Abstract: A hydraulic gang saw frame is provided with an elastic sealing sheet covering the entire top side of hydraulic cylinder and piston units for stretching saw blades. The pistons pass through openings in center portion of the sealing sheet and are firmly connected through latter. The preferred portion of the sheet covers at least three lateral sides of the frame. The elastic deformation of the sheet is such as to permit full strokes of the pistons.

Abstract: A circular saw blade is subdivided into two sectors by a serpentine-shaped interruption cut so that at least one noise-damping slot is formed between the two sectors. The serpentine cut forms in the two sectors projections alternating with recesses. The projections of one sector are received in the recesses of the opposite sector. The adjacent projections of the opposite sectors are spaced from each other in the regions of their backsides. The spacing between the backsides of the opposite projections increases towards a central bore of the saw blade.