DESCRIPTION

Product Overview

The TNMG160408L-VF CD8125 is a high-precision, double-sided 60° triangular negative turning insert tailored for high-efficiency finishing of ISO P-Class materials (Carbon Steels, Alloy Steels, Tool Steels, and Structural Steels). This left-hand insert integrates the ultra-sharp -VF finishing chipbreaker with the highly versatile CD8125 (P25) grade matrix. It is engineered to solve the most frustrating challenges in steel finishing: chip bird-nesting, dimensional variations due to high cutting heat, and poor surface roughness. It is an exceptional choice for automotive components, precision shafts, and mass-production CNC turning lines.

2. Technical Specifications

• ISO Code: TNMG160408L-VF (ANSI: TNMG332L-VF)

• Grade: CD8125 (Premium CVD multi-layer coating, optimized for ISO P20–P30 steel finishing and medium turning)

• Shape: T-Shape (60° Triangle)

• Cutting Direction: Left-Hand (L)

• Relief Angle: N-Type (0° Negative rake, double-sided with 6 usable cutting edges for outstanding economy)

• Nose Radius: 0.8 mm (R0.8 / 1/32") – Provides a robust cutting edge that balances high surface finish quality with great wear resistance.

• Chipbreaker: -VF (Finishing Geometry with a positive rake angle and tight chip groove for excellent chip breaking at low depths of cut)

• Application Range: Low carbon steel, medium/high carbon steel, alloy steel (e.g., 4140, 4340), die/mold steel, and forged steels.

Typical Applications

• Shaft & Axle Manufacturing: Precision continuous finish turning of automotive drive shafts, electric motor rotors, and long stepped axles.

• Fastener & Component Production: High-volume CNC machining of high-tensile steel bolts, hydraulic fittings, and steel flanges.

• General Engineering: Finish-turning profiles, shoulders, and external faces on pre-heat-treated structural and alloy steel parts.

CNC Inserts - Frequently Asked Questions

1. How do I choose the right grade for my specific machining application?

Choosing the correct grade is crucial for tool life and performance. We provide a comprehensive Grade Cross-Reference Chart that maps our CD Carbide grades to major international brands like Sandvik, Mitsubishi, and Kyocera. If you are unsure, simply provide us with the workpiece material (P, M, K, S, H) and machining conditions, and our engineers will recommend the best solution.

2. Can you provide customized CNC tools based on our drawings?

Yes. As a factory-direct manufacturer, we specialize in bespoke engineering. Whether you need non-standard dimensions, specific chipbreakers, or customized coatings for unique alloys, our technical team can develop products based on your technical drawings (PDF/STEP) or physical samples.

3. Do you offer free samples for testing before bulk orders?

We understand that "trial cutting" is the only way to verify tool stability. We offer sample packs for professional buyers to test performance on their own CNC machines. Please contact our sales team with your machine specifications and the material you are processing to request your trial samples.

4. How do you ensure the quality consistency of your carbide inserts?

Our quality control is integrated into every step of the production process in Zhuzhou. We use high-purity tungsten carbide powder and advanced PVD/CVD coating equipment. Each batch undergoes rigorous inspection, including microscopic edge analysis and hardness testing, to ensure that the performance of the 1,000th insert is identical to the 1st.

5. What is the typical lead time for international B2B orders?

For standard models in stock (such as WNMG, CNMG, etc.), we usually ship within 3-5 business days. For customized tools or large-volume OEM orders, the production cycle typically ranges from 2 to 4 weeks, depending on the complexity of the design and coating requirements.

6. Are you a manufacturer or a trading company?

We are a direct manufacturing enterprise based in Zhuzhou, the hunan of China’s tungsten carbide industry. By cutting out the middleman, we provide factory-direct pricing and faster technical support. This allows us to offer more flexible MOQs (Minimum Order Quantities) for small-to-medium-sized distributors and specialized machine shops.