A hacksaw blade may include a first end having a first mounting orifice, a second end having a second mounting orifice, a first side face extending from the first end to the second end, and a second side face, opposite the first side face and extending from the first end to the second end. The blade may further include a top edge extending from the first end to the second end between the first and second side faces, a cutting edge disposed opposite the top edge and including cutting teeth disposed thereon, and a tension focusing slot disposed between the first end and the second end, and spaced apart from each of the top edge and the cutting edge. The slot may be formed by material removal from at least the first side face.

A hacksaw blade may include a first end having a first mounting orifice, a second end having a second mounting orifice, a first side face extending from the first end to the second end, and a second side face, opposite the first side face and extending from the first end to the second end. The blade may further include a top edge extending from the first end to the second end between the first and second side faces, a cutting edge disposed opposite the top edge and including cutting teeth disposed thereon, and a tension focusing slot disposed between the first end and the second end, and spaced apart from each of the top edge and the cutting edge. The slot may be formed by material removal from at least the first side face.

Hockey sticks or other tubular shafts have historically been cut using a hack saw with the shaft resting on the lip of a garbage can resulting in slow and inaccurate cuts. A new device for cutting a shaft comprises a holder for receiving the shaft, and an arm rotatably mounted at an end of the holder. The holder includes an internal passage, sized to receive the shaft, which extends outwardly through an opening at the end of the internal passage. A set of jaws are mounted on the rotating arm, each jaw includes a saw blade extending across the opening perpendicular to the shaft. The jaws are spring biased together at a first end for engaging the shaft, whereby relative rotation of the arm and the holder results in the saw blades sawing the end of the shaft off with high precision. Each jaw may include a lever arm extending from a second end thereof configured to receive an application of a user force to overcome the spring bias force to enable the set of jaws to be separated for mounting the shaft therebetween.

Hockey sticks or other tubular shafts have historically been cut using a hack saw with the shaft resting on the lip of a garbage can resulting in slow and inaccurate cuts. A new device for cutting a shaft comprises a holder for receiving the shaft, and an arm rotatably mounted at an end of the holder. The holder includes an internal passage, sized to receive the shaft, which extends outwardly through an opening at the end of the internal passage. A set of jaws are mounted on the rotating arm, each jaw includes a saw blade extending across the opening perpendicular to the shaft. The jaws are spring biased together at a first end for engaging the shaft, whereby relative rotation of the arm and the holder results in the saw blades sawing the end of the shaft off with high precision. Each jaw may include a lever arm extending from a second end thereof configured to receive an application of a user force to overcome the spring bias force to enable the set of jaws to be separated for mounting the shaft therebetween.

An accessory for use with an oscillating power tool. The accessory includes an attachment portion including a mounting aperture arrangement configured to couple with the oscillating power tool. The accessory also includes a body extending away from the attachment portion in a longitudinal direction defining a longitudinal axis, a distal end portion including a generally planar surface and a cutting edge configured to perform a material-removing operation, and a conduit extending from proximate the cutting edge towards the attachment portion. The conduit is configured to convey material removed during the material-removing operation towards a vacuum system.

An accessory for use with an oscillating power tool. The accessory includes an attachment portion including a mounting aperture arrangement configured to couple with the oscillating power tool. The accessory also includes a body extending away from the attachment portion in a longitudinal direction defining a longitudinal axis, a distal end portion including a generally planar surface and a cutting edge configured to perform a material-removing operation, and a conduit extending from proximate the cutting edge towards the attachment portion. The conduit is configured to convey material removed during the material-removing operation towards a vacuum system.

An apparatus for a quick release cutting device blade assembly is provided. The apparatus includes a blade carrier assembly. The blade carrier assembly includes an adaptor and a backing plate configured to fit over the central post and including a second flat surface. The adaptor includes a flat end plate including a first flat surface, a central post, and a female threaded portion configured to be engaged to a male threaded portion of an output shaft of a cutting device. The blade carrier assembly is configured to affix a cutting device blade between the first flat surface and the second flat surface. The female threaded portion includes a thread pattern configured for resisting a tool-lock condition when a force transmitted through teeth of the thread pattern is maintained below a maximum operational force.

An apparatus for a quick release cutting device blade assembly is provided. The apparatus includes a blade carrier assembly. The blade carrier assembly includes an adaptor and a backing plate configured to fit over the central post and including a second flat surface. The adaptor includes a flat end plate including a first flat surface, a central post, and a female threaded portion configured to be engaged to a male threaded portion of an output shaft of a cutting device. The blade carrier assembly is configured to affix a cutting device blade between the first flat surface and the second flat surface. The female threaded portion includes a thread pattern configured for resisting a tool-lock condition when a force transmitted through teeth of the thread pattern is maintained below a maximum operational force.

A scroll saw includes a base providing a worktable, a motor mounted in the base and having an output shaft, a transmission unit mounted in the base and including first and second transmission devices respectively connected to the two opposite ends of the output shaft of the motor and respectively disposed above and below the worktable, and a saw blade having opposing top and bottom ends respectively connected to the first and second transmission devices of the transmission unit. Thus, when the motor is started, the first and second transmission devices are driven to alternatively move forward and backward in a reciprocating action, and the saw blade is driven to move up and down in a reciprocating action, avoiding vibration of the saw blade and the base and enhancing cutting stability.

A scroll saw includes a base providing a worktable, a motor mounted in the base and having an output shaft, a transmission unit mounted in the base and including first and second transmission devices respectively connected to the two opposite ends of the output shaft of the motor and respectively disposed above and below the worktable, and a saw blade having opposing top and bottom ends respectively connected to the first and second transmission devices of the transmission unit. Thus, when the motor is started, the first and second transmission devices are driven to alternatively move forward and backward in a reciprocating action, and the saw blade is driven to move up and down in a reciprocating action, avoiding vibration of the saw blade and the base and enhancing cutting stability.