SRO 021H21: Manufacturer custom design or batch assembly profile code.
C20: Straight cylindrical adaptation shank featuring a 20 mm outer diameter, intended for secure mounting inside a collet chuck, hydraulic holder, or side-lock adapter.
120L: Maximum overall component tool length of 120 mm.
1T: Number of effective insert pockets/teeth (1 Tooth/Single flute design).
55L: Reach or effective neck clearance depth standard measuring 55 mm long, used to clear sidewalls during deep-pocket milling.
BCH 22: Core interface module or design pocket descriptor (typically indicates compatibility with specific metric modular heads or proprietary inserts, such as a 22 mm reference pilot, seat diameter, or matching indexable insert system)..