Kyocera S12M-STUPL09-16 Internal Boring Bar Turning Toolholder
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The Kyocera S12M-STUPL09-16 is a high-precision internal turning boring bar designed for reliable boring, profiling, and internal machining operations. Manufactured from high-strength alloy steel, this toolholder offers excellent rigidity and vibration resistance, ensuring stable cutting performance and improved surface finish when machining internal diameters on CNC and conventional lathes.
This boring bar features the STUPL holder configuration and is designed to securely clamp ISO size 09 triangular carbide inserts. The rigid 12 mm round shank provides excellent stability when installed in boring bar holders or tool sleeves, allowing consistent cutting accuracy and reduced chatter during internal turning operations. Its compact design enables efficient machining of smaller bore diameters while maintaining strong insert clamping for reliable cutting performance. Internal boring bars like this are widely used for precision internal machining due to their rigidity and chip evacuation performance.
Key Features & Benefits
- Precision internal boring bar for internal turning and profiling
- STUPL style holder designed for ISO size 09 inserts
- Rigid steel shank construction reduces vibration and chatter
- Compact head design allows access to smaller bore diameters
- Secure insert clamping for consistent cutting performance
- Suitable for CNC lathes and conventional turning machines
- Improves dimensional accuracy and surface finish in internal machining
- Designed for steel and general engineering material applications
Technical Specifications
- Brand: Kyocera
- Model: S12M-STUPL09-16
- Item Number: THC03420
- Product Type: Internal Turning Toolholder / Boring Bar
- Holder Style: STUPL
- Insert Size: 09
- Minimum Bore Diameter: 16 mm
- Shank Diameter: 12 mm
- Hand: Left Hand
- Material: Alloy Steel
- Application: Internal turning, boring, and profiling
Kyocera cutting tools are globally recognised for their advanced engineering and consistent machining performance. Their indexable turning toolholders and boring bars are designed to deliver excellent rigidity, reliable insert clamping, and superior chip evacuation for precision internal machining across a wide range of industrial applications.