On 3/19/24 11:19, Dave Engvall wrote:
Indeed, using drive dog threaded holes. Initially I did think about a flat disc
but cannot see that gives me
any better holding strength than the dogs with a slight tee on top so one
gets both drive and cat40 retention.
The other problem is keeping the spindle from rotating while I torque down the
tool.
Tool holder is a Cat40 SK16 which gives me better rigidity than a ER collet.
The concept is
to use AlCrN coated tools with coolant in hopes of getting decent tool life. A
local shop is getting
about 5000 feet of path length/cutter but also using coolant! Even with light
cuts that is moving a
lot of material in my case 8620 or 20 carbon steel, not too challenging.
Have you seen the "Cats Claw"? Or any of the dozens of tools you bolt to
a table to be used to hold a cat 40 while installing tools?
On Mar 18, 2024, at 5:26 PM, andy pugh <bodge...@gmail.com> wrote:
On Mon, 18 Mar 2024 at 21:13, Dave Engvall <dengv...@charter.net> wrote:
So I’ve built Tee-nuts that will retain the cat40 assuming the
M6 shcs hold. Planned use is to use small tools at max spindle speed.
(4K). I need ideas to clamp the cat40 so I can torque down tool while in
the spindle.
I am not 100% sure what you are describing.
Are you saying that you are using some tapped holes in the spindle face to
hold Tee nuts to retain the tooling? Or are you maybe using the drive dog
threaded holes?
Whilst a proper repair to the drawbar seems like the correct fix, I think
that a machined ring to retain an ER collet holder might be better than
what I think you are describing.
(Then you can just swap tools and collets)
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is designed
for the especial use of mechanical geniuses, daredevils and lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912
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Cheers, Gene Heskett, CET.
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