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Thread: Gear cutting question

  1. #1
    Join Date
    Jul 2001
    Location
    Idaho Panhandle
    Posts
    444

    Post Gear cutting question

    Gentlemen;
    I am stuck (I think) in that I am not sure how deep to set the cutter into the gear blank. Mach. Handbook and other sources talk about “whole depth” but that seems to leave out “clearance”. Thirty-two DP gears figure from .0674 in. to .0708 in. for “whole depth” depending on my source. I have built a tailstock and mandrel for my rotary table so should be ready to cut metal soon. As per my last inquiry I plan a forty tooth and a one-hundred-twenty-seven tooth gear. The pinion to be brass and the spur to be aluminum. The aluminum should outlast me and be easier to cut!
    Jim

  2. #2
    Join Date
    Jan 2002
    Posts
    563

    Post

    Whole depth is the working depth plus clearance

    brent

  3. #3
    Join Date
    Mar 2001
    Location
    Nottingham, England
    Posts
    15,216

    Post

    Jim,
    Your first figure of 0.0674" is the correct one for the whole depth which, as Brent rightly says is the working depth , plus clearance.
    Usually if they are commercial cutters they have this information etched on them,
    Denotes as D+f=0.0674 where D is the working depth and f is the clearance.
    John S.
    .

    Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.




  4. #4
    Join Date
    Nov 2001
    Posts
    801

    Post

    we always took two cuts, even on gear shapers.
    Never can pick up and take the exact amount on the first part.
    good knashing
    kapullen

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