Ravne - Saw Blades for Metal Industry
HSS Saws: general use conventional cut-off blade for ferrous and non ferrous metals, also suitable for specific plastics. Hot Saw Blades are used to cut metals with a temperature in excess of 850˚C. Friction Saw Blades are used to saw metals with a temperature below 250˚C.
RAVNE hot and friction saw blades are used for cutting: slabs - billets – rounds - squares - plates - tubes – rails – profiles up to 950˚C.
Both sawing methods are a friction cutting. The friction heat in the cutting gap produces temperatures which bring the material in a soft, almost plastic condition. In order to clear debris from the tooth gullet a copious or heavy flow of coolant (preferably under high pressure) is essential for efficient cutting.
Blade Body Designs:
- Black rolled
- Face ground
- Taper ground
The tooth geometry and tooth pitch are determined by the section and quality (analysis) of the material to be cut and the sawing machine.
- HSS Saws: Diameter: 100mm to 500mm (4 to 20 inches)
- Thickness: 1mm to 4mm (0.04 to 0.16 inches)
- Small Diameter Friction Saws: Diameter: 350mm to 1200mm (14 to 47 inches)
- Large Hot Saws and Large Friction Saws: Diameter 1000mm to 2400mm (39 to 94 inches)
- Thickness 6mm to 16mm thick (0.236 to 0.63 inches)
- HSS Saws: Standard High Speed Steel (HSS) or Special HSS alloyed with Cobalt.
- Standard Surface Finish is steam treated oxide. Special coatings are used for low frictional properties enables faster cutting speed: Titanium Nitride (TiN), Titanium Aluminium Nitride (TiAlN), Titanium Carbon Nitride (TiCN) or Hard Chrome.
- Small Diameter Friction Saws: Chrome Vanadium Steel or Tungsten Molybdenum Steel usually over 600mm (24 inches)
- Large Hot Saws and Large Friction Saws: Carbon, Manganese Steel, normalised body 22 HRC with flame hardened teeth 42 to 46 HRC. Tough crack resistant blade body combined with hard wear resistant teeth, to provide considerably increased blade life between sharpens compared to medium carbon manganese steel blades.