.0625 face groove

[bowhunter]

having a little trouble with this one. i've been trying to do an internal face groove that is .0625 wide and .0625 deep but it starts at a depth of -1.000 on a diameter of 1.125 . I tried using a thinbit holder and only succeeded in breaking alot of inserts the material is 304 stainless. I also tried using the G74 face groove pecking cycle but to no avail. any pointers i'd appreciate them. thanks

[bborb]

A trepanning tool may be the answer.

[tobyaxis]

Have you tried High Speed Steel yet??? In some applications your better off with a tool that can flex a little and absorb the shock. Flood Coolant, light pecks, low feeds and speeds.

Try these guys too, they make good Trepanning Tools.
http://www.hornusa.com/eng/products/...e_grooving.htm

Not to say anything but make sure you have a good clearance on the heel of the tool. If it is too big or too small it will break.

Hope this helps a little.

Cheers!!!!

[One of Many]

Depends on what you are using. Have you looked into face grooving inserts and holders?

Personally I would grind my own carbide bit if it were a small run, but having the holder system sure is a blessing if they are reliable that thin.

Sandvik options

DC

[big_mak]

iscar picco tools may do the trick

[tobyaxis]

Originally Posted by big_mak iscar picco tools may do the trick

http://www.iscar.com/ProductUpdate/P...MenuItemID3=14

[eject_21]

can we see your code? when does it break? feed? speed? make sure your on center and the insert is correct for that diameter.I had a problem once when the tool made a series of rough pecks, then went to semi-finish without retracting enough in Z. Watch the tool run and see where its breaking.In 304 ss I would be at 280 sfpm, f.001 for the initial rough pecks. S320 f.002 for finishing.My guess is your tools off-center.

[tobyaxis]

I forgot to add that End Mills with a few Flute ground off work great for Trepanning. Sorry this was missed, been on a Mill for a while.

Some times I wish our brains where like Hard Drives that could be Searched LOL.