4NKT06R: Denotes the compatible insert standard. The pocket architecture is designed specifically for 4NKT 06 style double-sided, 4-corner indexable carbide inserts.
C20: Indicates a 20 mm straight cylindrical shank diameter, which fits into standard 20 mm collets (like ER32) or side-lock (Weldon) tool holders.
20: Represents the outer cutting diameter ( of 20 mm.
200: Specifies an extended overall tool length of 200 mm, making it perfect for deep-cavity reach where standard-length milling bars would experience tool holder collision.
3T: Indicates 3 Teeth (Flutes / Pockets). This 3-pocket arrangement on a 20 mm diameter tool provides a balanced chip pocket clearance, preventing chip packing during deep-slotting operations.
Because this milling bar features an extended length profile (200 mm) on a relatively narrow 20 mm shank, the length-to-diameter ratio is quite high (10:1). To prevent vibration, deflection, and tool chatter, observe the following parameters:
Factor
Operating & Rigidity Guidelines
Max Depth of Cut Limited by the insert size to a maximum of 5.0 mm per axial pass.
Deflection Strategy For deep slotting at full 200 mm extension, reduce the feed rate or consider a light rough-stepping routine.
Coolant Profile Utilize high-pressure internal through-coolant to violently flush chips up and out of deep cavities.
060304R-M inserts feature 4 helical cutting edges to lower tool cost per edge.
Available in high-performance grades like TT9080 for stainless steel/alloy steels, or TT8080 for tougher roughing tasks.