Importance

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Abstract

The present invention relates to a saw blade for preventing undercut wherein out of the sludge discharging slots arranged together with undercutting segments and ordinary cutting segments on the circumference of a steel wheel, those slots located behind the undercutting segments are dimensioned larger or wider than the slots behind the ordinary cutting segments in order to prevent the breakage and falling-off of the undercut preventing segments and ordinary cutting segments. Thus, according to the invention, there is provided a saw blade including a steel wheel, and on the circumference of said steel wheel, plural ordinary cutting segments and undercut preventing segments, two or more segments of one type being arranged alternately with one or more segments of the other type, characterized in that at the rear faces of respective ordinary cutting segments narrow slots with a predetermined narrow clearance n are formed for minor discharge of cut sludge and at the rear faces of respective undercut preventing segments wide slots with a larger clearance w than the narrow slots are formed for major discharge of cut sludge, the directions being based on the rotation of the blade wheel.

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First Claim