Abstract: Installed in a band saw formed of a frequency converter, a motor, a driving wheel set and a band saw blade, a cutting speed display device is disclosed to include a modulator electrically connected to the frequency converter to output a linear modulation signal to the frequency converter for modulating the frequency of the output electrical power of the frequency converter so as to regulate the speed of the motor, and a display device that has a circuit device electrically connected to the modulator for receiving the linear modulation signal outputted by the modulator and converting the received linear modulation signal into a band saw blade cutting speed subject to one of a number of calculation modules set therein for enabling the band saw blade cutting speed to be displayed on the display panel. Thus, the cutting speed display device indicates the cutting speed of the band saw blade of the band saw in real time, and eliminates the problem of floating of the displayed data.

Abstract: A guiding device for guiding movement of a saw blade of a band saw includes a holder base and two saw blade guiding units. The holder base includes a base portion for mounting to the band saw, and two parallel supporting arms. Each of the saw blade guiding units has a sleeve fastened to a transversely extending through hole of one of the supporting arms, a ball rotatably received in the sleeve, and a wheel having a metal wheel shaft with one end inserted into the sleeve and stopped at the ball, and a wheel body made of ceramic material and connected to the other end of the wheel shaft for stopping against one lateral side of the saw blade.

Abstract: A guiding device for guiding movement of a saw blade of a band saw includes a holder base and two saw blade guiding units. The holder base includes a base portion for mounting to the band saw, and two parallel supporting arms. Each of the saw blade guiding units has a sleeve fastened to a transversely extending through hole of one of the supporting arms, a ball rotatably received in the sleeve, and a wheel having a metal wheel shaft with one end inserted into the sleeve and stopped at the ball, and a wheel body made of ceramic material and connected to the other end of the wheel shaft for stopping against one lateral side of the saw blade.

Abstract: A workpiece-holding device for holding a workpiece on a worktable of a band saw machine having a vertically moveable saw blade guide and a saw blade running through the worktable and the vertically moveable saw blade guide is disclosed. The workpiece-holding device includes a suspension arm for horizontally and axially moveably mounting to the vertically moveable saw blade guide of the band saw machine, an offset member having an end horizontally and perpendicularly connected to the suspension arm, and a holding pin vertically and perpendicularly connected to the other end of the offset member for stopping at a workpiece on the worktable such that the workpiece is rotatable about the holding pin on the worktable for enabling the workpiece to be cut into an arched or circular shape by the saw blade.

Abstract: A scrap collector is comprised of a separator, a ventilating device, a chipping collecting container, a collecting bag, and a communicating pipe. The separator includes an air chamber, an inlet communicating with the air chamber, and a bottom hole communicating with the air chamber. The ventilating device is mounted on the separator and is provided with an outlet, generating an airflow flowing towards the outlet. The chipping collecting container is mounted under the separator, including an opening connected with the bottom hole of the separator. The collecting bag is mounted inside the chipping collecting container, including an opening in communication with the air chamber. An airtight room is defined between the chipping collecting container and the collecting bag. The communicating pipe has two ends respectively communicating with the air chamber and the room. Accordingly, the pressure inside the collecting bag and the room remains equal.

Abstract: A cleaning device is used in a dust collector having a body and a tubular filter set mounted in the body for cleaning the inside wall of the tubular filter set of the dust collector. The cleaning device includes a first shaft transversely pivoted to the body of the dust collector and provided with a driving member, a second shaft longitudinally pivoted to the body of the dust collector and provided with a driven member coupled to the driving member of the first shaft, and elastic scrapers mounted on the second shaft and contacted with the inside wall of the tubular filter set for removing dust from the inside wall of the tubular filter set upon rotary motion of the second shaft subject to the rotation of the first shaft.

Abstract: A mobile rack for a dust collector includes a base frame on which the dust collector is mountable, a support frame detachably fastened to the base frame, and a plurality of wheels detachably mounted on the base frame such that the base frame is movable on a floor. The support frame has a mounting portion connectable to a part of the dust collector that is mounted on the base frame.

Abstract: A band saw includes a frame, which has a worktable and a saw blade extended through and movable relative to the worktable, and an aiming device, which has a casing moveably mounted in the frame, a light-emitting member mounted in the casing for emitting a light beam onto the worktable for linear cutting, and an adjustment unit for operation by the user to move the casing on the frame.

Abstract: A band saw includes a saw base having an upright support, a worktable supported on the upright support and tiltable relative to the saw base, and an adjustment mechanism for driving the worktable to tilt relative to the saw base. The adjustment mechanism includes a locating seat fastened to the saw base and provided with a guiding channel, and a movable bar slidably inserted through the guiding channel of the locating seat. The movable bar has an end slidably coupled to the worktable. A driving unit is connected to the movable bar for driving the movable bar to move axially.

Abstract: A scrap collector is comprised of a separator, a ventilating device, a chipping collecting container, a collecting bag, and a communicating pipe. The separator includes an air chamber, an inlet communicating with the air chamber, and a bottom hole communicating with the air chamber. The ventilating device is mounted on the separator and is provided with an outlet, generating an airflow flowing towards the outlet. The chipping collecting container is mounted under the separator, including an opening connected with the bottom hole of the separator. The collecting bag is mounted inside the chipping collecting container, including an opening in communication with the air chamber. An airtight room is defined between the chipping collecting container and the collecting bag. The communicating pipe has two ends respectively communicating with the air chamber and the room. Accordingly, the pressure inside the collecting bag and the room remains equal.

Abstract: An industrial scrap collector is comprised of a separator, a ventilating device, and a chipping-collecting container. The separator includes an air chamber formed inside, an inlet formed at a side thereof for communicating the air chamber with outside, a bottom hole formed at a bottom end thereof for communicating the air chamber with outside, a guide member spirally disposed on an inner periphery of the separator and having a top end and a bottom end respectively abutting the inlet and the bottom hole. The ventilating device includes an outlet, mounted on the separator for generating an airflow flowing towards the outlet. The chipping-collecting container is mounted under the separator, including an opening formed at a top end thereof for communicating with the bottom hole of the separator. Accordingly, the industrial scrap collector can collect the chippings and dust more efficiently.

Abstract: An air jet for a machine tool to clean cutting dust has a housing with a hole and an outlet. An eccentric member has a cam and is provided in the housing which the eccentric member is driven by a power resource of the machine tool for rotation. An annular transmission is engaged with the eccentric member. A driving member is driven by the transmission for linear reciprocating motion. A flexible film is provided in the housing covering the outlet and has an inlet corresponding to the driving member, wherein the inlet of the film is sealed and the film is pressed for strain while the driving member is moved toward the film, and a tube has an end thereof connected with the outlet.

Abstract: A band saw replacing device includes a slide seat mounted on a top seat of a machine stand of a band sawing machine, an adjustment rod connected with the slide seat, a pivoting member, and a wrenching member. The pivoting member is pivotally connected to the top seat of the machine stand at an end thereof and is connected with the adjustment rod. The wrenching member is pivotally mounted on the top seat and has an arched engaging portion extending outwards therefrom for supporting the other end of the pivoting member. Accordingly, it's as easy as pushing the wrenching member to facilitate lowering the adjustment rod and to further shorten a distance between a driving wheel mounted on the slide seat and a driven wheel mounted on the machine stand, thereby replacing a band saw fitted on the driving wheel and the driven wheel rapidly and efficiently.

Abstract: A housing of a band sawing machine is composed of a bottom shell and at least one cover shell. The bottom shell and the cover shell are respectively made of a metal sheet by stamping. The bottom shell has a peripheral wall perpendicularly extending from a border thereof. The cover shell has a lateral side hinged to a lateral side of the peripheral wall of the bottom shell such that the cover shell can be turned to close/open the housing. According to an alternate design of the present invention, the housing is composed of a bottom shell and two cover shells respectively hinged to the lateral side of the peripheral wall of the bottom shell at different elevations.

Abstract: A dust collector includes a mounting seat mounted outside dust outlets of a housing of a band sawing machine, a boosting unit received in the mounting seat, and a dust collecting member. The mounting seat has an axial portion and a through hole passing through the axial portion. The boosting unit includes a rotor and a fan blade. The rotor has a body portion rotatably mounted through the through hole of the mounting seat and fitted to the fan blade at a distal end thereof, and a head portion connected with a transmission shaft of a drive motor of the band sawing machine. The dust collecting member is connected with the mounting seat and includes a receiving space. Accordingly, the dust collector is synchronically activated together with the band sawing machine to run for collecting sawdust.

Abstract: An apparatus for adjusting the worktable of the band sawing comprising a base providing at the band sawing machine. Two turning pieces, each of which has a first guiding slot, a second guiding slot and a rack. The turning pieces fix at the bottom side of the worktable with the base locating between the turning pieces. A guiding shaft pivots at said base via the first guiding slots of the turning pieces. An adjusting shaft pivots at the base. Each end of said adjusting shaft respectively has a gear engaging with the racks of the turning pieces respectively. A pressing shaft pivots at the base via the second guiding slots of the turning pieces, and a locking member engages with the pressing shaft.