Specifications for 2H High Speed Universal Vertical Head Drive Gear
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  1. #1
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    Default Specifications for 2H High Speed Universal Vertical Head Drive Gear

    I’m trying to find:
    1. Diameter of drive gear.
    2. Number of teeth on drive gear.
    3. Diameter/thickness of spacer ring.

    Thanks, Greg.

  2. #2
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    Default 2h drive gear for std hi speed head per John Oder from a previous post.. Thanks John!

    Quote Originally Posted by gregfortin View Post
    I’m trying to find:
    1. Diameter of drive gear.
    2. Number of teeth on drive gear.
    3. Diameter/thickness of spacer ring.

    Thanks, Greg.
    Mike G. (Ramsay1) was kind enough to share the "spacing disc" diameters on his 24 and 30 tooth vertical head drive gears applicable to 2H/2CH

    These are 4.025" on the oft missing 30T spindle gear, and 3.222" on the 24T installed in the head assy

    Since these roll together and control gear mesh, I am going to assume these are very near the actual pitch diameters of these gears

    By adding these two together, we get double the center distance = 7.247"

    Making center distance close to 3.6235"

    You can follow along in the math operations on page 15 in Earle Buckingham's Manual of gear Design - Section 3

    Mike said he used 9DP cutter

    Helix angle calcs out to 34.1134404 degrees

    Lead for 30T calcs out to 18.672175".

    Mike came close and used 18.626" when he set up his Low Lead box. He shows a photo in a recent thread and even specs the gears needed right from the Tables of Leads for the Model H DH

    Be sure to double check the gear setup in your lead box.. I think this is the correct setup for cutting the gear in question.. Ramsay 1
    Attached Thumbnails Attached Thumbnails img.jpg   helix-lead.jpg   dsc00004.jpg  

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  4. #3
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    Related thread: (at least the recent posts)

    Looking for kearney & trecker driver gear

    As to the DOING, you have to pay attention to the HAND. If the driven (24 teeth above) is RIGHT HAND helix, the driver (30 teeth above) HAS TO BE LEFT HAND

    And Greg, to answer your question on O.D., you would add two 9DP addendums to the 4.025, making a 4.2472" O.D. 30 tooth gear

    Mike: If you will, check the "B" and "C" dimensions on page 4 in the link in Post #61 of the thread linked above. Have any explanation of WHY that info comes up with a THREE INCH center to center value for 2H?

    j
    Last edited by johnoder; 03-06-2019 at 08:55 AM.

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    Default

    If you are interested, I have one for sale. Sent you a PM.


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