D (Clamping System): Represents a highly rigid Double-Clamp system (Top clamp over the insert hole combined with a pulling lever/pin). This system provides maximum stability against axial and radial forces during heavy cuts.
C (Insert Shape): Engineered specifically to fit 80° rhombic (diamond-shaped) inserts.
L (Holder Style): Indicates a 95° approach angle (entering angle). It allows for both longitudinal turning and facing operations.
N (Clearance Angle): Optimized for 0° negative clearance inserts, meaning you can use double-sided inserts (such as standard CNMG) to double your available cutting edges.
L (Hand of Tool): Designates a Left-Hand cutting orientation. The spindle must rotate clockwise (M04) if mounted standard, or it is used on the backside of a CNC turret.
2525 (Shank Dimensions): A square metric shank measuring 25 mm width × 25 mm height.
M (Tool Length): Standard total functional length code indicating exactly 150 mm overall length.
12 (Insert Seat Size): Built to hold an insert with a 12 mm cutting edge length (Inscribed Circle of 12.7 mm / 1/2").
Compatible Target Inserts
This toolholder is globally standardized to carry CNMG 12 04... profile inserts (e.g., CNMG 120408 or CNMG 120412). It can also accept specialized geometries like CNMM or CNMX 1207 variants depending on the specific shim installed.
Standard Spare Parts Setup
For a standard DCLNL 2525 M12 block, the core replacement hardware kit includes:
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