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Sine Plate plans

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Chuck in E. TN:
B-M,
Maybe the pictures I posted are confusing. The one of the tool in the vise was the setup I was using to flycut the plate. I posted that picture to show the inset of the plate into the round stock. It could be used in that orientation, but the true 'angle plate' use would be with the round stock held 90 deg to that shown. HTH!

Chuck

Brass_Machine:
That's what it is. I understand now. Thanks for clarifying.

Toolshed:
What amount of downward force do you think these can hold up to?  I'm thinking of making something similar for my drill press.  The plate might be 4-5" square, but needs to be really THIN since I don't want to take up too much of the miniscule 8" of throw I have. 

By way of the 'downward force', I was contemplating some sort of "knuckle"  joint, but not sure I could get enough positive pressure on the ball joint to hold up to much drilling force....

I guess I might just have to try it and see what happens.  :-)

PekkaNF:
You are bound to have "It depends..." type answer. From my bad memory 10-12 mm dia drill needs something like 200 kg force to feed it into structural steel, without pilot hole.

Your variables are material, drill, pilot hole and most importantly feed and how heavy handed you are.

My personal experience is that drilling needs a good support from below. Maybe you can use something light to make a setup and good clamps and jack screws to hold piece up.

Pekka

Toolshed:
Thank you!  That's what I figured I would hear.  I don't know all the little calculations that go into "Force x on this size bit equals a number"  200lbs would sound about right tho....Most of my drilling is 1/2 inch and less

ONE Reason I'm not an engineer....I didn't need a single math class to be able to tell people to reboot.  ;-)

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