Iwaki, Japan – May, 2026 – Tungaloy Corporation (President: Satoshi Kinoshita, Head Office: Iwaki City, Fukushima Prefecture) announces the expansion of its TetraMini-Cut series with new high-precision CBN inserts featuring an insert width tolerance of ±0.01 mm, ensuring exceptional dimensional stability and superior surface finish for grooving hardened steel components.
Challenges and Trends
In automotive and machinery components, hardened steel is widely used to ensure wear resistance and strength, and the required precision for grooving operations on these parts has been increasing year by year. However, conventional CBN inserts for grooving offer a cutting width accuracy of only about ±0.02–0.05 mm, resulting in challenges such as dimensional variation and inconsistent surface finish quality. As a result, users who require high-precision machining often face the need for secondary corrections or additional processing, which increases the burden in terms of production efficiency and cost. In the market, there is a strong demand for new solutions that can overcome these challenges and achieve stable dimensional accuracy and high-quality surface finishes.
Benefits and Features
Feature 1: High-Precision Grooving with ±0.01 mm Width Tolerance
- The high-precision design with a ±0.01 mm width tolerance ensures stable groove dimensional accuracy.
- Minimizes variation between products and improves reproducibility of finishing accuracy.
- Ideal for precision component machining that requires highly accurate grooving.
Feature 2: Stable Machining with High-Rigidity TetraMini-Cut Structure
- The unique clamping structure enhances insert holding rigidity.
- Suppresses chatter and dimensional fluctuation during cutting, ensuring consistent machining quality.
- Delivers high reliability even with small tools, supporting long-term continuous operation.
Feature 3: Excellent Wear and Chipping Resistance with BX360 Grade
- Adopts CBN grade BX360, optimized for grooving hardened steel.
- Achieves long tool life even on high-hardness materials, reducing tool change frequency.
- Maintains stable surface quality through a well-balanced combination of wear and chipping resistance.
Feature 4: Custom-Order Inserts with Special Widths
- In addition to the standard lineup, custom-width inserts are available on request.
- Flexibly accommodates diverse machining requirements and provides optimal groove shapes.
- Contributes to improved productivity and process optimization for users.
