Free 173 Best Homemade Tools eBook:  
Become a founding member: 500+ tool plans, full site access, and more.

User Tag List

Results 1 to 6 of 6

Thread: Tapmatic - video

  1. #1
    Jon
    Jon is offline Jon has agreed the Seller's Terms of Service
    Administrator
    Supporting Member
    Jon's Avatar
    Join Date
    Jan 2012
    Location
    Colorado, USA
    Posts
    21,312
    Thanks
    6,477
    Thanked 30,738 Times in 8,525 Posts

    173 Best Homemade Tools eBook

  2. The Following 3 Users Say Thank You to Jon For This Useful Post:

    emu roo (Jun 18, 2021), freddo4 (Jun 19, 2021), nova_robotics (Jun 18, 2021)

  3. #2
    Supporting Member
    Join Date
    Sep 2018
    Posts
    551
    Thanks
    2,197
    Thanked 172 Times in 115 Posts

    nova_robotics's Tools
    It looks neat, but I don't understand how this can work.

    The detent based clutch requires the two halves to separate by some distance, lets call that distance z. So if tapping vertically in a mill or drill press, that will require that the distance between the workpiece and the chuck or collet be forced apart by distance z. But that can't happen in a mill, and is very difficult to make happen in a drill press. So the clutch will remain engaged and you'll break a tap.

  4. The Following User Says Thank You to nova_robotics For This Useful Post:

    HobieDave (Jun 19, 2021)

  5. #3
    Supporting Member Isambard's Avatar
    Join Date
    Aug 2019
    Location
    Hawke's Bay, New Zealand
    Posts
    42
    Thanks
    0
    Thanked 15 Times in 10 Posts
    I presume it works on the principle that if you stop the feed down, or retract the feed, the tap will continue tapping down until the drive disengages...

  6. #4
    Supporting Member Frank S's Avatar
    Join Date
    Aug 2015
    Location
    Peacock TX
    Posts
    7,121
    Thanks
    906
    Thanked 5,620 Times in 2,681 Posts

    Frank S's Tools
    Quote Originally Posted by Isambard View Post
    I presume it works on the principle that if you stop the feed down, or retract the feed, the tap will continue tapping down until the drive disengages...
    When taping I would never engage a power down feed for one the feed rate will never match the TPI or the MPT of the threads .
    This device is more of a feedback clutch once the torque reaches a certain level t is going to try and skip the operator would have to be aware of how much torque feed back is required to force him to let up on the down feed before breaking the tap. User awareness is the key factor here, what works for him may not work all that well for some of the rest of us.
    A true tapomatic would reverse direction when lifting the feed handle
    Never try to tell me it can't be done
    When I have to paint I use http://kbs.justoldtrucks.com/

  7. #5
    Supporting Member Isambard's Avatar
    Join Date
    Aug 2019
    Location
    Hawke's Bay, New Zealand
    Posts
    42
    Thanks
    0
    Thanked 15 Times in 10 Posts
    Excuse me but did I mention power feed? A drill or a tap has to be fed to engage with the work.
    Like drill presses, turret mills have manual feed wheels or handles. Stop feeding or retract the quill
    will cause the attachment in question to disengage the drive as the tap engages deeper in the work-piece.
    Presumably spindle rotation is then reversed to back out the tap.

  8. #6
    Supporting Member WmRMeyers's Avatar
    Join Date
    Dec 2014
    Posts
    256
    Thanks
    32
    Thanked 92 Times in 61 Posts
    Quote Originally Posted by nova_robotics View Post
    It looks neat, but I don't understand how this can work.

    The detent based clutch requires the two halves to separate by some distance, lets call that distance z. So if tapping vertically in a mill or drill press, that will require that the distance between the workpiece and the chuck or collet be forced apart by distance z. But that can't happen in a mill, and is very difficult to make happen in a drill press. So the clutch will remain engaged and you'll break a tap.
    I guess we have to wait for the next video. If it works, I will be making one.

    Bill



    173 Best Homemade Tools eBook

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
  •