The midsole (10) is formed with a vertical through-groove (11), a horizontal through-groove (11), or a cross through-groove (11).

The protruding block (12) has a through groove.

A through groove (121) is provided in the base (12).

The bearing is fixedly mounted in the through groove.

From the rear side, the cross bar is provided with a longitudinal through groove.

A through-groove (13) is formed in the inner peripheral surface of the bearing housing (12), and engagement grooves (20) are formed in the through-groove (13) by a stationary member (16).

The invention relates to a measuring device (60) for angles (α) on machined edges or apexes (48) of a workpiece (28), comprising a continuous groove (26) for receiving an edge or an apex (48).

The cutting edge (2) consisting of a chip independent from the body section (1) and having a dimension equal to the circumferential dimension of the through groove (3) is inserted into the through groove (3) and fixed in place.

The heat-absorbing member (111) of the heat pipe (11) is held in the through groove (121) by pressing.

The transition portion of transmission shaft (1) is passed though the through groove of the protruding block (12).

The first pipe line extends through the rotatable shaft and is communicated with the through groove, and the second pipe line extends through the bearing base body and is communicated with the through groove.

The oil filling pipe line is communicated with the through groove by the oil flowing hole.

The rotatable shaft rotatably extends through the bearing and the through groove and into the vacuum chamber.

A damper pulling sheet (12) is mounted in a radial through groove (10-4) of the fixed base (1).

According to the invention, the sleeve (1) is elastically configured by means of a radially extending continuous slot and engulfed by a wound flat spiral spring (10).