#### benfica

##### Plastic

- Joined
- Dec 26, 2010

- Location
- Springfield, MO, USA

I am in the need to cut live threads in wood. I have read so many things about correct depth calculations and I needed to know what is the correct approach and calculations.

Heads up! I am terrible in math but I can use a calculator

Please try to explain really clear so I can put it in practice. Any other advice is much appreciated.

I have a router mounted on my BXA tool post with a 60 degree cutter and I am cutting V threads in wood (I made a video that showed to a friend how I did it).

The formulas I was given and saw on line were the following:

This link:

UN imperial screw thread calculator

.650/tpi = thread depth (I feel that this depth is not enough)

1/tpi = 0.xxxxxx

0.xxxxxx x .866 = thread depth (closer to where I need to be I think)

So what is true and what is not? I feel that this formula is closer to where I need to be. Thoughts?