The Venom Diamond Incremental Milling & Cutting CNC Bits (Reverse M12 Thread) are engineered specifically for reverse-rotation CNC saws and 5-axis machines, where standard M12 bits cannot be used. Designed for quartzite, granite, and quartz, these bits deliver smooth incremental milling, clean tracking, and exceptional life even on today’s hardest stones.

Reverse-thread incremental bits are required on machines where spindle rotation would loosen a standard bit. Venom reverse-thread tooling stays tight, safe, and stable under load.

Compatible With — Reverse M12 Thread Machines

These bits fit all CNC saws and 5-axis systems that require reverse M12 threaded diamond tooling, including:

• Sasso K-600

• Sasso K-600 Extreme

• Sasso 700 / 800 series (reverse thread spindles)

• Donatoni Jet 625

• Donatoni Jet / Jet Plus 5-axis saws

• Park Industries SABER & SABERjet (reverse-rotation models)

• GMM 5-Axis CNC saws requiring reverse M12 tooling

• Brembana 5-axis CNC saws

• CMS 5-axis CNC saws

• Intermac 5-axis CNC saws with reverse-thread requirements

• Any CNC saw or 5-axis spindle that specifies reverse M12 thread for incremental bits

Applications

• Incremental sink cut-outs

• Inside radius milling on CNC saws

• Pocketing & roughing before polishing

• Inside corner cleanup & radius refinement

• Smooth multi-pass cutting with tight dimensional accuracy

Technical Specifications

• Thread Type: Reverse M12

• Dimensions: 2 inch Length × 3/4 inch Diameter (2" × 0.75")

• Stone Types: Quartzite, Granite, Quartz (Engineered Stone)

• Use: Wet only

• Recommended RPM: 4,500–5,000 (machine dependent)

• Tool Type: CNC Incremental Milling & Cutting Bit

Performance Features

• Reverse M12 thread prevents unthreading during reverse spindle rotation

• Long diamond height delivers extended life

• Bond optimized for hard quartzite, also ideal for granite & quartz

• Smooth tracking for precise incremental passes

• Built for high-duty CNC saw environments

Shop Tips

• Always run with consistent water flow

• Use light incremental passes for longest life and best accuracy

• Verify that your machine requires Reverse M12 thread before ordering

Adapter sold here.

For the Regular thread click here