Abstract: A tool holder (32) includes a rotary portion (36) securable in a spindle (20) of a machining center (10). A pumped flow of primary coolant (16) is delivered through spindle (20) and rotary portion (36). A pumped flow of secondary coolant (22) is delivered to a static connection (26) and through the static portion (34) of the tool holder. A tool guard assembly (42) secured to static portion (34) surrounds an installed superabrasive grinding wheel (66). It also includes flow paths (50, 52, 98; 62, 68, 82 84) and nozzles (70, 80, 86, 94) to direct coolant to pre-established directions. The tool may be installed automatically in a multipurpose machining center with no additional set up time required.

Abstract: On the tool spindle of a machine tool, a hollow ring is mounted on the headstock or on the sleeve flange thereof and is provided on its underside with an annular clearance forming an endless ring nozzle. A pressurized fluid is introduced into the channel of the hollow ring and passes out of the annular clearance in the form of a closed fluid curtain, so that a closed space surrounding the machining station is formed. So as to obtain a permanent seal with the fluid curtain, an annular element comprising a deflecting ring, a filter ring and a straightening ring is built into the annular channel and as a result the latter is subdivided into an upper and a lower partial ring channel. The suspended dust formed during the machining of a workpiece is held back by the fluid curtain, but the machining point is still visible and unimpeded access is possible.

Abstract: A device and method for removing chips generated by a tool operating on a workpiece using air, and for lubricating the tool using a fluid lubricant are proposed. The device includes a manifold containing air and fluid lubricant chambers, at least one lubricating fluid nozzle connecting to the lubricating fluid chamber and at least two air nozzles connected to the air chamber. The nozzles are located so that the lubricating fluid stream is directed to impinge the tool from a given direction, and the air streams are directed so that neither the chips generated nor the air streams themselves significantly disrupt the lubricating liquid stream.

Abstract: A table (1) revolving intermittently and carrying on its periphery piece-holder grips, has central openings (11), which make possible the discharge of working shavings and wastes at the center of the table itself (arrow 12) and not at the periphery (arrows 7, 7') as now is done. This makes possible direct discharge of the working shavings and wastes in the collection container underneath and avoids clogging and stopping of the machine for cleaning which requires the presence of additional labor and limits production. Nozzles (13, 13') direct fluid radially inwardly to assist in this central discharge of shavings and wastes.