ARMOUR TOOLING – 4mm Tungsten Carbide End mill - 4 Flute Sharp Corner Cutter – CNC Milling Tool – Twin pack - for Alloy Steels- High Performance Milling Cutter - Roughing And Finishing

I bought this end mill for counterboring pockets in 6Al4V titanium, which means it had to be *sharp*! It not only cut through the ti smoothly amd concentrically, it left a perfect surface finish with zero chatter.I bought the Armour end mill off the back of buying their countersink set, which are also very impressive and cs both ti and annealed steel beautifully.

Surprisingly good for the money, I have been using these with my mini mill for cutting precision slots in various metals. They have been surprisingly durable.

Very good end mill, price is good, worked well, good amount of sizes

Does a fine job of milling steel. Could be a bit longer though. Good quality item

Used this cutter horizontally in my lathe as I don't have a mill, held via a collet chuck. I wasn't expecting it to go smoothly but wow, this cutter is amazingly sharp, and stayed sharp. The workpiece is cast iron with an aluminium alloy extension and the cutter was like a hot knife through butter. After the job, examining the cutter there was zero wear, zero marks, I could hardly tell it'd been used.

As you can see in the photo,I cut 8 slots in 1/2 steel blocks 1/4 of an inch depth a total of 16 times using only one of the 3mm carbide cutters from armour tooling,and I really gave this cutter a work out and to my surprise it’s still sharp.I was so impressed I purchased a 6 8 10 and 12 mm cutters I just wish armour tooling offered larger cutters as I would have no hesitation in purchasing them .in the past I have bought more expensive milling cutters and after a few cuts they ended up in the bin . Just wish I could have found these carbide cutters sooner .so keep up the good work Armour tooling .

These small end mills are quite good compared to others I have used. Maintained a decent cutting edge through steel which had blunted others

Highly recommend this cutter