topic Re: Countersink slots. in Fusion Design, Validate & Document Forum

Countersink slots.

sales3MPAD — Wed, 30 Jun 2021 00:34:42 GMT

I am trying to create a slot that is countersunk for a flathead screw. I know how to create a hole with a countersink, and I made the slots using the sketch slot center to center command. Then I used Push pull to remove the material. Slots are perfect except I cannot figure out how to add a countersink to the edges. I have searched the varied forums with no success. any help is appreciated.

Re: Countersink slots.

TheCADWhisperer — Wed, 30 Jun 2021 01:06:39 GMT

Chamfer.

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

Re: Countersink slots.

jhackney1972 — Wed, 30 Jun 2021 01:20:39 GMT

Here is one way. I used the dimensions, from Fusion 360 database, for a 0.375 countersunk hole. Model is attached.

Re: Countersink slots.

sales3MPAD — Wed, 30 Jun 2021 01:27:39 GMT

No real need to upload it. It's a simple plate with a slot in it. I have all that. I just need to know how to countersink it.

Re: Countersink slots.

sales3MPAD — Wed, 30 Jun 2021 01:30:46 GMT

thanks. I will try that. Where is the table located in fusion? I am using a 6-32 screw for the slot so need to create a triangle sketch half the diameter? Then sweep. I'll try.

Re: Countersink slots.

jhackney1972 — Wed, 30 Jun 2021 01:38:08 GMT

I just started the creation of a countersunk hole using the hole command and copied the values from the display for a clearance hole then cancelled the command.

Re: Countersink slots.

davebYYPCU — Wed, 30 Jun 2021 02:45:13 GMT

Chamfer.

Re: Countersink slots.

etfrench — Wed, 30 Jun 2021 06:49:53 GMT

Get the values like @jhackney1972 says, but do the chamfer like @davebYYPCU says 😁

The values in the chamfer command were taken from the Hole dialog:

You should be aware that imported models from McMaster-Carr won't sit flush in the slot. (The 6-32 100 degree and 82 degree models are switched in McMaster-Carr, so verify the model after downloading.)

Re: Countersink slots.

sales3MPAD — Wed, 30 Jun 2021 08:21:53 GMT

thanks for all the great suggestions. I went with the original solution offered because I knew by sketching the angles I would get a true countersink angle. It was kinda tough getting the profile created and lined up correctly to the axis but eventually it worked and I learned something. So thank you all I will try the chamfer idea as well to see if that turns out easier.

Re: Countersink slots.

sales3MPAD — Wed, 30 Jun 2021 08:35:08 GMT

I didn't import anything from MC I just used the data in the hole function. Dia was the same so since I created the profile with 82 degrees full angle.. It should be fine. They look great. and I am hopefully becoming less of a noob.

Re: Countersink slots.

steverrk — Sun, 09 Feb 2025 09:12:46 GMT

I am trying to create this exact thing.. a slotted countersunk hole.
I can't seem to "copy the values from the display" as posted while I have the hole command window open. either this is rocket science or doing this is completely different now in later versions of fusion 360 because for the life of me i can't figure this out. do i have to copy each individual measurement from the hole window into the chamfer window or something?

Re: Countersink slots.

g-andresen — Sun, 09 Feb 2025 09:47:47 GMT

Hi,

Please share the file for demonstration

File > export > save as f3d on local drive > attach to post

günther