Countersink Depth Chart

1. ## Countersink Depth Chart

Awhile back I found a chart that told you how deep to run a countersink to obtain a fixed diameter. I can't seem to find where I found it and I can't find my printout of it. I know there are calculator programs that you can buy, but this was a really cool chart. It had all dimensions for 82', 90' and 100' countersinks. Does anybody know where to find something like this?

2. I can compose an Excel spreadsheet for this if you're interested. I can't do it overnight however. As I get older I get slower. If you want it, I'll do it. Let me know.

Gene

3. ## Countersink Depth Calculator

Here is a calculator that solves for depth: http://janproducts.com/countersink_calculator.html

4. Drill Point Angle >>>> Factor

(60 degree)>>> .866 x Dia = Point Depth
(82 degree)>>> .575 x Dia = Point Depth
(90 degree)>>> .500 x Dia = Point Depth
(118 degree)>> .300 x Dia = Point Depth
(120 degree)>> .388 x Dia = Point Depth
(135 degree)>> .207 x Dia = Point Depth

Dia is hole chamfer diameter, not tool diameter.
Point depth is how deep to drill to get the desired chamfer diameter with that drill point angle.

5. ## Re: Countersink Depth Chart

Ok,

so if my diameter of my countersink of the material is .75 of 82 degrees, im going to take .575x75=.43125 for depth. isnt that a little bit to much...should i take that awnser .43125/2=.215625

6. ## Re: Countersink Depth Chart

90 degrees would be .375" deep. You'd have to go deeper with an 82 degree, so .43125" is the answer you're looking for.

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