A dual-spindle circular saw (1) for sawing wood (2) with two saw groups (3) is proposed, wherein each saw group (3) comprises a drive (7) having an armature (5) and a stator (6) for rotary driving of a saw spindle (9) which is mounted in a housing (8) and which is connected in a rotationally fixed manner to at least one saw tool (11) comprising at least one exchangeable circular saw blade (10), and wherein the center distance (A) of the saw spindles (9) is adjustable by means of an actuator. In order to create particularly advantageous design conditions, it is proposed that the armature (5) is arranged in a rotationally fixed manner on the saw spindle (9) and the stator (6) is arranged in a rotationally fixed manner in the housing (8) between a fixed bearing (13) and a floating bearing (14) of the saw spindle (9), wherein the saw tool (11) is floatingly mounted on the saw spindle (9).

A levelling apparatus for use in gang saws comprises first and second wedge portions. The first wedge portion comprises upper and lower surfaces, wherein the lower surface is nonparallel to the upper surface. The first wedge portion further comprises a plurality of openings for accepting mounting fasteners. The openings are arranged in a spaced, circular pattern about a centre of the first wedge portion. The second wedge portion also comprises upper and lower surfaces, wherein the upper surface is nonparallel to the lower surface. The second wedge portion further also comprises a plurality of openings for accepting the mounting fasteners. The second wedge openings correspond to the first wedge openings. Rotation of the first wedge portion with respect to the second wedge portion varies an angle between the first wedge upper surface and the second wedge lower surface, thereby allowing for angular adjustment.

A cutting tool for cutting a metal workpiece includes a first portion, and a second portion. The first portion includes a first outer surface, a first shaft, and at least one cutting insert attached to the first outer surface. The second portion includes a second outer surface and a second shaft. The first and second shafts are disposed coaxially around an axis. The first and second outer surfaces are disposed adjacent to one another. The first and second outer surfaces are configured to rotate around the axis in opposite directions.

A levelling apparatus for use in gang saws comprises first and second wedge portions. The first wedge portion comprises upper and lower surfaces, wherein the lower surface is nonparallel to the upper surface. The first wedge portion further comprises a plurality of openings for accepting mounting fasteners. The openings are arranged in a spaced, circular pattern about a centre of the first wedge portion. The second wedge portion also comprises upper and lower surfaces, wherein the upper surface is nonparallel to the lower surface. The second wedge portion further also comprises a plurality of openings for accepting the mounting fasteners. The second wedge openings correspond to the first wedge openings. Rotation of the first wedge portion with respect to the second wedge portion varies an angle between the first wedge upper surface and the second wedge lower surface, thereby allowing for angular adjustment.

A levelling apparatus for use in gang saws comprises first and second wedge portions. The first wedge portion comprises upper and lower surfaces, wherein the lower surface is nonparallel to the upper surface. The first wedge portion further comprises a plurality of openings for accepting mounting fasteners. The openings are arranged in a spaced, circular pattern about a centre of the first wedge portion. The second wedge portion also comprises upper and lower surfaces, wherein the upper surface is nonparallel to the lower surface. The second wedge portion further also comprises a plurality of openings for accepting the mounting fasteners. The second wedge openings correspond to the first wedge openings Rotation of the first wedge portion with respect to the second wedge portion varies an angle between the first wedge upper surface and the second wedge lower surface, thereby allowing for angular adjustment.

A pipe cutting machine comprises: rotary blades in a pair, with a plane at a right angle to a center line of a pipe, the rotary blades being arranged to face each other on both sides of a y axis in such a manner that blade edges of the rotary blades overlap each other in an x-axis direction; a straightforward driving mechanism that drives the rotary blades straightforward in opposite directions of a y-axis direction so as to make the rotary blades pass each other on the x axis and in the vicinity of the x axis; and power direction conversion mechanisms that move the rotary blades outwardly to get farther from the y axis for avoiding interference between the blade edges when the rotary blades pass each other on the x axis and in the vicinity of the x axis.

A sawing and drilling combined machining device includes a frame, a clamping mechanism, a sawing mechanism and a drilling mechanism; the frame includes a first end for mounting the clamping mechanism, a second end for mounting the drilling mechanism, and a third end for mounting the sawing mechanism, the first end and the second end are two opposite ends of the frame in a horizontal direction, and the third end is at an upper end or a lower end of the frame between the first end and the second end.

A levelling apparatus for use in gang saws comprises first and second wedge portions. The first wedge portion comprises upper and lower surfaces, wherein the lower surface is nonparallel to the upper surface. The first wedge portion further comprises a plurality of openings for accepting mounting fasteners. The openings are arranged in a spaced, circular pattern about a centre of the first wedge portion. The second wedge portion also comprises upper and lower surfaces, wherein the upper surface is nonparallel to the lower surface. The second wedge portion further also comprises a plurality of openings for accepting the mounting fasteners. The second wedge openings correspond to the first wedge openings Rotation of the first wedge portion with respect to the second wedge portion varies an angle between the first wedge upper surface and the second wedge lower surface, thereby allowing for angular adjustment.

An apparatus for cutting a window covering comprises a saw for cutting the window blind. A clamp assembly moves the window covering relative to the saw. A controller moves the clamp assembly to automatically position an end of the window covering relative to the saw. The saw is moved into engagement with the window covering to cut the window covering. A dust collection system comprises a shroud substantially surrounds the bottom of the saw blade where the shroud is connected to a vortex dust collector.

A twin-head bar cutting device includes a first cutting head and a first bar holding device as well as a second cutting head and a second bar holding device placed on a common base. The base includes a first placement surface on which the first cutting head is placed, a second placement surface on which the second cutting head is placed, and a holding device placement surface formed higher than the first placement surface and the second placement surface between the first placement surface and the second placement surface and on which the first bar holding device and the second bar holding device are placed, and the first cutting head and the second cutting head are arranged symmetrically about a vertical plane passing through a center in a width direction of the base.