical, and probably have to resharpen a lot, lower the rpm to 200ish and lube like crazy

    I was wondering if the anular cutter would help speed it up

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  6. #6
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    Re: Can anular cutters drill 304 stainless?

    I've used the carbide tipped hole saws from mcmaster on thicker stainless, and they last a long time in the drill press(with a hand drill the break very easily if you dont keep it straight). It should save a fair amount of time, you won't have to drill with 3 different sizes, and won't need sharpening either(depending on the quantity). Make sure you add a little cushion for extra cutters, the carbide are brittle. You never know what you'll find when your drilling thicker plate, every once in a while you find something uncuttable in there.

    Good luck
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  7. #7
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    Re: Can anular cutters drill 304 stainless?


  8. #8
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    Re: Can anular cutters drill 304 stainless?

    https://hougen.com/downloads/Hougen_...tter_Guide.pdf

    page 13, and page 16 have some good advice too.
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  9. #9
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    Re: Can anular cutters drill 304 stainless?

    Speed and feed. It's always slower. Lots of oil/coolant. Annular cutter yes but not sure I'd want to do that with a mag drill....

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  10. #10
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    Re: Can anular cutters drill 304 stainless?

    Shouldn't be an issue. Stock up on anchor lube.
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  11. #11
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    Re: Can anular cutters drill 304 stainless?

    I’ve seen anular cutters/mag drill used on stainless. Not sure what
    type of stainless.(it was on a seawater intake at a power plant).
    It looked and sounded like it was a little tough on the cutting tool.
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  12. #12
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    Re: Can anular cutters drill 304 stainless?

    Quote Originally Posted by xryan View Post
    Speed and feed. It's always slower. Lots of oil/coolant. Annular cutter yes but not sure I'd want to do that with a mag drill....

    Sent from my LM-Q710.FG using Tapatalk
    Yeah the mag drill isn't the best way, it won't stick to the 304, but right now that's the only way I can use an anular cutter

    Quote Originally Posted by M J D View Post
    Shouldn't be an issue. Stock up on anchor lube.






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  13. #13
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    Re: Can anular cutters drill 304 stainless?

    We have the Hougen 904 mag drill at work and have the vacuum base for non ferrous materials. The vacuum base works great and holds the drill securely on the material.
    It just uses shop air to create the vacuum.
    If you have access to a mill you can get an adapter for annualar cutters.
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  14. #14
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    Re: Can anular cutters drill 304 stainless?

    Quote Originally Posted by MetalMan23 View Post
    Yeah the mag drill isn't the best way, it won't stick to the 304, but right now that's the only way I can use an anular cutter









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    You need the optional 304/316/6061 magnet.

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  15. #15
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    Re: Can anular cutters drill 304 stainless?

    You can mount an annular cutter in a Bridgeport mill and have at it. Or you can clamp the bar into a Kurt vise and magnatize to the sliding jaw. Or you can clamp a steel plate on the stainless and then magnatize to the steel and go to work.

    Thread cut dark is my cutting oil of choice for stainless.
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  16. #16
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    Re: Can anular cutters drill 304 stainless?

    How about a jig and a plasma cutter?

  17. #17
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    Re: Can anular cutters drill 304 stainless?

    Quote Originally Posted by flushcut View Post
    How about a jig and a plasma cutter?
    That's too much mess for me, besides my 45xp would have a very hard time with that

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  18. #18
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    Re: Can anular cutters drill 304 stainless?

    Quote Originally Posted by xryan View Post
    You need the optional 304/316/6061 magnet.

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    I've been keeping my eye out for that, haven't seen one available yet

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  19. #19
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    Re: Can anular cutters drill 304 stainless?

    We went to almost exclusively spade drills in our machine shop, probably one of the best moves we ever made, especially when dealing with 316L and some of the other exotics we had to deal with.
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  20. #20
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    Re: Can anular cutters drill 304 stainless?


    MetalMan23


    Quote Originally Posted by shovelon View Post
    You can mount an annular cutter in a Bridgeport mill and have at it . . .
    The first accessory I bought for my Mill was a Hougen 12,000 Series R8
    arbor - 49849 or 49853 [they spec. the same?] 205.00$ - 1999.

    https://hougen.com/cutters/magdrill/annular-cutter-accessories.html


    I have drilled 260 - .625" holes in .250" wall S/S tube without a resharp.
    It has 'a build-in' interior flood galley. It activates [opens] when the
    'retractable center' is depressed [= no-flow when not drilling].

    This system really makes 'shop-life' good - If you have access to a mill
    don't hesitate on this option . . .


    Opus



  21. #21
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    Re: Can anular cutters drill 304 stainless?

    Mill is a good way to go. I use flood coolant on tough ones.. Most cutters up to 1 inch will fit in a TG-100 collet very well. up to 1.5 a TG-150 collet works. I also modded a #40 tool holder to work with some of my 2 inch cutters.. I use the power knee to drill them. Works perfect. Although my Mag drill is awesome on my mill table too..
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  22. #22
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    Re: Can anular cutters drill 304 stainless?

    depends on the room you have . !. if you have the room. clamp a steel plate to the stainless with a piece of plastic between them . Then use your mag drill on the steel plate. very slow speed and lube the cutter as you should with any annular cutter. There are several brands of annular cutters with carbide teeth. It would just be extra insurance to use one. A regular annular cutter will work and if you just have a few holes to do I would use it. If you have several holes to do it would be worth getting a carbide tipped cutter. Run the cutter much slower than you would on steel. ss work hardens very quickly so be very careful not to let the cutter have contact with the ss unless it is making a chip.

  23. #23
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    Re: Can anular cutters drill 304 stainless?

    I made an annular cutter adapter for my Bpt. I have used a 1" hougen cutter on .500" stainless with no problems. Cuts nice. Lube or coolant as others have mentioned is needed.
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  24. #24
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    Re: Can anular cutters drill 304 stainless?

    You can buy Morse taper to 19mm weldon shank adapters. I have one for my pillar drill. Anything over 14mm I always reach for the annular cutters now.

    Having said that, if you have a lot of holes to drill and less than ideal setup on a pillar drill/improv mag base on stainless, then I'd probably rather go for a handful of twist drills - sharpening twist drills is a LOT cheaper and easier than sharpening annular cutters. It's rather easy to burn out small cutters like 1/2" too, and gets expensive after a few breakages.

    Either annular cutter with a good rigid setup, right speed and lots of coolant, or do it with a twist drill after a 3/16 pilot.

  25. #25
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    Re: Can anular cutters drill 304 stainless?

    I use annular cutters all the time on 304 and 316. I bought the R8 to annular adapter from McMaster for like $80 years ago for the Bridgeport. When I drill in place, I just put a wypeall (heavy duty paper towel) between the stainless and a 1/2" steel plate. Clamp it good and I have never had a problem. Just dont put the clamp in the back since the plate will rise and break the bit.

    I use a water heavy oil mix to keep the stainless cool. It will heat up fast, but with practice you can see when it is about to cut through, then stop and let it cool a couple seconds and oil it up, finish your cut and the slug will pop out. If you drill through while pretty hot, the slug can be a pita to remove.



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