Arranged between said two cylinder-roller or needle-roller rings (3) is a ball ring which rolls in a running groove (13) on the sleeve (2) and in a running groove (14) on the shaft (1).

The length of the load rolling-body rolling groove (31) is set 23-32 times the diameter of a rolling-body B.

A linear guide device having a load rolling-body rolling groove with an appropriate length capable of stably suppressing the passing vibration of rolling bodies.

A shaft part provided with a rolling groove in which rolling bodies roll, at least the inner surface of the rolling groove being hardened by induction hardening.

The invention relates to a window-opening pulley (1) comprising a raised projecting element (6) in the opening (7) which is disposed from the cable support to the single rolling groove (2) thereof.

For example, the curvature of the running groove is between 54% and 100%, and the ratio of the ball diameter with respect to the vertical shaft (2) is no greater than 20%.

The cross-sectional shape of the track groove has a Gothic arch shape towards the bottom of the track groove and an elliptical shape towards the opening of the track groove.

An annularly shaped second bearing ring is connected with the rotor portion of the wind turbine, and includes a second raceway groove aligned with the first raceway groove.

A lower deep groove ball bearing is mounted in a lower bearing mounting hole in the lower mounting base, and an upper deep groove ball bearing is mounted in an upper bearing mounting hole.

raceway runout with side of a ball bearing raceway groove

A plurality of rolling elements is rollably located in the groove and is in rolling contact with the inner surface of the outer race.

The track groove (22) of the outside joint member (23) and the track groove (25) of the inside joint member (26) are each inclined relative to an axis line.

If used as such, the ring member (1) has an annular groove (3) formed in the trajectory groove of the rolling bearing.

Provided are a deep groove ball bearing which exhibits low torque characteristics and has a sufficient basic dynamic rated load, and a method of designing the deep groove ball bearing.

Arranged between said two cylinder-roller or needle-roller rings (3) is a ball ring which rolls in a running groove (13) on the sleeve (2) and in a running groove (14) on the shaft (1).