MVVNN Neutral Tool Holder with 72.5° Angle for Profiling
- Tool Type: Neutral External Turning Tool Holder (Symmetric)
- Model Series: MVVNN (Neutral Hand)
- Entering Angle: 72.5° Entering Angle (Symmetric Clearance)
- Clamping System: M-Type Double Clamp (Pin & Top Clamp)
- Insert Compatibility: VNMG, VNMA, VNMM (35° Diamond Inserts)
-
Key Application: Profiling, relieving, and bi-directional turning.
Contact our sales team to discover all of your pricing options.
Overview
The MVVNN series is a specialized Neutral External Turning Tool Holder designed for versatility in CNC machining. Unlike Right or Left-hand tools, the MVVNN features a symmetric design with a 72.5° entering angle. This geometry makes it the perfect choice for profiling operations that require cutting in multiple directions or entering V-shaped reliefs without tool interference.
Optimized for VNMG Inserts
Engineered to seat the VNMG insert (35° Diamond), this holder maximizes access to the workpiece. The slender 35° insert combined with the neutral 72.5° angle allows the tool to perform complex contouring and undercutting. It is a staple tool for workshops running MVVNN 2525 M16 setups for intricate shaft work.
Rigid M-Type Stability
Neutral profiling often subjects the tool to varying radial and axial forces. The MVVNN utilizes the robust M-Type Double Clamping System. The lock pin and top clamp ensure the VNMG insert remains immovable, providing the stability needed for high-precision finishing even when the cutting direction changes.
ISO Code Naming Rules
Here is the breakdown of the MVVNN code, highlighting its unique Neutral V-style geometry:
| Position | Code | Parameter | Description & Technical Advantage |
| 1st | M | Clamping Method |
Multi-lock (Double Clamp): Uses pin & top clamp. • Benefit: Maximum rigidity for holding the 35° insert in a neutral position. |
| 2nd | V | Insert Shape |
35° Diamond: Fits VNMG inserts. • Benefit: Sharpest geometry for detailed profiling. |
| 3rd | V | Holder Style |
72.5° Entering Angle: • Benefit: Provides equal clearance on both sides of the insert, ideal for relief cutting. |
| 4th | N | Clearance Angle |
Negative (0°): Insert sits perpendicular. • Benefit: Double-sided economy (4 cutting edges on a VNMG insert). |
| 5th | N | Hand of Tool |
Neutral: Symmetric design. • Benefit: Can approach the part perpendicular to the axis; no “Right” or “Left” limitation. |
FAQ
Q1: What is the main advantage of a Neutral (MVVNN) holder?
A: A Neutral holder like the MVVNN is symmetric. It allows the tool to cut reliefs or profiles that require equal clearance on both sides of the cut. It eliminates the need to switch between a Left and Right hand tool for certain center-approach operations.
Q2: Why is the angle 72.5 degrees?
A: The 72.5° entering angle is the geometric result of positioning a 35° VNMG insert symmetrically in the holder. This angle provides ample clearance for the tool flank when plunging or contouring.
Q3: Is the MVVNN 2525 M16 suitable for heavy roughing?
A: No. The MVVNN is designed for profiling, finishing, and light cuts. The 35° insert tip is delicate. For heavy roughing, we recommend using a CNMG (MCLNR) or WNMG (MWLNR) holder.
Specifications
| MODEL | SIZE(MM) | INSERT | SHIM | CENTER PIN | WRENCH | PLATEN | DOUBLE SCREW | WRENCH | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| h | b | H | F | L | ||||||||
| MVVNN1616K16 | 16 | 16 | 16 | 8 | 125 | VN□□1604□□ | MV1603 | CTM513 | L2 | HL2413 | ML0625 | L3 |
| MVVNN2020K16 | 20 | 20 | 20 | 10 | 125 | VN□□1604□□ | ||||||
| MVVNN2525M16 | 25 | 25 | 25 | 12.5 | 150 | VN□□1604□□ | ||||||
| MVVNN3232P16 | 32 | 32 | 32 | 16 | 170 | VN□□1604□□ | ||||||
| MVVNN4040R16 | 40 | 40 | 40 | 20 | 200 | VN□□1604□□ |
Need a consultation? Contact us！
Contact our sales team to discover all of your pricing options
