1.7mm Metric Ball End Mill

The 1.7mm ball nose is perfect for cleaning up small fillets in my aluminum parts, and the cutting edge held up well through several passes without chipping.

I almost returned this thinking it was too small for what I needed, but the 1.7mm ball profile is working perfectly for detailed cavity work. The flutes are sharp right out of the pack, and the rounded cutting edge leaves a much smoother finish than my old flat end mills.

Just drilled a 0.5mm deep pocket in brass with this 1.7mm ball end mill and the finish is glass-smooth. It holds up beautifully at 12,000 RPM without any chatter.