This present disclosure relates to a device for rotary entrainment of a workpiece clamped between two tips, which is mounted on a machine table of a machine tool, consisting of a base body with a centrically arranged tip and a plurality of concentrically arranged, axially shiftable driver elements which for the rotary entrainment of the workpiece are pressed against or into an end-face surface, wherein an axial position of the driver elements can be defined by active fixation after a centering operation of the workpiece, and to a receptacle opposite the base body, for example a tip or hollow tip, which serves a guidance of an opposite side of the workpiece.

The utility model discloses a machining device having both a drill and a lathe. A handle (7) is fixed on the shell of the bench drill, a base (2) and a handle (7) of the bench drill are supported on the ground, a holding block (8) located on the left side of the crack lifting mechanism (5) is arranged on the guide rail (3), a tool rest & base assembly (9) is arranged on the top of the holding block (8); a support portion (10) is fixed on the top of the rocking lift mechanism, a tailstock assembly (11) is fixed on the top of the support portion (10), a tailstock spindle (12) is arranged in the tailstock assembly (11), a tailstock center (13) is inserted in the left port of the tailstock spindle (12), a tailstock hand wheel (14) is arranged on the right end of the tailstock assembly (11) for driving the tailstock spindle (12) to extent or retract, and a locking handle (15) for locking the tailstock spindle (12) is arranged on the tailstock assembly (11). The beneficial effects of the utility model are that: saving machining cost, drilling and shaping on a lathe, and suitable for machining manufacturers.

Surgical impact driver adaptors may be connected between a powered surgical instrument and a driven surgical device when performing surgical procedures, such as those involving the implantation of a surgical implant into bone, for example. During surgical procedures, the surgical impact driver adaptors may limit a transfer of a rotational force from the powered surgical instrument to the surgical device until a sufficient axial force is applied to the impact driver adaptor from the powered surgical instrument.

An adjustable lathe mounting system for turning a work piece on a rotating lathe having a lathe bed, headstock, and a headstock spindle, where the work piece is attached to the headstock spindle. The lathe mounting system includes an adjustable base releasably attached to the slotted way of the bed via a locking plate and a pair of laterally adjustable way spacers moveable within a laterally extending slot that engage each side of the slotted way.

An adjustable lathe mounting system for turning a work piece on a rotating lathe having a lathe bed, headstock, and a headstock spindle, where the work piece is attached to the headstock spindle. The lathe mounting system includes an adjustable base releasably attached to the slotted way of the bed via a locking plate and a pair of laterally adjustable way spacers moveable within a laterally extending slot that engage each side of the slotted way.

A tailstock device includes a lower transport unit, a base seat, and a tool unit. The lower transport unit includes a lower transmission mechanism that has a lower leadscrew adapted to be rotatably installed on a bed of a lathe machine and extending in a lengthwise direction. The base seat threadedly engages the lower leadscrew and is driven movably by the transport unit along the lower leadscrew. The tool unit is mounted on the base seat, is movable relative to the base seat in a crosswise direction transverse to the lengthwise direction, and has a lathe center adapted to point toward a headstock of the lathe machine and a carriage adapted to be mounted with a deep-hole drilling tool. The carriage and the lathe center are arranged in the crosswise direction.

A tailstock device includes a lower transport unit, a base seat, and a tool unit. The lower transport unit includes a lower transmission mechanism that has a lower leadscrew adapted to be rotatably installed on a bed of a lathe machine and extending in a lengthwise direction. The base seat threadedly engages the lower leadscrew and is driven movably by the transport unit along the lower leadscrew. The tool unit is mounted on the base seat, is movable relative to the base seat in a crosswise direction transverse to the lengthwise direction, and has a lathe center adapted to point toward a headstock of the lathe machine and a carriage adapted to be mounted with a deep-hole drilling tool. The carriage and the lathe center are arranged in the crosswise direction.

A work piece support rest is provided for turning a work piece on a rotating lathe having a lathe bed, headstock, and a headstock spindle, where the work piece is attached to the headstock spindle. The support rest includes an adjustable base releasably attached to the slotted way of the bed via a locking plate and a pair of laterally adjustable way spacers moveable within a laterally extending slot that engage each side of the slotted way. A multi-piece outer ring is releasably attached to the adjustable base. A plurality of roller slides are releasably and adjustably attached to the outer ring, such that each of the roller slides extends radially inwardly and has a roller disposed at an inward distal end thereof for supporting the work piece.

A tailstock control device includes a tailstock parameter setting unit that receives, in advance, setting of tailstock acceleration time ta, tailstock movement velocity V, drive torque measuring period t, and number n of drive torque measurements; a calculating unit that calculates acceleration zone distance La from the acceleration time ta and the movement velocity V; a calculating unit that calculates constant velocity zone distance Lb from the movement velocity V, the measuring period t, and the number n of measurements; a drive torque detecting unit that detects servo motor drive torque; and a control unit that sets La+Lb as drive torque measuring distance Lt and calculates servo motor drive torque limit value c from drive torque T detected by the drive torque detecting unit when the tailstock is moved over La+Lb and also from a servo motor torque command value a required for supporting a workpiece.

A tailstock control device includes a tailstock parameter setting unit that receives, in advance, setting of tailstock acceleration time ta, tailstock movement velocity V, drive torque measuring period t, and number n of drive torque measurements; a calculating unit that calculates acceleration zone distance La from the acceleration time ta and the movement velocity V; a calculating unit that calculates constant velocity zone distance Lb from the movement velocity V, the measuring period t, and the number n of measurements; a drive torque detecting unit that detects servo motor drive torque; and a control unit that sets La+Lb as drive torque measuring distance Lt and calculates servo motor drive torque limit value c from drive torque T detected by the drive torque detecting unit when the tailstock is moved over La+Lb and also from a servo motor torque command value a required for supporting a workpiece.