When a standard end mill cannot provide the diameter, reach, profile, tolerance, or clearance your part requires, a custom tool may be the better option.
A slot may start cleanly, then chips begin packing around the cutter. The spindle sound changes, chatter appears on the walls, or the finished slot
A standard end mill may machine the upper section of a pocket without difficulty. As the cut moves deeper, however, the holder approaches the wall,
A 10 mm end mill may cut cleanly at a short reach, then start leaving tapered walls or chatter marks when the same tool is
The part is in tolerance, but the wall still shows vertical lines. The floor has visible cutter marks. A 3D surface looks wavy under the
A 2-flute, 3-flute and 4-flute end mill of the same diameter can behave very differently in the same cut. Flute count changes three important things:
You stop the machine and find silver aluminum packed around the cutting edge or welded into the flutes. Machinists often call this aluminum chip welding,
End mills rarely go from sharp to broken without warning. The cutting edge usually develops a recognizable wear pattern first. Learning to distinguish normal wear
A carbide end mill rarely breaks for just one reason. Excessive cutting load, chip packing, deflection, runout and accumulated wear often interact until the carbide
