A 6XD6X100L is an indexable code used to buy or manufacture a solid carbide end mill. Here is the exact definition of every component in that tool code:
1. 6X (Cutting Diameter)
Definition: The outer diameter (D) of the cutting teeth at the very tip of the tool.
Meaning: This tool will cut a slot or path that is exactly 6 mm wide in the metal.
2. D6 (Shank Diameter)
Definition: The diameter (d) of the smooth, rear cylindrical section of the tool.
Meaning: This is the part that slides into your machine's tool holder (like an ER11/ER20 collet chuck or side-lock holder). Since it is 6 mm, it matches the cutting tip, meaning it is a straight-shank tool.
3. 100L (Overall Length)
Definition: The total length (L) of the tool from the very top tip to the very bottom end of the shank.
Meaning: The tool is 100 mm long from end to end. A standard 6 mm end mill is usually only 50 mm long; therefore, "100L" categorizes this as an Extra-Long Series tool designed for deep-reach machining.