Abstract: A band saw blade or hacksaw characterized because of it is machined with two rows of a plurality of cutting teeth, sustained and projecting from the base itself of the laminar body of the blade, the saw presents a laminar body at one of its ends while at the other end there are teeth with different geometries according to the use for soft cuts or hard cuts along the edge of said body of the band saw, being said rows formed by a pair of teeth of the same geometrical sizes of inverted "V" shape, but being in turn projected at an angular direction according to the required number of teeth +10 degrees, which is equivalent to the desired angle toward the external part of its axis, one with regard to the other, and alternatively followed by only one straight tooth of the same depth and so on, successively.

Abstract: A grinder plate for meat choppers having integral polygonal through holes is produced by powder metallurgy, and pores given to the plate at a porosity of 5 - 15% are impregnated with oil for providing the plate with self-cleaning and self-sharpening effects.

Abstract: A sleeve for protecting the wear of a driven stud shaft in a meat chopper. Said sleeve is releasably fittable to the stud shaft and movable integrally with said shaft for completely eliminating sliding wear therebetween.