RUKO 21mm diameter high precision HSS-G core drill bit.

The Ruko-128021-HSS-G (Ø 21 mm) hole saw is a high-precision tool designed for drilling in a wide variety of materials. With a material thickness of up to 2.5 mm and a cutting depth of 5.0 mm, this hole saw is ideal for working with alloy steels, cast steel, non-ferrous metals, light metals, plastics, reinforced fabrics, drywall, and light construction materials. Its right-hand cutting design and resharpenable design ensure long-lasting and efficient performance with every use.

It is important to note that this tool is not suitable for hammer drilling. It is recommended to apply light pressure when starting to drill, maintaining constant pressure and avoiding oscillating movements for optimal results.

• Diameter: Ø 21 mm
• Material thickness: up to 2.5 mm
• Cutting depth: 5.0 mm
• Right-hand cutting
• Resharpenable
• Recommended for alloy steels (up to 800 N/mm² hardness)
• Compatible with cast steel and non-ferrous metals
• Ideal for plastics and reinforced fabrics
• Not suitable for hammer drilling
• Use of coolant recommended