MCLNR2525M12 External Turning Tool Holder

Decoding the code (ISO 5608/5610)

• M — Insert clamping method: top-clamp + hole clamping (clamp with a locating pin/screw).

• C — Insert shape: 80° rhombic (C-shape, e.g., CN**).

• L — Holder style: offset shank, κr = 95° approach for side/end cutting.

• N — Insert clearance: 0° (negative rake insert).

• R — Hand of tool: Right-hand.

• 25 25 — Shank height 25 mm × width 25 mm.

• M — Length code: 150 mm overall length (ISO length letter “M”).

• 12 — Insert size for C-shape: 12 mm cutting-edge length (matches CN** “12..” size).

Compatible inserts (size “12”)

• CNMG 12 04 / 12 08, CNGG 12…, CNMA/CNMM 12… (any C-shape, N clearance, size 12 family). The exact thickness/radius depend on your job (e.g., 1204 = 4 mm thick; 120408 = 0.8 mm nose).

  Key specs (typical)

• Approach (lead) angle: 95° (style L).

• Clamping: Top clamp + pin (robust for negative inserts).

• Shank: 25×25 mm, length ≈150 mm.

• Hand: Right.

Materials (holder body)

• Your version: HSS (High-Speed Steel).

• Common industry options: alloy steels (e.g., 40Cr / 42CrMo), sometimes hardened tool steel. (General industry info.)

Notes for use

• Designed for negative CN inserts—good edge strength and stability for medium to roughing cuts.

• Choose chipbreaker and grade by material (steel, SS, cast iron, superalloys) and by operation (finishing vs roughing).