Catalogo ABC 54

F 7 Our bimetal band saw blades have a backing in special spring steel, electronically welded to the blade in HSS, with 8% cobalt and 10% molybdenum (M42 with hardness of about 67-69 HRc). They are particularly useful for cutting solids, profiles, square tubes and pipes on portable cutting off machines, manual band saws, semi-automatic saws and semi-automatic saws for production. It is important to choose a blade with the ideal tooth profile and to know the type of material to be cut. Solid with diameter/thickness Variable pitch Even pitch Up to 20 mm 10/14 teeth Up to 10 mm 14 teeth 15 - 30 mm 8/12 teeth 5 - 30 mm 10 teeth 25 - 50 mm 6/10 teeth 25 - 50 mm 8 teeth 35 - 70 mm 5/8 teeth 35 - 70 mm 6 teeth 60 - 120 mm 4/6 teeth 80-110 mm 4 teeth 80 - 140 mm 3/4 teeth 120-200 mm 3 teeth 130 - 300 mm 2/3 teeth 180-250 mm 2 teeth 250 - 400 mm 1,4/2 teeth 250 - 400 mm 1,25 teeth Profiles and pipes 20 40 60 80 100 120 150 200 300 N° teeth per inch 1,5 14 14 14 14 14 10/14 10/14 10/14 10/14 2 10/14 10/14 10/14 10/14 10/14 10/14 10/14 10/14 10/14 3 10/14 10/14 10/14 10/14 8/12 8/12 8/12 8/12 6/10 4 10/14 8/12 8/12 8/12 8/12 8/12 6/10 6/10 6/10 5 8/12 8/12 8/12 8/12 6/10 5/8 5/8 5/8 5/8 6 8/12 8/12 8/12 8/12 6/10 5/8 5/8 5/8 4/6 8 6/10 6/10 6/10 6/10 5/8 5/8 5/8 5/8 4/6 10 6/10 5/8 5/8 5/8 5/8 5/8 4/6 4/6 12 5/8 5/8 5/8 5/8 4/6 4/6 4/6 3/4 15 5/8 4/6 4/6 4/6 4/6 3/4 3/4 20 4/6 4/6 4/6 3/4 3/4 2/3 2/3 30 4/6 3/4 3/4 3/4 2/3 2/3 40 3/4 3/4 3/4 3/4 2/3 2/3 50 3/4 2/3 2/3 50+ 2/3 2/3 Suggestions for correct use of bimetal band saws - The choice of tooth pitch per inch must be made according to the type of material to be cut. - The choice of cutting speed (progress and rotation) must be suitable for the quality of the material to be cut: Carbon steel (construction) 70/80 m/min - Tool steel 30/40 m/min - Alloy steel 35/50 m/min Stainless steel 30/40 m/min - Special steel, high-performance alloys 15/25 m/min Running-in the blade: a new blade has an extremely sharp edge on its teeth. By running it in, it is possible to round the edge of the tooth, which makes it possible to cut faster and for longer. If the blade is not run in, the teeth may break or chip. For running in purposes, we suggest reducing progress to 50% of what is indicated in the normal parameters. In the case of further vibration in the blade, reduce the rotation speed slightly. Make sure that blade tension is correct: incorrect tension may cause skew cuts or may break the blade. Make sure that the material is positioned in the vice in a way that reduces vibrations to a minimum: vibrations may cause teeth to break. Check the conditions of the cooling lubricant: the cooling lubricant helps to reduce heating in the band saw blade's teeth, as well as in the piece, and also removes the chips from the cutting point. Normally, a cutting oil and water emulsion is used, with a 1:10 ratio. N.B.: for cast iron, we suggest a dry cut. Band width: we suggest always choosing the maximum band width permitted by the machine, in order to take the utmost advantage of progress power, with increased blade stability. Further suggestions Check the shavings because they are the best indicators of correct progressing speed: The tooth shape may be: The tooth pitch may be: Variable pitch: over a length of 1 inch (25.4 mm), the distance between teeth varies. Even pitch: over a length of 1 inch (25.4 mm), the distance between teeth is constant. Normal tooth Standard With rake angle suitable to cut small diameters and thicknesses, and for thin profiles and pipes. Hook tooth type With positive rake angle Suitable for cutting solids and thick pipes. Positive Electron beam welded - HSS New blade With running-in Without running-in