A tool receptacle for a screw-in tool having a main body, which has a receiving region including at least one conical contact surface for supporting a corresponding conical support surface of the screw-in tool. For thread-protection and for tightening with high concentricity and low production outlay, an insert is disposed in the main body, the insert is movable transversely with respect to the longitudinal axis of the main body and is rotationally-fixed with respect to the main body and has a mating thread for a thread on the screw-in tool.

A power tool accessory includes a shank member having a first hardness. A conically-shaped body is coupled to the shank member and includes a series of stepped shoulders that increase in diameter from a tip portion to a base portion. A flute extends substantially from the tip portion to the base portion, with cutting edges defined at the intersection of the flute and the shoulders. The body has a second hardness greater than the first hardness.

In a saw arbor guide assembly, saw guides include a sensor and one or more connector units. The connector units may be proximate to one or both of the head surfaces, with the connector units receiving data from the sensor. The connector units communicate with other connector units located on adjacent saw guides within the stack. The communications comprise data received from the sensor. The primary and secondary guide manifolds are arranged at opposite ends of the stack. The primary and second guide manifolds include manifold connectors. The manifold connectors on the primary guide manifold communicate with the connector units on a first saw guide in the stack. The manifold connectors on the secondary guide manifold communicate with the connector units on a last saw guide in the stack. The server communicates with the manifold connectors in one or both of the primary guide manifold and the secondary guide manifold.

A cutting tool includes a hole saw, a pilot bit, and an arbor assembly. The arbor assembly includes a shank, a body, a first engagement member moveable relative to the shank, the first engagement member engaging the hole saw to releasably secure the hole saw to the shank, and a second engagement member moveable relative to the shank, the second engagement member engaging the pilot bit to releasably secure the pilot bit to the shank. The body is moveable to a first position where the hole saw and the pilot bit are secured to the arbor assembly, to a second position where the first engagement member disengages the hole saw, allowing removal of the hole saw from the shank, and to a third position where the second engagement member disengages the pilot bit, allowing removal of the pilot bit from the shank.

A cutting tool may include a cutting accessory defining an opening and a channel formed on an inner surface of the cutting accessory. A cutting tool may include an arbor assembly including a shank having a first end received in the opening of the cutting accessory and a second end configured to be coupled to a power tool, a body movable relative to the shank, and an engagement member movable with the body relative to the shank, the engagement member configured to selectively engage the channel of the cutting accessory to releasably secure the cutting accessory to the shank.

A cutter holder assembly has a cutter holder, a cutting unit, a joint connector, and a nut. The cutter holder has a receiving hole, a conical hole, and a connection hole disposed therein and communicating with one another. The cutting unit has an assembling portion inserted in the conical hole, an engaging hole being polygonal, an extension pole extending from the assembling portion, and at least one machining tool assembled to the extension pole. The joint connector is disposed in the receiving hole and has a connection section threaded within the connection hole and an engaging section engaging with the engaging hole. The nut is connected to the cutter holder. Wherein, the joint connector is fixed within the cutter holder and engages with the cutting unit to firmly connect the cutter holder and the cutting unit and to promote machining efficiency and quality of the cutter holder assembly.