Product description Technical information:. Blade angles: 10 / 30,Material: spring steel, high alloy QSX48 ground / special saw surface treatment. Tooth design: fully ground. Tooth development: dependent on the thickness of the supporting part and the grade of woodHardness of bearing part: 45 - 47 HRCTooth hardness: up to 64 HRCConditions of use:. Saw tension: according to machine manufacturer's DTR. Cooling: as recommended in the DTR of the machine manufacturerPropulsion: depending on diameter, wood species and motor powerCutting speed: about 30 m/sSaw operating time: up to 4 hours.