Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 14 of 14
  1. #1
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default Source for 20degree pressure angle 10dp involute gear cutters

    I'm having a very hard time finding a source for 20degree pressure angle 10dp involute gear cutters. All the import stuff and second hand eBay cutters are all 14.5degree. I need to cut 22, 24, 26 tooth gears. Does anyone know of a source?

    There are some US manufacturers but none are willing to ship out here. Ideally a used tooling place would be great.

    Thanks everyone

  2. #2
    Join Date
    Aug 2008
    Location
    near Rockhampton
    Posts
    6,216

    Default

    Depending on accuracy required, why not single tooth cut them with a cutter made via the button process.

    OR CNC with gearotic to make the g-code.
    Gold, the colour of choice for the discerning person.

  3. #3
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    These are for a screw cutting gearbox, so the tooth form probably isn't critical but the surface finish and pitch accuracy are important. Do you have a link to a description of the two button process? I've heard about it before but never used it.

    Sent from my Nokia 8 Sirocco using Tapatalk

  4. #4
    Join Date
    Feb 2013
    Location
    Laidley, SE Qld
    Posts
    1,038

    Default

    There are any number of new metric 20° PA gear cutters available on AliExpress. Could they be used as a work around considering the end use of the gears?

    The 2 button system is covered in Ivan Law's gear cutting book and Sir John covered the system in several articles which will be dotted around the net.

  5. #5
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    Ahhh yep I have found a good article by john, I think that's worth pursuing for sure.

    Does anyone in Melbourne have a copy of Ivan laws book I could photocopy? Or know where I can get a copy? I'm in a bit of a rush on this one

    I don't think a module gear will do as I have a lot of money invested in the long cluster gear I have had made, hardened etc

    Sent from my Nokia 8 Sirocco using Tapatalk

  6. #6
    Join Date
    Aug 2012
    Location
    Greenmount, W.A.
    Age
    70
    Posts
    272

    Default

    [QUOTE=caskwarrior;1948014]Ahhh yep I have found a good article by john, I think that's worth pursuing for sure.

    Does anyone in Melbourne have a copy of Ivan laws book I could photocopy? Or know where I can get a copy? I'm in a bit of a rush on this one

    You can download a pdf copy of Ivan's book from US Archives. Quality is not good, but reading it may help you to proceed with your project and buy a copy. You will find it here:
    https://archive.org/details/Workshop...s_Gear_Cutting

    Regards,
    Alan.

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

    Default

    John Stevenson was the guru on HSM for this sort of work A form tool for gearcutting
    Gold, the colour of choice for the discerning person.

  8. #8
    Join Date
    Mar 2014
    Location
    South of Adelaide
    Posts
    1,225

    Default

    Ash Gear & Supply TEL:248.374.6155 FAX:248.374.6255 - Gear Cutting tools the same day!
    Ashgear in the USA ship to Australia. We have bought a few cutters off them at work. Only catch is you have to pay by wire transfer.

  9. #9
    Join Date
    Oct 2017
    Location
    Lismore, NSW
    Posts
    58

    Default

    Caskwarrior,
    You could try Tracey Tools LTD ([email protected]). They are a UK company & their service is very good. I have bought quite a few 20˚PA, gear cutters from them at a fraction of the cost of elsewhere. Some were second hand but had been sharpened correctly & all are UK made.
    Regards,
    Don.

  10. #10
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    57
    Posts
    2,651

    Default

    There are hobs on eBay from the U.K. if that's of any use.

    Steve

  11. #11
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Hi Guys,

    I thought that "Module" and "DP" were two ways of describing the same thing ?
    Best Regards:
    Baron J.

  12. #12
    Join Date
    Nov 2008
    Location
    Sydney
    Posts
    112

    Default

    Caskwarrior, It might be worth a call to Mick Moyle's in Sydney. They have all kind of stuff, both new & SH.

    Chas.

  13. #13
    Join Date
    Oct 2011
    Location
    Norwood-ish, Adelaide
    Age
    59
    Posts
    6,540

    Default

    Quote Originally Posted by BaronJ View Post
    ...I thought that "Module" and "DP" were two ways of describing the same thing ?
    Yes...and no.
    DP (Diametric Pitch) is the imperial way of specifying gears. Module is the metric way. (DP= M/25.4 is the relevant formula I think)
    Most usually DP system gears have a 14 1/2 degree pressure angle and Module have 20 degrees (although pressure angle is independent of system)

    So while a 10DP gear is almost the same as a M2.5 gear, it's not quite.

    Ivan Law's workshop practice book on gears explains it in greater detail.

    Michael

  14. #14
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Hi Michael,

    Thank you for that explanation!
    I do have Ivan's book, though I've not really studied it in any depth. I've not made any gears so its not been at the top of the list.

    Obviously I've misunderstood the distinction between imperial and metric measurements and made a poor assumption.
    Best Regards:
    Baron J.

Similar Threads

  1. scrounging about: 10dp cutters and a flat belt
    By StrayAlien in forum METALWORK GENERAL
    Replies: 5
    Last Post: 29th Aug 2017, 11:35 AM
  2. Sketchup Involute gear Plugin : Export 3d print file
    By steamingbill in forum METALWORK GENERAL
    Replies: 3
    Last Post: 11th Feb 2016, 09:30 PM
  3. Back gear pressure angle
    By morrisman in forum THE HERCUS AREA
    Replies: 9
    Last Post: 23rd Oct 2014, 10:11 PM
  4. involute cutters for hercus gears
    By tanii51 in forum THE HERCUS AREA
    Replies: 2
    Last Post: 12th May 2013, 06:32 PM
  5. Replies: 7
    Last Post: 6th Dec 2012, 05:45 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •