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  1. #1
    Join Date
    Feb 2013
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    Laidley, SE Qld
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    1,038

    Default Yet another method of DIYing spur gears

    Quite clever, but I'm thinking its only suitable for low speed gears, lathe change gears etc.

    https://www.youtube.com/watch?v=eC-OctJoWv4

  2. #2
    Join Date
    Jul 2008
    Location
    near Warragul, Victoria
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    3,718

    Default Yes

    Been watching his Utube stuff for some time, he certainly likes his trig. calculations

    That is a clever idea but it is a rather slow and tedious method.

  3. #3
    Join Date
    Aug 2011
    Location
    Melbourne
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    Default

    It's thinking outside the square which I like!

    True, it's slow but it's an option for sure.

    Simon

    Sent from a galaxy far far away
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  4. #4
    Join Date
    Mar 2014
    Location
    South of Adelaide
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    1,225

    Default

    Sandvik came out with a tooling and software package for doing this on 5axis mill/turn lathes about 5 years ago, they called it invomilling.

  5. #5
    Join Date
    Aug 2019
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    Revesby - Sydney Australia
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    56
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    1,184

    Default

    Quote Originally Posted by snapatap View Post
    Sandvik came out with a tooling and software package for doing this on 5axis

    5 axis? Blimey! Seems like total overkill.

    I guess you need that for milling helical/herringbone/hypoid ?


    1) On a CNC lathe though, just a milling head should be able to make any gear shape?

    2) For spur gears, you only need appropriate CAD modelling, and 2 axis CNC mill?
    (or a laser/water cutter)

  6. #6
    Join Date
    Aug 2008
    Location
    Melbourne
    Age
    34
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    1,075

    Default

    Quote Originally Posted by snapatap View Post
    Sandvik came out with a tooling and software package for doing this on 5axis mill/turn lathes about 5 years ago, they called it invomilling.
    Video from 10 years ago https://www.youtube.com/watch?v=_LYaMqaUpqw

    It's also far better than the home hack method because it actually interpolates a proper involute around the C axis (or A axis depending on the machine) instead of approximating it with just straight cuts. Only 4 axes are required for spurs, 5 for helicals.
    Gear cutting specialists and general engineers www.hardmanbros.com.au
    Fine pitch gear cutting from 0.1 Module www.rigear.com.au

  7. #7
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    6,216

    Default

    Gearotic will spit out the code for a CNC mill but uses an end mill to cut the gears like this. It also does a lot of different types of gears.

    It seems a perfectly satisfactory method to cut gears for general use.
    Gold, the colour of choice for the discerning person.

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