SPEED TIGER Chamfer End Mill - CNC Carving Bits, V Groove, 60 Degree, ICSM1/4 Shank 2" OVL (1 Piece, 1/4" 60°) - for Wood, Alloy Steels, Hardened Steels – Mill Bits Sets for DIYers & Professionals

was able to carve my trademark logo into c360 brass- logo size 1.25" x 1.25", rpm = 18,000, at .02 depth at 15 ipm. - no cooling or lube used and the tip remained clean in aluminum & brass! so far engraved logo over 2 dozen times in brass- still as sharp as day 1! love the bit!

Still working on the depth but this bit milled off the copper very cleanly as compared to the v-bits that came with my CNC.

Looks good but running some chamfers on CNC broke on second part milling aluminum and right outside the return window. Will contact about replacement and update.

Of course, you must keep the bit cool. I use this bit to edge knives that I build. Perfect for 1/4" material.

The first chamfer pass (conventional milling) went perfectly fine, at 0.040 depth of cut into 1018 mild steel for 3 inches. With cooling mist. It went smoothly and left a beautiful finish.I then backed up and dialed in 0.020 for the second conventional pass -- and the bit shattered as it entered the material.$40 down the drain. I've just placed an order for the $60-ish (ouch!) Niagara cutter of the same specs, hoping that the Niagara brand will be of higher quality. This Speed Tiger looked good and was very sharp, but seems overly brittle.Update: I'd also ordered the SPEED TIGER 3/8 inch 90 degree chamfer at the same time as the 1/2 inch 60 degree chamfer. I used the 3/8 chamfer yesterday for the first time. Due to my breakage experience with the 1/2 inch chamfer, I was extra super careful with the 3/8 chamfer, really "babying" it through a light chamfer (conventional milling) of 1018 mild steel again, and again with cooling mist. It too suddenly shattered within 3 inches. It was cutting beautifully with no indication of distress, then BOOM. Another $25 wasted. :-/Update #2: I wrote earlier that, after my 60 degree Speed Tiger chamfer mill broke, I bit the bullet and ordered a the more expensive Niagara item. I had the opportunity to use that last night and it cut very well, without issue. And it was into much harder 4140 steel.Update #3: A representative from Speed Tiger reached out to me to "make it right". After I provided all of my milling details (machine type, speeds&feeds, depth of cut, etc.) they recommended that I bump up the RPM to more than double what I'd been using (1500RPM suggested vs 800RPM originally used). AND they're sending free replacement bits for me to try again. This is fabulous service, so I'm bumping up my rating from 2 stars to 4. And I'll plan on updating this again (hopefully to 5 stars) once I can re-test the cutters at the higher speed.

Crashed this baby into my table first try. Still cut just fine! Do with that information as you will. But! It worked perfect for engraving 1-2mm letters into aluminum and acrylic at 10000rpm 300 feed rate

very nice cutter, use as a chamfer and engraving tool in a VF4 Haas in 1018, or aluminumI bought other Speed Tiger items, and they are equally nice.

The only way this tool could have failed faster is if I had used it sooner... I bought this ahead of time for a project and finally got around to using it today, and it failed/chipped out immediately. And because I didn't touch the tool for over a month, I'm also out of the return window.This was mounted in a mill using a collet to try and chamfer some annealed O1 Tool steel and it failed IMMEDIATELY.