I love it when goodies turn up in the post.
These are solid carbide end mills in 10mm, 8mm and 6mm diameters
The plain silver ones with the high helix are a 3 flute design with geometry specifically for aluminium. The flutes are also set so you can plunge cut down like a drill.
There are 2 Ball nosed 2 flute end mills. These are great for machining a pocket with a nice radius on the corner. The other two end mills are 4 flute and designed for machining steel and harder materials.
The darker colored coating on some of them is an Aluminum Titanium Nitride (ALTiN) coating. It's a very abrasion resistant coating which makes them ideal for harder steels like 4140
Using this CNC mill is changing my mindset around tooling as I work more with it. Previously I would have a selection of different sized cutters from about 3mm up to 20mm or more. Mainly for getting the inside corner radius I want on a particular part. With the CNC machine you can program whatever radius you want so that’s meant I’ve been doing most of my milling with 8mm and 10mm end mills. So now I'm collecting a variety of styles and geometries around these sizes that should be able to do most jobs I need.
Cheers