Pinnfräs 3mm diameter
End mill with one “flute”
Diameter of shaft: 3.175mm × 7mm (can be used on a 3mm chuck)
Diameter of cut: 3.175mm
Cutting Length: 6mm Total Length: 50mm
Perfect for machining in aluminum, copper and other softer metals.
Straight flutes are perfect for MDF and wood. When using straight flutes, you dont lift the workpiece away from the table, which can cause vibration that causes the end mill to snap. You also get minimal dust formation with straight flutes.
The number of flutes depends on what you cut in. For example, when you cut in Aluminum, you want bigger Chips because it is a soft metal. A 4-flute end mill tends to not have enough space between the flutes to allow the material to evacuate, so that they stick to the end mill and it stops working well. In this case, a 1-2 flute pin mill would be better.
A 4 (or more) flute end mill has multiple cutting surfaces at each rotation, giving a finer surface at the same speed as a 2-flute milling cutter, so you have a lower-speed friction spindle.
Receipt for cutting in aluminum:
We can cut deep and fast in aluminum since we are used to it, but it takes a while to learn, start slowly and do like this.
Use a 3.17mm “One flute” endmill with 6-12mm cutting area (choose 6mm cutting area if you are cuting thin aluminum under 6mm, they are more stable)
1.Put the spindle on 11-13000 rpm (200-220Hz)
2.Run the machine at a speed of 500mm / min
3.Set the depth to 0.5mm per revolution
Also spray with lubricant occasionally. Blow away any pieces and shavings with a compressor so that they do not get caught between the work pieces and end mill. If it sounds bad, then aluminum has got stuck on the end mill, blow it off or lubricate while cutting.
After a while you can increase the depth to 1mm (for 3,17mm end mill) but have the same speed on the spindle and machine.
one endmill will last for a whole Raw machine 16 pieces 8-4mm aluminum, if your settings are good.