Unibit Stepbit conspiracy theory - Page 2
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  1. #21
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    Ok I'll say it. Harbor Freight 3 pc kit. $8.99 or close. They work fine.


  2. #22
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    Quote Originally Posted by jamscal View Post
    Ok I'll say it. Harbor Freight 3 pc kit. $8.99 or close. They work fine.

    My garage door installer said the same thing. Just saying .

  3. #23
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    Quote Originally Posted by asawelding View Post
    So I'm pretty sure now that in some dimly lit conference room, thick with cigar smoke, there are a group of Billionaire tool manufacturers laughing at the ridiculous price tag they throw on multi-size sheet metal step drills. I just paid $60 bucks for a 3/16" - 1" bit.....
    So now you have a wide open, crazy profit market to make a few million in.
    Don't cry, join the club. Simple part, seems like lots of money.
    Mortgage the family farm and jump in.
    I make this type of stuff, have the needed machines paid for on my floor..... But I'm chicken and would not touch this market with a ten foot pole.
    Bob

  4. #24
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    Quote Originally Posted by dgfoster View Post
    Probably should just let it pass, but.... Nothing like racist remarks to clarify things and help in World harmony. No "Chicom" yet in this thread?

    Denis
    Yes I would agree, would have been smart to just let it pass. I read it as a true comment, and he did not use any disparaging names that are available if he intended any racial overtones. I thinking anyone calling racist is just picking nits, which there is way to much of in today's world.
    James

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  6. #25
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    Quote Originally Posted by asawelding View Post
    So I'm pretty sure now that in some dimly lit conference room, thick with cigar smoke, there are a group of Billionaire tool manufacturers laughing at the ridiculous price tag they throw on multi-size sheet metal step drills. I just paid $60 bucks for a 3/16" - 1" bit..... And it appears they have all agreed never to manufacture them in carbide, because if the bit would stay sharp for a little while, then they wouldn't be able to sell you a new HSS one for $60 when your buddy roasts your bit trying to drill a dry hole through 3/8" 304 Stainless... End rantAttachment 138534
    So, just as a matter of curiosity - just what part of "sheet metal step drill" applies to 3/8" 304 stainless?????

    IOW, it's the operator who's responsible here, not the tool.

    PDW

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  8. #26
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    Quote Originally Posted by PDW View Post
    So, just as a matter of curiosity - just what part of "sheet metal step drill" applies to 3/8" 304 stainless?????

    IOW, it's the operator who's responsible here, not the tool.

    PDW
    You are right sir, operator error. Just the cheapskate in me ranting about the price of replacement mostly. Forum good place for that, I reckon.

  9. #27
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    I use them all the time. In fact, I drilled a 3/4" hole through 1/8" 304 stainless yesterday. There are other things one can do that are more fun, like picking up dog poop, but it got the job done. Oh, yea, it was a Harbor Freight bit.

  10. #28
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    I have one around here somewhere that has 2 flutes, and no steps. I got it before i saw the first step bit. It's black oxided, not plated. Wish i knew where to get another, it's terrific for thin sheet, leaves no burr and will even make smooth holes in soda cans.

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    Quote Originally Posted by Mud View Post
    I have one around here somewhere that has 2 flutes, and no steps. I got it before i saw the first step bit. It's black oxided, not plated. Wish i knew where to get another, it's terrific for thin sheet, leaves no burr and will even make smooth holes in soda cans.
    It's unclear if this is a one or two flute bit, but otherwise this matches your description: McMaster-Carr

    I think there's three things which make it easy to screw up a step drill:

    1) it's easy to drill something too thick. Most step drills aren't supposed to be used on anything thicker than 1/8"

    2) the variable diameter makes it easy to forget how slow you're supposed to be turning it. To keep SFM the same while your drill increases in diameter from 3/8" to 1", you need to cut your RPM down by more than half (62.5%)

    3) as a single-flute cutter your feed-per-rev is going to be half what you'd expect with a normal drill, which many people compensate for by leaning into the feed.

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  13. #30
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    Using them in most air drills is a kiss of death, unless it is a SLOW speed drill with good torque and a teasing trigger. And use a decent cutting fluid/paste.

    For material like stainless and 4130, Hougen Rotabroach cutters are the dogs bollocks.

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    Quote Originally Posted by J. Randall View Post
    Yes I would agree, would have been smart to just let it pass. I read it as a true comment, and he did not use any disparaging names that are available if he intended any racial overtones. I thinking anyone calling racist is just picking nits, which there is way to much of in today's world.
    James
    A "true comment" that Hispanics are idiots?

    Pretty much the definition of racism.

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    304 ss at 40 sfpm at 3/8" dia is about 400 rpm
    .
    if you are running much faster i would say that is your real cause of going through a lot of bits too fast

  17. #33
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    Quote Originally Posted by adatesman View Post
    A "true comment" that Hispanics are idiots?

    Pretty much the definition of racism.
    Not all, but possibly HIS particular Hispanic maintenance man is an idiot.

    Stop looking for something to be butthurt about in everyone's post for fucksakes.

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    Quote Originally Posted by paulz View Post
    Not all, but possibly HIS particular Hispanic maintenance man is an idiot.

    Stop looking for something to be butthurt about in everyone's post for fucksakes.
    Did he say /his particular/ Hispanic maintenance guy? No. Rather, all Hispanic maintenance guys.

    Perhaps your opinion of this would be different if /you/ were Hispanic and tired of the racism.

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    Quote Originally Posted by adatesman View Post
    Did he say /his particular/ Hispanic maintenance guy? No. Rather, all Hispanic maintenance guys.

    Perhaps your opinion of this would be different if /you/ were Hispanic and tired of the racism.
    Lol, whatever Reverend Al.

    I could be Hispanic for all you know.

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  22. #36
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    Quote Originally Posted by paulz View Post
    Lol, whatever Reverend Al.

    I could be Hispanic for all you know.
    Exactly the point, if you'd stop and think about it. Which I'm guessing you didn't, given the Reverend Al comment.

    FWIW, I hear Black Hispanics are the worst. Not near as bad as Jews though.




    Cluing in yet?

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    Quote Originally Posted by paulz View Post
    Stop looking for something to be butthurt about in everyone's post for fucksakes.
    Also, I can't help but be amused by the fact that you're feeling butthurt by someone else being called out for their overt racism. Perhaps it's striking a bit close to home for you?

  24. #38
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    Quote Originally Posted by paulz View Post
    Drilling through anything other than sheet metal (like they do on American Chopper) is asking for failure.
    It's a high speed steel drill bit, it you run it at the correct SFPM, with cutting oil, and reasonable feed, you can use it on other than sheet metal. I have used them without issue on 3/8" hot rolled.

    CarlBoyd

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  26. #39
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    And just to put my 2¢ in, an experienced maintenance guy from Latin America probably knows how to baby a step drill because he's used to doing something with nothing. What you need a five-axis machining center for, some of those guys could probably do with a file.

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    Anyone else prefer sheet metal hole saws over unibit?
    Beats unibit hands down if the purpose is to make holes, not chips



    Also available with carbide teeth if you are in a hurry..


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