Learning to tap

[Fueler]

Learning the various tapping techniques. I have run into a recurring issue.

Example: for a 3/8-16 thread, I have a .315 hole and a .300 diam. single point cutter.

Cutter goes straight down the center first BUT simulation gives me a big RED interference warning on the first down cut.

There should be clearance there, yes?

Is  360 just being too cautious?

OR

Am I supposed to use a smaller diam. cutter?

I already know that a smaller cutter does not throw a RED but wondered why it does not like the .300 diameter.

Thanks

[Steinwerks]

Sounds like you're thread milling, not tapping.

Can you export your file as a .F3D and attach it here? I suspect what is happening is the shank doesn't have enough clearance for the thread depth and collides with the stock, but it's hard to diagnose without the file.

If you haven't exported a file yet, here's a good rundown: https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/How...

[Fueler]

here is an example of what I see. I have ignored the warning and successfully done the single point milling.

The hole is .201, The cutter diameter is .180. I dunno but it looks like a bug.

[Steinwerks · Accepted solution]

It's giving you a collision warning because it thinks there's stock where a hole should be.

Adding a drilling operation eliminates the collision warning when both are simulated.

File attached.