Gallery, Projects and General > The Design Shop
Short QC Biltz type tapping chuck
awemawson:
The 'in out' spring loaded travel makes up for the difference between the pitch of your thread and the pitch of your down feed, particularly when accelerating and decelerating.
More is better than less :bugeye:
PekkaNF:
Yes, but I am not making here rigid tapping.
More like limp tapping with manual quil feed :lol:
I was just thinkking that slight cushion might save a tap if I bump it down too fast.
Pekka
PekkaNF:
Bussy at work and some seasonal work at home.
Got few hours on this one. I'm having trouble locating a fitting spring for ball lock. I need a spring that fits over 25 mm tube. I don't need too much force, just to press 5 mm balls into contact. Stroke is about 5 mm and there is 15-20 mm of lengt available.
Thinking of making a spring, because I can't locate this size compression spring locally.
Found this video:
Will piano wire work?
I have always thought that spring needs heat threating after winding.
Pekka
WeldingRod:
You dont need heat treatment for your service.
Sent from my SAMSUNG-SM-G891A using Tapatalk
PekkaNF:
It did not go "As seen on TV" at all.
1: Only "musical wire" I found was 6m of 0,5 mm piano wire. Way too thin for this one.
2: Mandrel calculator or table (could not find metric) is good, found this one:
https://www.daycounter.com/Calculators/Springs/
Anyway decided to try this and produced four "springs", none of the succesfull on any application. But good learning experince.
Now I attacked to one pull string to make it larger and transform it to compression spring. Nearly correct size.....just OD should be ID and it is of wrong sex.
Pekka
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