Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 3 of 3
  1. 19th December 2013, 10:20 PM #1
    morrisman's Avatar
    morrisman
    morrisman is offline GOLD MEMBER
    Join Date
    Jul 2008
    Location
    near Warragul, Victoria
    Posts
    2,500

    Default back gear broken tooth

    Hi

    My ( 9 hercus / sheraton ) back gear had a broken tooth . I built up a new tooth with weld and hand filed it to shape, this repair has lasted 3 years but it has broken again .

    I am thinking of tapping holes into the broken tooth base and then screwing in a couple of small studs, then brazing around the studs to build it up , then re cut the new shape with a proper gear cutter .

    Can somebody tell me the correct PA of the tooth , and what size gear cutter I need to buy ? Mike
  2. 19th December 2013 10:20 PM # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. 20th December 2013, 07:51 AM #2
    pipeclay
    pipeclay is offline GOLD MEMBER
    Join Date
    Jun 2007
    Location
    sydney
    Age
    64
    Posts
    3,566

    Default

    Should you be working out what is causing the breakage first.

    Did it break due to a bad repair?

    Did it break due to operator error?

    Is some thing not meshing correctly?

    Did it break whilst in use or when removing/fitting a chuck etc.

    Replacing the damaged area with steel could possibly transfer the cause somewhere else.


    Cutters are 16DP.
    PA is 20 degrees
    Cutters required No2 and No5.
  4. 20th December 2013, 11:20 AM #3
    morrisman's Avatar
    morrisman
    morrisman is offline GOLD MEMBER
    Join Date
    Jul 2008
    Location
    near Warragul, Victoria
    Posts
    2,500

    Default Tooth

    Quote Originally Posted by pipeclay View Post
    Should you be working out what is causing the breakage first.

    Did it break due to a bad repair?

    Did it break due to operator error?

    Is some thing not meshing correctly?

    Did it break whilst in use or when removing/fitting a chuck etc.

    Replacing the damaged area with steel could possibly transfer the cause somewhere else.


    Cutters are 16DP.
    PA is 20 degrees
    Cutters required No2 and No5.


    THANKS FOR THE gear cutter info

    The tooth broke again because of my less than ideal repair job.

    The repaired tooth was not meshing as it should have been, because my filing job was not the correct involute shape .

    regards ......... Mike
« Previous Thread | Next Thread »

Similar Threads

  1. 127 tooth gear
    By gpigeon in forum METALWORK FORUM
    Replies: 18
    Last Post: 26th March 2012, 09:14 PM
  2. broken tooth on back gear
    By morrisman in forum THE HERCUS AREA
    Replies: 5
    Last Post: 18th July 2011, 11:26 AM
  3. 28 tooth gear for al960
    By rfurzer in forum METALWORK FORUM
    Replies: 14
    Last Post: 6th February 2011, 01:19 PM
  4. Hercus 127 tooth gear
    By bob colles in forum THE HERCUS AREA
    Replies: 3
    Last Post: 8th January 2011, 02:19 PM
  5. Gear tooth count on Back/Bull Gear.
    By pipeclay in forum THE HERCUS AREA
    Replies: 31
    Last Post: 6th January 2010, 11:56 AM

Tags for this Thread

Posting Permissions

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

Forum Rules