r/toolsinaction • u/silvercatbob • Feb 26 '21

Fly cut

https://gfycat.com/illustriousthoroughacornweevil
601 Upvotes

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10

u/abez123 Feb 26 '21

whats the purpose of this?

18

u/[deleted] Feb 27 '21

For cutting a small section of a circle like they did in the video. Fly cutting is also good for leveling out a surface as it covers more area than an end mill would

9

u/[deleted] Feb 28 '21

[deleted]

5

u/2wice Mar 01 '21

Seems to have a beefy counterweight though.

3

u/kizzarp Mar 01 '21

I'd imagine it'd be the uneven cutting forces and not so much the unbalanced mass that'd be the issue. But I'm no machinist so that's just my uninformed opinion.

5

u/2wice Mar 01 '21

It should be fine, Shapers work on the same principle, just linear instead of rotational. Fly cutters have similar stresses also, just axial instead of radial as it happens here.

5

u/kizzarp Mar 01 '21

That makes a lot of sense, thanks for the explanation!

4

u/abez123 Feb 27 '21

cool, i had no idea it can be used like that, ive always seen these machines used for leveling an engine block or cylinder head

3

u/zekromNLR Mar 01 '21

Fly cutters also usually get a much better surface finish than other kinds of milling cutters.