Bernardo general catalog metal Page 465
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General details for bandsaws Running-in of bandsaw blades Correct running-in of new bandsaw blades prevents premature teeth breakage. Bandsaw blade teeth end up stronger and sharper than before, allowing to reach full performance and prolonging life span. New bandsaw blade Bandsaw blade with running-in Bandsaw blade without running-in What is involved when running-in bandsaw blades Identify the suitable cutting speed (m/min) and feed (mm/min) for the type and dimensions of the workpiece. Perform a cut at half of the evaluated feed recommendation (which doubles the length of cutting time) and approximatly 70% of the suggested speed. In case of vibrations or excessive noise, try and slightly lower the cutting speed. After about 15- 20 min gradually increase feed until regular cutting capacity is achieved. Clamping of the workpiece Pay attention to the correct positioning and clamping of the workpiece so it cannot move and to avoid vibrations. We recommend using evenly shaped, intact workpieces which can be clamped accordingly. The closer the bandsaw blade guide sits at the clamped workpiece, the better the results will be. Optimal speed and feed adjustment Looking at the cutting chips gives a good indication about the choice of feed and speed settings. Silver, loosely fallen, evenly spiral shaped chips suggest that feed and speed settings are correctly chosen. When chips are burnt and dense, reduce the feed and/or the bandsaw blade speed. Thin, frayed chips suggest that the feed has to be increased however bandsaw blade speed has to be reduced. Ideal chips Thin chips Burnt chips 463
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