Abstract: A spindlehead for tools is insertable into a tool disk with holders provided for such spindleheads. A spindle holds the shank of the tool in its chuck at its front end section, and is rotatably mounted by a spindle bearing in a spindlehead housing. A coolant feed extends at least in part in the spindlehead housing to convey coolant to the tool via at least one coolant channel and an internal coolant feed line in the spindle. A sealing device with a throttling point is separated form parts of a drainage channel. The sealing device has at least one sealing ring enclosing the spindle. The sealing ring is longitudinally movable in the spindlehead housing coaxially with the spindle axis. After longitudinal movement into a sealing position, the sealing ring separates the internal coolant feed line from the associated parts of the drainage channel up to a specifiable leakage amount. The accuracy of machining with the tool may be increased and the installation space available can be better used.

Abstract: The invention relates to a spindlehead for tools which may be inserted into a tool disk with holders provided for this purpose and whose chucking means for spindle (10) holding the shank of the tool is rotatably mounted in a second section (26) adjacent to the first end section (12) receiving the tool shank, with a spindle bearing (14), and with a coolant feed (34) guided at least in part in the spindlehead housing (16), coolant transfer for the respective tool being effected by way of at least one coolant channel (40, 42, 44) which applies an internal coolant feed (34) for the respective tool by way of a sealing device (52) with throttling point separated from parts of a drainage channel (46, 48, 50) and the sealing device (52) having at least one seal (54, 56) which encloses the spindle (10).

Abstract: An adjustment and/or alignment arrangement positions a toolholder (10) relative to a toolholder mounting (12) in machine tools in a pivot movement. An adjustment part (30) cooperates with a setting part (32). The setting part (32) is provided with a mounting housing (40), in which, counter to the effect of an accumulator (34), a guiding part (36) for the adjustment part (30) is guided longitudinally slidably. The guiding part (36) can be controlled by an operation part (38). The adjustment and/or alignment arrangement is of simple construction, and consequently, is of low cost, while to a great extent facilitates the desired adjustment simply and operationally securely.

Abstract: A valve is placed between two relatively movable parts, especially to control coolant flow in a tool turret. One part has a valve housing and a movable valve body within valve housing. The valve body has a sealing surface and a discharge opening, opening into the sealing surface. The other part has a valve seat with a seat surface and a valve passage opening into the seat surface. At least a portion of the area of the sealing surface lying adjacent to the discharge opening in the direction of movement of the two parts is of greater dimensions than the diameter of the valve passage. The valve has a wiper.