Iwaki, Japan – May, 2025 – Tungaloy Corporation (President: Satoshi Kinoshita, Head Office: Iwaki City, Fukushima Prefecture) announces the expansion of its TungBoreMini series, now offering a ø7 shank version optimized for small-diameter machining. This new addition enables flexible mounting on a variety of automatic lathes by being compatible with sleeves from the existing TinyMiniTurn series, enhancing versatility and productivity.
Challenges and Trends
In small-part machining, efficient drilling and turning operations are essential. However, conventional small-diameter solid carbide bars often suffer from inadequate chip evacuation, leading to machining troubles and defects. Additionally, the need to use separate tools for drilling and internal/external turning increases setup time and tool changes, becoming a barrier to improving productivity. As the demand for high-mix, low-volume production continues to grow, there is a need for tools that can address these challenges.
Product Overview
TungBoreMini is a multifunctional composite tool capable of performing both drilling and turning operations with a single tool. Its high-rigidity structure and excellent chip evacuation performance contribute to reduced machining time and significantly improved productivity. It supports a minimum machining diameter starting from ø8 mm.
Benefits and Features
Feature 1: Excellent Chip Control
- Indexable inserts with 3D chipbreakers efficiently break and evacuate chips
- Reduces the risk of machine stoppages and defects by minimizing chip-related issues, even in small-diameter machining
- Maintains a stable cutting environment, making it ideal for continuous operation on automatic lathe
Feature 2: Optimized Coolant Supply
- Internal coolant-compatible design ensures precise cooling and lubrication at the cutting edge
- Enhances chip evacuation and suppresses tool wear, contributing to longer tool life
- When combined with the TinyMiniTurn 4-port coolant sleeve, it further prevents chip entanglement and enhances machining stability
Feature 3: Expanded Compatibility with ø7 Shank for Automatic Lathes
- New ø7 shank supports minimum machining diameter of ø8
- Compatible with TinyMiniTurn sleeves, enabling easy integration with existing automatic lathe setups
- Increases tool replacement flexibility and accommodates a wider range of machining applications
Cutting Performance
Drilling
| Holder | TBM08RF12-2.25 |
| Insert | XCMT040102R-PS AH725 |
| Workpiece material | S45C / C45 |
| Cutting speed | Vc = 100 m/min |
| Application | Drilling |
| Coolant | Internal |
Internal turning
| Holder | TBM08RF12-2.25 |
| Insert | XCMT040102R-PS AH725 |
| Workpiece material | S45C / C45 |
| Cutting speed | Vc = 150 m/min |
| Application | Internal turning |
| Coolant | Internal |
Success Stories
IMPROVED PROCESS TIME
Traditionally, machining a Ø13 hole required three different tools—a leading drill, an Ø8 drill, and a boring tool.
By switching to the TungBoreMini, all operations were consolidated into a single tool, eliminating tool changes and helping to reduce the cycle time of the machining process.
| Industry | Engineering |
| Component | Machine Parts |
| Material ISO code |  P – Steel |
| Work material | S45C/C45 |
| Machine (spindle type) | Swiss Lathe |
| Tool family | Turning |
| Tool category | Internal turning |
| Product name | TungBoreMini |
| TSR No. | 5241T |
