MTGNR/L Series: Heavy-Duty M-Type Multi-Lock OD Turning Tool Holder for TNMG Inserts (91° Approach Angle)

Technical Analysis: The MTGNR/L Configuration

The MTGNR/L is defined by its geometry, optimized for stability and cost-efficiency. As a dedicated TNMG tool holder, it leverages the strength of negative triangular inserts.

Key Performance Benefits

• Superior Clamping Force: The M-Type design is specifically built to handle high-torque operations, reducing harmonics and chatter that can lead to premature insert failure.
• Precision 91° Geometry: The 1° lead angle ensures that while the tool turns a 90° shoulder, the side cutting edge does not rub against the workpiece, resulting in a cleaner surface finish and lower heat generation.
• Versatile OD Turning: Whether you are performing straight turning or facing toward the center, the MTGNR/L remains stable, making it a “workhorse” for general engineering.

• High Material Removal Rates (MRR): Designed to withstand the forces of high-feed roughing, this TNMG tool holder excels in bulk material removal.

Frequently Asked Questions (FAQs)

Q: What is the difference between MTGNR and MTFNR holders?
A: Both feature a 91° approach angle. However, the G-style (MTGNR) is typically designed for a specific orientation that makes it slightly more versatile for both longitudinal turning and facing in certain turret setups compared to the F-style.

Q: Why should I use an OD turning tool holder with an M-Type clamp instead of a P-Type?
A: P-Type holders use only a hole-pulling pin. While effective, the M-Type (Multi-Lock) adds a top clamp. This extra downward pressure is critical for heavy roughing or when machining materials that cause high vibration, as it keeps the insert perfectly seated.

Q: Which inserts fit this TNMG tool holder?
A: It is compatible with all standard ISO TNMG inserts (e.g., TNMG 160408). Ensure the size code of the holder (e.g., 16, 22) matches the first two digits of your TNMG insert size.

Q: Can I use this for finishing cuts?
A: Yes. While the MTGNR/L is excellent for roughing due to its rigidity, it can be used for finishing when paired with a finishing-geometry TNMG insert (like a -PF or -SF chipbreaker) and a smaller nose radius.