A hole saw with a substantially cylindrical body, a center axis of rotation, an inner surface, and an outer surface. A cutting edge defined by a plurality of ground set teeth arranged in a pattern includes a first group of teeth oriented at angles toward the center axis of rotation intermixed with a second group of teeth oriented at an angle away from the center axis of rotation. The teeth angled away from the center axis of rotation are oriented at substantially the same angle and the teeth angled toward the center axis of rotation are oriented with each progressive tooth of the first group have an increasing angle relative to a prior tooth of the first group.

The invention relates to a saw blade 1 comprising a circular disc 2 having curved recesses 3 around its circumference. Each recess has a notch 5; a series of teeth 4 fitted within the recesses. Each tooth has a cutting bit 7 and a shank 6 separate from one another until installed. Each cutting bit 7 has a base with an aperture 14 therein; and a plurality of fixing members 13, The arrangement is characterised in that for each tooth 4, one of the fixing members 13 is engaged with the aperture 14 and extends from the cutting bit 7 to also engage a corresponding one of the notches 5 to restrain the tooth 4 from becoming dislodged from the recess 3 it is in.

The present invention relates to a novel cutting apparatus capable of effectively cutting a material via movement in at least two different directions. In certain embodiments, the cutting apparatus comprises cutting elements with at least two cutting surfaces. Such cutting elements are capable of effectively penetrating a material when moved with an applied force in the direction that at least one cutting surface is oriented. Such cutting elements may be configured for use with a variety of cutting apparatus, including but not limited to chainsaws, circular saws, band saws, jigsaws or tigersaws.

The present invention relates to a mechanical processing apparatus, belonging to the mechanical processing field. An integrated polymer material special saw blade with a diamond abrasive layer, including a disc-shaped blade substrate and a serration disposed on outer circumference of the disc-shaped blade substrate, the serration and the disc-shaped blade substrate are homogeneously integrated materials, and a diamond powder layer is disposed on the side of the serration and the side of a blade substrate region connected to the root of the serration. In this apparatus, the serrations are integrated with the substrate, so that the serrations are not required to be added through a complicated welding process in the later stage, effectively reducing processing difficulty and production costs, and the teeth pitch can be made smaller, which is more suitable for cutting thin-walled plastic profiles; the diamond abrasive layer on the side makes the saw blade have the dual functions of cutting and grinding, changing the single function of the traditional carbide circular saw blade only cutting and the diamond saw blade only grinding, effectively improving the abrasive resistance of the cutter teeth, and improving the service life of the cutter teeth.

A circular saw includes a generally circular base plate having a central point about which the base plate may rotate. The base plate has a peripheral edge about the circumference of the base plate. The peripheral edge defines a plurality of alternating tip seats and gullets, where the radial depth of the gullets may be less than the radial height of the tip seats. A plurality of tips are each disposed at a respective tip seat. The plurality of tips includes a first group of tips having at least one groove on a top face, and a second group of tips having at least one groove on a top face, where the groove of the first group is off set from the grove of the second group.

A circular saw blade includes a plurality of cutting teeth repeatedly alternating between a first set of cutting teeth and a second set of cutting teeth around the periphery of the saw blade. Each first set of cutting teeth includes at least two efficient cutting teeth, each second set of cutting teeth comprising at least one robust cutting tooth. Each first set of teeth and each second set of teeth are configured such that, if one tooth in the first set of teeth breaks, the chip load in the immediately following second set of teeth increases by less than approximately 45%.

The present invention provides an apparatus and method for cutting a chamfer into the edge of a material while simultaneously making another cut in the material. The chamfer provides the cut material with reduced susceptibility to top surface edge swell.

A cutting or grinding tool includes a blade. The blade includes a disc-shaped base metal, cutting or grinding tips (edges) provided on a peak (outer circumferential edge) of the base metal, and a protruding coating on a side face of the base metal along the entire outer circumference of the base metal.

Methods of grinding a sawblade include providing a sawblade plate; fabricating a plurality of sawblade teeth in the sawblade plate, each of the plurality of sawblade teeth having a pair of opposite tooth surfaces, a tooth back, a tooth gullet, a tooth face extending generally from the tooth back to the tooth gullet and a tooth edge on the tooth face; forming at least one blade relief in at least one of the opposite tooth surfaces of each of the plurality of sawblade teeth at the tooth face generally between the tooth edge and the tooth gullet; grinding the tooth edge of each of the plurality of sawblade teeth by rotation and movement of a grinding wheel along and against the tooth edge generally from the tooth back to the blade relief; and terminating the movement of the grinding wheel at the blade relief.

A novel approach to a commercial circular saw blade designed for efficient lumber cutting as well as extended saw blade life because of a reduction in friction and better heat dispersion. The saw plate has thicker body transitioning to a thinner rim at a point between the bottom of the gullet and the bottom of the tooth, generally occurring at the hook of the gullet. This design increases the lateral stiffness of the blade, improves accuracy, maximizes sawdust ejection, eliminates blade wandering, decreases the amount of the cut waste and allows for increased cutting speeds without decreasing the performance or longevity of the blade. This design goes against traditional, prior art saw blade design because of its interpretation of wood physics, blade friction and side clearance tolerances.