A main spindle device for a machine tool including a rotary joint configured by a distributor fixedly provided to a frame and a shaft provided to be non-rotatable to a main spindle. The rotary joint is configured by a first rotary joint part and a second rotary joint part that are continuous in an axis line direction of a main spindle. The first rotary joint is the other end side of the frame and is configured by a first distributor having a shaft shape and a first shaft having a cylindrical shape, and the second rotary joint is configured by a second distributor having a cylindrical shape and a second shaft having a shaft shape.

A pivoting vacuum fitting support vacuum post enables fittings to be quickly manually re-oriented during set up, break down, storage, and shipping of a vacuum support or other device using the vacuum post. A segmented core pivotally supports an outer fitting pivoting support sleeve that supports a pair of segregated and independently operable vacuum ports typically to supply vacuum independently to a base of a vacuum support to hold it in place, and to an upper work piece vacuum hold down support. Incorporation of a spacer that can be supplied in varying heights enables use of the vacuum post in a variety of vacuum supports of varying height.

There is provided a rotary table device including: a rotary table; a center shaft erected toward the rotary table; a housing including an inner peripheral surface having a circular cross section over a predetermined range along a rotation axis; a center sleeve including an outer peripheral surface having a circular cross section corresponding to the inner peripheral surface, and the outer peripheral surface being concentric with the inner peripheral surface; a plurality of recesses formed in at least one of the inner circumferential surface and the outer circumferential surface; a plurality of O-rings disposed to be sandwiched between the inner peripheral surface and the outer peripheral surface; an in-housing fluid flow path formed inside the housing; and a plurality of in-sleeve fluid flow paths formed inside the center sleeve.

In a device for swivelling, turning and changing pallets on a horizontal machining center, with swivel arms that can be synchronously swiveled about a swivel axis, each of them having a pallet carrier turnable around a turning axis, for docking and undocking of at least one pallet, which can be connected to a power supply that also provides a vacuum for fixing the workpiece; on the pallet carrier, a power supply interface connected with the power supply via the swivel arm is provided which can be moved along.

A pivoting vacuum fitting support vacuum post enables fittings to be quickly manually re-oriented during set up, break down, storage, and shipping of a vacuum support or other device using the vacuum post. A segmented core pivotally supports an outer fitting pivoting support sleeve that supports a pair of segregated and independently operable vacuum ports typically to supply vacuum independently to a base of a vacuum support to hold it in place, and to an upper work piece vacuum hold down support. Incorporation of a spacer that can be supplied in varying heights enables use of the vacuum post in a variety of vacuum supports of varying height.

A high-pressure cutting fluid guide apparatus of a turret head of a machine tool is provided. When a high-pressure cutting fluid is input to a cutting liquid passage, the high-pressure cutting fluid flows along a through hole of a water guide cylinder, and passes through a main perforation of a partition, and then flows to a water outlet of a sealing ring to be guided into a water inlet of a cutting disc. A secondary perforation of the partition guides the high-pressure cutting fluid in the through hole to a press surface portion of the sealing ring. The sealing ring is located in an annular trough, and the press surface portion is pushed by the high-pressure cutting fluid pressure to generate the energy of the axial displacement.

A cutting machine waste extraction apparatus is provided for a cutting machine that cuts a plate where the cutting machine waste extraction apparatus is supported adjacent a cutting area at a cutting table. The cutting machine produces waste at the cutting area during the cutting of the plate where the apparatus includes a ducting system having a first duct that receives the waste from the plate, and a second duct that receives the waste from the first duct. The first duct is movable along the length of the second duct and the second duct includes a lengthwise opening which is sealed by a flexible belt. The flexible belt is deformable from sealed contact with the second duct, adjacent a junction apparatus, where the junction apparatus provides a fluid connection between the first duct and the second duct.