Abstract: A table saw includes a curved channel formed in a supporting base, a cradle attached to the supporting base, an arbor bracket attached to the cradle for supporting a saw blade and a motor, a height shaft attached to the cradle and extended through the curved channel of the base for engaging with the arbor bracket, a tilt shaft attached to the base and engaged with the cradle for adjusting the saw blade relative to the base to selected angular positions, a follower slidably engaged in the curved channel of the base, and a signal generating device attached to the follower for detecting a bevel angle of the arbor bracket and the cradle and the saw blade relative to the base and for precisely showing the angle with digits.

Abstract: A workbench includes a wheel device secured to a work table, four floor engaging extremities attached to the work table, four rotary members rotatably attached to the work table and engaged with the floor engaging extremities respectively for adjusting the work table up and down relative to the floor engaging extremities, and a coupling device for coupling the rotary members together and for allowing the rotary members to be rotated relative to the floor engaging extremities simultaneously and thus for allowing the work table to be adjusted up and down relative to the floor engaging extremities simultaneously. A hand wheel may be coupled to the coupling device for operating the coupling device.

Abstract: A work table includes a table plate having a slot for attaching a tool device, and a coupler for coupling to a vacuum device, a shield engaged onto the tool device for shielding the tool device and for gathering the dust, a hose coupling device coupled between the shield and the coupler, and a supporting device for adjustably supporting the hose coupling device to the work table at any required position. The hose coupling device may include two flexible hose members coupled to the shield and the coupler, and a rigid hose member coupled between the flexible hose members, and a rod extended from the rigid hose member for adjustably securing to the table with one or more brackets.

Abstract: A table saw includes a base having a spindle for changeably attaching two or more saw blades, a rail secured on the base, a carrier slidably engaged onto the rail for supporting a work piece, a table plate disposed on the base and having an opening facing toward the saw blades, and two or more inserts changeably engageable in the opening of the table plate and having a recess for fitting the saw blades of different width or thickness and for allowing the saw blades to be changed from each other and for conducting different sawing or working operations. The rail is preferably slidably and adjustably secured to the base for movably supporting the carrier.

Abstract: A work table includes a housing for supporting a working machine and having four corner areas, four leveling screws adjustably threaded to the corner areas of the housing, four lock nuts engaged with the leveling screws for selectively securing the leveling screws to the housing, four foot members attached to the leveling screws for stably engaging with a supporting surface, and four wheel devices attached to each of the corner areas of the housing for selectively engaging with the supporting surface, either of the foot members may be adjusted higher or lower than the wheel devices for allowing the housing to be moved to any required positions or to be stably supported on the supporting surface.

Abstract: A laser distance measuring system includes an object lens, a beam splitter, a transmitter, a receiver, and a shutter mechanism. The beam splitter is disposed at one side of the object lens. The transmitter emits a laser beam that is split by the beam splitter into a measurement beam and a reference beam. The measurement beam passes through the object lens, and is reflected by an object to result in a reflected measurement beam passing through the object lens. The receiver is disposed to receive the reflected measurement beam and the reference beam. The shutter mechanism includes a beam masker operable to move to either block path of the reflected measurement beam to the receiver or path of the reference beam to the receiver.

Abstract: A worktable includes a frame pivotally attached to a housing, a holder pivotally attached to the frame, a saw blade having a spindle rotatably attached to the holder, and a guide member attached to the spindle of the saw blade for guiding the work piece after being cut by the saw blade. A casing is secured to the frame and includes an outlet for coupling to a vacuum device. A follower is pivotally attached to the casing, for adjustably supporting the guide member, to allow the guide member to be adjusted relative to the frame and the housing. A positioning device may be used for positioning the spindle of the saw blade to the holder, to allow the saw blade to be attached to and disengaged from the holder.

Abstract: A working table includes a front guide rail and a rear guide rail attached to a table member, a lip fence includes a bar having a front portion slidably attached onto the front guide rail and a rear portion adjustable relative to the rear guide rail with an adjusting device for allowing the bar of the lip fence to be adjusted to different height relative to the working table for suitably supporting the lip fence and for preventing the lip fence from scratching or scraping or damaging the rear guide rail or the table member. It is preferable that the adjusting device may be adjusted to different distance or adjusted sidewise relative to the rear guide rail or the table member.

Abstract: A laser distance measuring system includes an object lens, a beam splitter, a transmitter, a receiver, and a shutter mechanism. The beam splitter is disposed at one side of the object lens. The transmitter emits a laser beam that is split by the beam splitter into a measurement beam and a reference beam. The measurement beam passes through the object lens, and is reflected by an object to result in a reflected measurement beam passing through the object lens. The receiver is disposed to receive the reflected measurement beam and the reference beam. The shutter mechanism includes a beam masker operable to move to either block path of the reflected measurement beam to the receiver or path of the reference beam to the receiver.

Abstract: A worktable includes a frame pivotally attached to a housing, a holder pivotally attached to the frame, a saw blade having a spindle rotatably attached to the holder, and a guide member attached to the spindle of the saw blade for guiding the work piece after being cut by the saw blade. A casing is secured to the frame and includes an outlet for coupling to a vacuum device. A follower is pivotally attached to the casing, for adjustably supporting the guide member, to allow the guide member to be adjusted relative to the frame and the housing. A positioning device may be used for positioning the spindle of the saw blade to the holder, to allow the saw blade to be attached to and disengaged from the holder.

Abstract: A worktable includes a frame pivotally attached to a housing, a holder pivotally attached to the frame, a saw blade having a spindle rotatably attached to the holder for cutting one or more work pieces, and a guide member attached to the spindle of the saw blade, for engaging with and for guiding the work piece after being cut by the saw blade. A casing is secured to the frame and includes an outlet for coupling to a vacuum device. A follower is pivotally attached to the casing, for adjustably supporting the guide member, to allow the guide member to be adjusted relative to the frame and the housing. A shield may be attached to the guide member, for shielding the saw blade, and may be coupled to a vacuum device.

Abstract: A fastening device for fastening a tool member to a machine tool includes a mouth having an inclined inner peripheral surface, a chuck member received in the mouth and having one or more spring blades and having an inclined outer peripheral surface for engaging with the inclined inner peripheral surface of the mouth, and a shaft received in the chuck member. The spring blades may be forced radially inward to clamp the shaft in the chuck member when the mating inclined peripheral surfaces of the chuck member and of the mouth are moved relative to each other.

Abstract: A work table includes a pivotal arm, a track, and a sliding table slidably engaged on the track. One or more pairs of wheels are supported on the arm for slidably supporting a pole which is extendible relative to the arm. The pole includes a free end portion coupled to the suspended portion of the sliding table to support the suspended portion of the sliding table in place. The wheels may include a peripheral recess for stably receiving the pole. A barrel is secured to the pole, and a pin is secured to the sliding table and engaged in the barrel for supporting the sliding table.