Abstract: A circular saw blade is provided with a first bore of a first size, configured for engagement with a first size arbor. The disk also has a second bore of a second size configured for engagement with a second size arbor. The second bore is disposed concentrically with the first bore, and is placed within a knockout portion of a disk secured to a face of the saw blade. The knockout portion is removable for enlarging an inner transverse dimension of the disk beyond that of the first bore. The second transverse dimension is within an ISO H7 standard tolerance. The disk is thus configured for mounting the second bore on the second size arbor, and alternatively for removing the knockout portion to mount the first bore on the first size arbor.

Abstract: A circular saw blade is provided with a first bore of a first size, configured for engagement with a first size arbor. The disk also has a second bore of a second size configured for engagement with a second size arbor. The second bore is disposed concentrically with the first bore, and is placed within a knockout portion of a disk secured to a face of the saw blade. The knockout portion is removable for enlarging an inner transverse dimension of the disk beyond that of the first bore. The second transverse dimension is within an ISO H7 standard tolerance. The disk is thus configured for mounting the second bore on the second size arbor, and alternatively for removing the knockout portion to mount the first bore on the first size arbor.

Abstract: A tool such as a circular diamond abrasive saw blade includes a circular metallic body having a substantially central aperture through which the saw blade is mountable to a rotatable drive shaft, and a plurality of cutters disposed in spaced relation along a periphery of said body. A plurality of gullets are located in spaced relation between the cutters, extending radially inward from the periphery. The gullets are sized and shaped in the form of alphanumeric or graphical indicia.

Abstract: A tool such as a circular diamond abrasive saw blade includes a circular metallic body having a substantially central aperture through which the saw blade is mountable to a rotatable drive shaft, and a plurality of cutters disposed in spaced relation along a periphery of said body. A plurality of gullets are located in spaced relation between the cutters, extending radially inward from the periphery. The gullets are sized and shaped in the form of alphanumeric or graphical indicia.

Abstract: A vertical gang saw produces an ovoidal sawing curve when the frame has at each corner attached feet that are engaged in slide bars which themselves are attached by an extremity to the body of the machine. The lower and upper slide bars undergo a synchronized swing movement that is transmitted by small drive rods. The lower drive rods are driven by an eccentric gear moved vertically. The upper drive rods are driven by an oscillating pinion with a double cam.