Chamfering a hole on the side of a cylinder

[RwSkinner]

I have a round cylinder, that has a cross drilled hole in it. When I chamfer that hole, it's an even chamfer all the way around, and if I used a 5 axis machine.
I need to represent the fish eye chamfer, meaning the lower edges are barely broke, but the higher edges have a larger chamfer.

IOW, like if you just plunged a 45 Deg. chamfer tool down into a cross drilled hole, on a cylinder.
Is this possible, or will I need to make a taper hole wit the hole tool, or create a shape and extrude the material out?

 

[HaroldL]

Create a plane tangent to the cylinder then use the hole tool to create the chamfered hole on that tangent plane.

 

[RwSkinner]

I got it, I inserted a hole over the top of it with the tapered sides.

 

[ynnek]

A method I found that works is to make a square "shaft", let's call it 1.000 inches. Place the hole here I need it. I then apply the chamfer. Next, next I apply a 0.500 radius to all corners. Works every time.

 

[Ken226]

I do these as close as I can to the way an actual chamfer mill would cut the feature.

A sketch, and then a revolve cut gives a good simulation of the way a chamfer mill would cut it on a milling machine.

 

[HaroldL]

A method I found that works is to make a square "shaft", let's call it 1.000 inches. Place the hole here I need it. I then apply the chamfer. Next, next I apply a 0.500 radius to all corners. Works every time.

I do these as close as I can to the way an actual chamfer mill would cut the feature.

A sketch, and then a revolve cut gives a good simulation of the way a chamfer mill would cut it on a milling machine.

View attachment 37440

Either way seems like a lot of extra work when you can define the hole AND the chamfer with a Plane and the Hole Tool.
Just sayin'.

 

[Ken226]

Either way seems like a lot of extra work when you can define the hole AND the chamfer with a Plane and the Hole Tool.
Just sayin'.

View attachment 37443

Well, im glad you posted that.

Yes, it does work. And quite well at that!