Overview
The SG Flat Drill SGEZ is a versatile large-diameter flat drill from NACHI's flat series, designed for high cost performance and durability. It features high alloy HSS and SG-coating for superior chipping resistance and longer tool life. The drill's rigid and well-balanced flute geometry ensures good chip ejection and accurate drilling.

Specifications
- High alloy HSS for cost efficiency.
- SG-coating for enhanced wear resistance.
- Balanced flute geometry for precision.
- Available in various diameters from 16mm to 50mm.

Cutting Conditions
For a 50mm tool diameter:
- Cutting speed: 25m/min
- Feed: 80mm/min (0.5mm/rev)
- Work material: S50C (180HB)
- Cutting fluid: Water-soluble
For a 20mm tool diameter:
- Cutting speed: 25m/min
- Feed: 80mm/min (0.2mm/rev)
- Work material: S50C
- Cutting fluid: Water-soluble

Performance Comparison
The SGEZ drill shows superior wear resistance compared to competitor end mills after drilling 216 holes. It is suitable for various materials including cast irons, stainless steels, and titanium alloys.

Recommendations
- Adjust drilling conditions based on machine rigidity and work clamp states.
- Use water-soluble cutting fluid and ensure sufficient supply to the cutting point.
- Suitable for drilling depths of 1D or less.
- Implement step feed if chips grow excessively.

Warnings
- Cover the work area to prevent chip scattering.
- Pre-drill if using machines with low stiffness.

Contact Information
For further assistance, contact NACHI's sales offices or authorized dealers.