GRAPHITE 57H919 is a bi-metal hole saw with a 140 mm cutting diameter supplied as a single unit. It is designed to cut circular openings in steel, stainless steel, wood, plastics and composite materials, using progressive teeth made of high speed steel to maintain edge life and provide efficient cutting for construction, metalworking and installation tasks.
Advantages
The bimetal construction combines flexibility and toughness, while progressive high-speed steel teeth give smoother penetration and longer service life compared with standard tooth geometries. A 140 mm diameter enables cutting of large holes in sheet metal and other materials with reduced need for pilot drilling when used with appropriate arbors and drill machines.
Suitable for
- Creating circular openings in steel and stainless steel sheets
- Drilling holes in wood and wood-based panels
- Cutting through plastics and composite panels
- On-site installation work where large-diameter holes are required
Когда может не подойти
Этот пильный коронка не оптимальна для сверления очень толстых монолитных блоков без предварительной подготовки или для работ, требующих предельно малой шероховатости кромки отверстия без последующей обработки. Для тонких, хрупких материалов или для сверления крайне точных малых отверстий лучше использовать специализированные сверла.
Key specifications
- Cutting diameter: 140 mm
- Material: bimetal body with high-speed steel (HSS) progressive teeth
- Main compatible materials: steel, stainless steel, wood, plastics, composites
- Supply: 1 piece per package
How to use
Install the hole saw on a compatible arbor and secure it to a drill with sufficient power and speed control. Mark the center of the intended hole and, if needed, use a pilot drill to guide the saw. Start drilling at low speed to establish the cut, then increase speed and apply steady, even pressure. Periodically withdraw the saw to clear chips and avoid overheating; use cutting lubricant when working with metals. After completing the cut, deburr the hole edges if required.
What to consider before purchase
- Confirm the 140 mm diameter matches the required hole size for your project
- Ensure your drill and arbor support the hole saw diameter and provide adequate power and torque
- Consider the primary materials you will cut (steel, stainless, wood, plastics) to verify suitability
Usage recommendations
For metal work, use a suitable cutting lubricant, moderate speed and steady pressure; for wood and plastics, higher speeds and chip clearance improve cutting efficiency. Regularly inspect teeth for wear and replace the hole saw when cutting quality declines.
