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drilltrouble 15n20
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Thread: drilltrouble 15n20

  1. #1

    drilltrouble 15n20

    I have serious troble drilling holes in 15n20, 3-5mm, i have tried 200-700rpm with coolingfluid and with different force but nothing seems working?
    Steels like 01 and AEB-L is a pice of cake compared to this 15n20...?

    Fortunately i know how to resharp my drills and to stop drilling before they turn blue otherwise i had to buy drills by the hundreds.

    any tips would be appreciated!

  2. #2

    Join Date
    Oct 2011
    Location
    Manchester UK
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    6
    Ive never had a problem drilling it, it should be much easier than O1 to drill (the Mn makes O1 harden just by looking at it!)

    If in doubt I run slow with a lot of pressure. If your not seeing swarf once the drill should have bitten, stop, regrind, try again

  3. #3
    ok i will try apply more pressure and keep the swarf even, thank's for the tip!

  4. #4
    Senior Member
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    Mar 2011
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    Cardiff, UK
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    Are you sure it's in annealed condition?

  5. #5
    Senior Member Justin0505's Avatar
    Join Date
    Feb 2011
    Location
    Minneapolis, MN
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    1,433
    Sounds like it isn't annealed. Can you easily scratch it with a hacksaw blade or file?
    "I gotta tell ya, this is pretty terrific. Ha hahaha, YEAH!" - Moe (w/ 2 knives). http://www.youtube.com/watch?v=YVt4U...layer_embedded

  6. #6
    yes it should be annealed, i often use the file with no trouble but now that you guys have mentioned it i'll trow it in my owen and normalize to see if there is any difference.
    when hardened the file dont scratch it anymore

  7. #7

    Join Date
    Mar 2011
    Location
    Bangor Maine
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    I file will scratch a properly heat treated blade in most instances as the working harness of this steel is softer than the working hardness of a file. If the 15n20 was previously used, such as in a big saw blade, that is what you should expect. I file will usually not scratch on a blade that his hardened, but not yet tempered. I have to normalize the 15n20 that I got from a bandsaw blade.

  8. #8
    The strips and sheets i bought from company are all new-produced so i guess they should be in annealed state?
    I tried using more force and all of a sudden things went very smoth vith even swarf
    Was hoping i didnt had to put them trough a long soft-annealing process

    more force overcame that little squeaksound it sometime gave off... i've been drilling like a sissy

    Thank you for helping me!

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