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BEYOND MCMNN External Turning Toolholders
The BEYOND MCMNN toolholder series is designed for external turning applications using CNMG carbide inserts. Featuring the M-type clamp + lock pin system, these holders provide high rigidity and stable cutting performance. The third letter M in the ISO code represents either a 50° acute angle (80 type) or 40° obtuse angle (100 type), depending on the model suffix.
Main Features
- M-type clamping (Clamp + Lock Pin)
- Compatible Inserts: CNMG + last two digits
-
Approach angle:
- 50° (acute) → “-80” models
- 40° (obtuse) → “-100” models
- High-rigidity square shank – 16mm to 40mm options
- Right-hand cutting (letter N in 5th position = Neutral/Right)
- Ideal for steel, stainless steel & alloy turning
ISO Code Breakdown (MCMNN Example)
| Position | Description | Value |
|---|---|---|
| 1st Letter | Clamping Method | M – Clamp + Lock Pin |
| 2nd Letter | Insert Shape | C – 80° diamond |
| 3rd Letter | Approach Angle | M – 40° / 50° |
| 4th Letter | Relief Angle | N – 0° |
| 5th Letter | Hand of Tool | N – Neutral/Right |
| 6–9th | Shank Height × Width | 16×16 / 20×20 / 25×25 / 32×32 / 40×40 |
| Letter After Digits | Toolholder Length | H=100mm, K=125mm, M=150mm, P=170mm, R=200mm |
| Final Digits | Insert Size | 12 or 16 or 19 (CNMG1204/1606/1906) |
Compatible Inserts
All models use CNMG inserts, determined by the last two digits of the model:
- “12” → CNMG12
- “16” → CNMG16
- “19” → CNMG19
Available Models & Specifications
| Model | Shank Size (mm) | Length Code | Toolholder Length (mm) | Insert Size | Approach Angle | Notes |
|---|---|---|---|---|---|---|
| MCMNN1616H12-80 | 16 × 16 | H | 100 | CNMG12 | 50° | Acute |
| MCMNN2020K12-80 | 20 × 20 | K | 125 | CNMG12 | 50° | Acute |
| MCMNN2525M12-80 | 25 × 25 | M | 150 | CNMG12 | 50° | Acute |
| MCMNN3232P12-80 | 32 × 32 | P | 170 | CNMG12 | 50° | Acute |
| MCMNN1616H12-100 | 16 × 16 | H | 100 | CNMG12 | 40° | Obtuse |
| MCMNN2020K12-100 | 20 × 20 | K | 125 | CNMG12 | 40° | Obtuse |
| MCMNN2525M12-100 | 25 × 25 | M | 150 | CNMG12 | 40° | Obtuse |
| MCMNN3232P12-100 | 32 × 32 | P | 170 | CNMG12 | 40° | Obtuse |
| MCMNN3232P16 | 32 × 32 | P | 170 | CNMG16 | 50° | Standard |
| MCMNN4040R16 | 40 × 40 | R | 200 | CNMG16 | 50° | Heavy Duty |
| MCMNN2525M16-80 | 25 × 25 | M | 150 | CNMG16 | 50° | Acute |
| MCMNN3232P16-80 | 32 × 32 | P | 170 | CNMG16 | 50° | Acute |
| MCMNN2525M16-100 | 25 × 25 | M | 150 | CNMG16 | 40° | Obtuse |
| MCMNN3232P16-100 | 32 × 32 | P | 170 | CNMG16 | 40° | Obtuse |
| MCMNN3232P19-80 | 32 × 32 | P | 170 | CNMG19 | 50° | Acute |
| MCMNN3232P19-100 | 32 × 32 | P | 170 | CNMG19 | 40° | Obtuse |
Applications
- External turning and profiling
- Medium cutting and roughing
- High-rigidity CNC turning
- Steel, stainless steel, cast iron
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