Disclosed is a machine tool including: a base having a pair of first-axial slides facing each other at both sides of a mounting space; a saddle coupled to the first-axial slides of the base to slide in a first axis direction and having a pair of second-axial slides facing each other; a crosspiece coupled to the second-axial slides of the saddle to slide in a second axis direction and having a pair of third-axial slides facing each other; a vertical ram coupled to the third-axial slides of the crosspiece to slide in a direction perpendicular; and a table disposed in the mounting space of the base to be able to rotate relative to the base.

Disclosed is a machine tool including: a base having a pair of first-axial slides facing each other at both sides of a mounting space; a saddle coupled to the first-axial slides of the base to slide in a first axis direction and having a pair of second-axial slides facing each other; a crosspiece coupled to the second-axial slides of the saddle to slide in a second axis direction and having a pair of third-axial slides facing each other; a vertical ram coupled to the third-axial slides of the crosspiece to slide in a direction perpendicular; and a table disposed in the mounting space of the base to be able to rotate relative to the base.

A machining center for machining profiles may include: a base having a longitudinal axis, the base defining a work surface extending with first and second ends along the longitudinal axis, wherein the base is configured to receive a profile manually laid along the longitudinal axis of the base by an operator or by a specially-designed automatic feeder; a plurality of support and lock members for supporting and locking the profile on the base, wherein each of the support and lock members can be placed on respective profiled guides which extend parallel to the longitudinal extent of the base between the first and second ends, and wherein each of the support and lock members is displaceable independently along the longitudinal extent of the base; a pair of vertical columns, each of the columns supporting at least one first motorized spindle; and/or a portal structure, comprising an upper beam, above the base.

An air balance mechanism includes a plate part, fixed shafts, and movable cylinders. A flange is provided at one end of each of the fixed shafts. The movable cylinders are movable relative to the fixed shafts. A space is formed below a lower surface of the flange. Further, the air balance mechanism includes fixing bolts and adjusting bolts. The fixing bolts fix the flange and a plate part at positions different from the space. The adjusting bolts are inserted into the plate part through the space for allowing the postures of the fixed shafts to be adjustable.

A spacer for gear hobbing machine, a gear hobbing machine incorporating same, and an associated method are provided. The spacer includes a bore. One or more adjustment members are carried by the spacer and adjustable into and out of the bore. Adjustment of the adjustment members allows for varying the position of the spacer when mounted on an arbor of the gear hobbing machine.

A spacer for gear hobbing machine, a gear hobbing machine incorporating same, and an associated method are provided. The spacer includes a bore. One or more adjustment members are carried by the spacer and adjustable into and out of the bore. Adjustment of the adjustment members allows for varying the position of the spacer when mounted on an arbor of the gear hobbing machine.

An air balance mechanism includes a plate part, fixed shafts, and movable cylinders. A flange is provided at one end of each of the fixed shafts. The movable cylinders are movable relative to the fixed shafts. A space is formed below a lower surface of the flange. Further, the air balance mechanism includes fixing bolts and adjusting bolts. The fixing bolts fix the flange and a plate part at positions different from the space. The adjusting bolts are inserted into the plate part through the space for allowing the postures of the fixed shafts to be adjustable.

A machining center for performing a plurality of machining operations, such as drilling, milling, cutting, using rotating tools, on metal profiles having a longitudinal extent greater than their cross-section dimension, particularly but not exclusively made of aluminum. The machining center comprises a base defining a work surface extending longitudinally with first and second ends, upon which the profile is manually laid by an operator or by a specially-designed automatic feeder. The base has a plurality of members thereon for supporting and locking the profile, as well as a pair of vertical columns for supporting motorized spindles, each column being located next to said base and being configured to being displaced in either direction, parallel to the longitudinal extent of the base along respective slide guides located next to said base. Each vertical column is equipped with a first carriage configured to vertically sliding in either direction along its respective column and with a second carriage mounted to the first carriage, and configured to sliding in either direction perpendicular to its respective column. The center also comprises a portal structure whose upper beam above said base is equipped with a motorized spindle for rotating tools, mounted to a support body configured to angular displacements around a pivot for rotating about a first axis parallel to the longitudinal extent of the base.