Fly Cutter

**rossbotics** · Jul 20, 2015, 09:38 AM

Made this little fly cutter with an integrated R-8 shank, It's made from 1.500" round 4140 steel, pre-heat treated to a 27-32 RC. It doesn't have an adjustable cutting diameter, It's a fixed 1.500" diameter which is plenty enough for me, I have adjustable ones but they make such a large cutting diameter, It holds a 1/4" high speed steel cutter or carbide, This fly cutter will save on end mills too.

When I drew this up in cad I drew it up as 1.250" round, But when I went to my steel rack all I had was 1.500" round, I wasn't about to turn it down so I left it at 1.500", But I didn't change the cad drawing, never the less it wouldn't make any difference if it was 2.000" or what ever, the measurements would not change.

Below are some photos
As always thanks for looking and happy machining

Doug

Click here to purchase a set of these plans http://www.homemadetools.net/forum/r...y-cutter-50371

Attachment 3985

Click here to purchase a set of these plans http://www.homemadetools.net/forum/r...y-cutter-50371

**kbalch** · Jul 20, 2015, 12:01 PM

Thanks Doug! I've added your Flycutter to our Fly Cutters category, as well as to your builder page: rossbotics' Homemade Tools. Your receipt:

Flycutter by rossbotics

tags: fly cutter

**sniffipn** · Jan 3, 2019, 11:30 PM

good morning doug. i have purchased drawing. please share cutter geometry.
thanks.
david

**rossbotics** · Jan 4, 2019, 02:20 AM

Hi sniffipn and thank you for your purchase, you can use 1/4" square HSS tool bits and sharpen it like your going to use it on a lathe for a right hand cut, or you can use AR-4 carbide tipped tool bits.

Thanks Again
Doug

**jjr2001** · Jan 4, 2019, 09:27 AM

Great plans Doug,

I used an existing R8 collet to setup my lathe and followed your plans.
My steel was 1 3/8" in diameter instead of 1 1/2" so this one is a bit smaller.
I might make another using a 1 3/4 diameter steel and call it a set.

Cheers, JR