The Shop > CNC
CNC tapping with a floating tap holder
awemawson:
--- Quote from: PK on April 08, 2017, 09:22:22 AM ---My floating head cost $20.
:-)
--- End quote ---
Each of mine weren't far off that, but having a turret of 16 tools you might as well fill it :lol:
PK:
--- Quote from: awemawson on April 08, 2017, 04:03:10 PM ---Each of mine weren't far off that, but having a turret of 16 tools you might as well fill it :lol:
--- End quote ---
Meh! Tool changers are so yesterday! Here's one I whipped up one rainy weekend.
More here http://www.caswa.com/cncathome/spindles.html
(Welcome to troll fest folks! :beer:)
PK:
--- Quote from: Spurry on April 08, 2017, 12:25:16 PM ---That looked a very interesting item in your mill. Unfortunately, due to age and the racket going on in the background, I could not really make out what you were saying.
Were you describing the holder or just chatting about it?
--- End quote ---
Sorry Pete, don't worry, the commentary in my videos is normally just me prattling on about nothing in particular.
In this case an upcoming job at work (where we make electronics) is going to require 2400 holes drilled and tapped M3.
This turned out to be the kick in the pants I needed to hook up reverse on my mill spindle at home.
The spring loaded floating tap holder makes this very easy:
Feed the tap down at the thread pitch. In this case the spindle was running at 600RPM so I fed at 600 x 0.5mm = 300 mm/min.
Stop feeding and turn the spindle off. The tap continues to advance, pulling the head of the floating tool holder down against the spring while the spindle decelerates.
Start the spindle in reverse, ignore the spin up time and either rapid back up to the clearance height (as I did in this case) or, if the tapping depth is > the travel on the floating head, feed up at the tap pitch.
Stop the spindle and the slow down time is enough for the tap to flick up out of the hole.
Re the Mill.
I don't have many shots of the mill in it's finished CNC'd state, but the early work is here:
http://www.caswa.com/cncathome/X3.html
PK
PK:
--- Quote from: Joules on April 08, 2017, 01:15:53 PM ---PK, is that made or bought price.
--- End quote ---
https://www.aliexpress.com/item/SL25-WER216-80L-Floating-straight-shank-tapping-collet-chuck-and-tapping-holder-for-lathe/32442849161.html?spm=2114.13010608.0.0.e0fnGh
I failed to notice that the shank was 25mm, so it got turned to 20mm to fit in the 20mm R8 collet that all the other toolholders I use go into.
:clap: (sorry, 7YO sitting on my lap insisted that was the appropriate smiley).
PekkaNF:
--- Quote from: PK on April 08, 2017, 06:18:21 PM ---(Welcome to troll fest folks! :beer:)
--- End quote ---
Um...why? It all looked very good to me.
Welcome to Steel Fest :D
http://www.steelfest.fi/bandit
--- Quote from: PK on April 08, 2017, 06:51:28 PM ---https://www.aliexpress.com/item/SL25-WER216-80L-Floating-straight-shank-tapping-collet-chuck-and-tapping-holder-for-lathe/32442849161.html?spm=2114.13010608.0.0.e0fnGh
:clap: (sorry, 7YO sitting on my lap insisted that was the appropriate smiley).
--- End quote ---
Nice find. I should order one for manual use.
I remember when my daughter insisteed filling end of the post with smileys and sometimes I forgot to edit them out...now she has her own instagram and what not.
Pekka
Andrew..I am sorry. I stumled with taggs....deleted wrong one and got even tag nesting wrong.
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