Iwaki, Japan – January, 2026 – Tungaloy Corporation (President: Satoshi Kinoshita, Head Office: Iwaki City, Fukushima Prefecture) announces the expansion of its face milling cutter series—DoTriple-Mill, DoPent, and DoOcto—now featuring oil-hole–less cutter bodies in diameters from ø80 mm to 4 inches, achieving simplified design, cost efficiency, and superior anti-chatter performance.
Challenges and Trends
In a wide range of industries such as general machining, mold and die, automotive, construction machinery, and heavy electrical equipment, optimizing machining efficiency and cost balance is a constant demand. In particular, in machining environments where through-center coolant is not used, customers have had no choice but to select cutter bodies with coolant holes, which has resulted in unnecessary cost burdens. The same situation has been observed for major sizes such as ø80, ø100, ø125, and 4 inches, and users have increasingly called for simpler and more economical options.
To meet these market needs, Tungaloy has expanded its lineup of cutter bodies without coolant holes, enabling users to select the most suitable products for their specific applications.
Product Overview
DoTriple-Mill, DoPent, and DoOcto are Tungaloy’s main face milling series.
【DoTriple-Mill】
Highly versatile cutter that can mount three types of inserts—square, octagonal, and round—into the same pocket, enabling multiple operations with a single cutter body.
【DoPent】
Face milling cutter featuring double-sided pentagonal inserts with 10 cutting edges, delivering low cutting forces, cost efficiency, and high-productivity face milling for a wide range of materials.
【DoOcto】
Optimized for cost-effective steel and cast iron machining, offering 8- and 16-corner inserts and a wide cutter body range for highly efficient, long tool-life roughing operations.
Benefits and Features
Feature 1: Cost Reduction with Non-Through-Coolant Body
- Eliminates the need for coolant holes, reducing manufacturing costs
- Simple structure enhances ease of maintenance
- Excellent cost-performance makes it ideal for mass production machining
Feature 2: High Anti-Vibration Performance with Unequal Pitch Design
- Cutter body employs the same unequal pitch design as existing models
- Suppresses vibration during cutting to achieve stable surface quality
- Reduces chatter to extend tool life
Feature 3: Expanded Lineup of Sizes
- Newly added sizes: ø80, ø100, ø125, and 4 inches
- Compatible with a wide range of machine tools and cutting conditions
- Enables easy selection of the optimal cutter for each application, improving production efficiency
