Free 186 More Best Homemade Tools eBook:  
Get tool plans

User Tag List

Page 3 of 3 FirstFirst 1 2 3
Results 21 to 23 of 23

Thread: Can you make bottoming taps?

  1. #21
    hdrideblue's Avatar
    Join Date
    Apr 2014
    Posts
    10
    Thanks
    0
    Thanked 3 Times in 2 Posts
    Quote Originally Posted by gpete View Post
    If you are using a high speed steel tap you don't need to worry about getting it too hot when you grind it. They are not carbon steel and do not respond to heat like a carbon steel does. It was made to replace carbon steel cutters so that turning speeds and drilling speeds could be increased to the point that a carbon steel tool would lose it's temper. I seem to remember an article about HSS wherein they claimed it would continue to cut at a red heat. GP
    if you look back at my post I said grind slow and repeat slowly cut it down or it gets brittle and breaks and I repeat you have to use slow even grinding. jimbo

    186 More Best Homemade Tools eBook

  2. #22

    Join Date
    Mar 2016
    Posts
    8
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Quote Originally Posted by hdrideblue View Post
    if you look back at my post I said grind slow and repeat slowly cut it down or it gets brittle and breaks and I repeat you have to use slow even grinding. jimbo
    You may be right about brittle and break but I was responding to the ideas in some other posts about drawing the temper as in carbon steel. I have made bottoming taps out of taper taps and did cool them but it was because they got too hot on the fingers. It doesn't take too long to grind one down. Also better to start the threads with a taper tap and finish with the home ground bottoming tap.

    2,000+ Tool Plans

  3. #23
    Supporting Member
    Join Date
    Mar 2012
    Location
    Ontario, Canada
    Posts
    14
    Thanks
    1
    Thanked 6 Times in 4 Posts

    dtech's Tools
    Yes,
    I save broken ones or ones that start to wear or chip on the bottom for this purpose.
    You can take a zip wheel and cut them off. Keep the tap cool like every one else says.



    2,000+ Tool Plans

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

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