Index table

摘要

There is provided a built-in type index table in which a power transmitting means scarcely has backlash and, at the same time, the space and cost can be saved. The index table includes a rotary table (41) for setting a workpiece (2) for a machine tool; a rotary table shaft (42) fixedly provided on the rotary table; a driving motor mechanism (10), which is a driving source; and a planetary roller speed-reduction mechanism (20) having a sun roller (21), which is a motor output shaft of the driving motor mechanism, a ring (22) fixed to the speed-reduction mechanism, a plurality of planetary rollers (25) arranged at equal angular intervals between the sun roller and the ring in a pressurized state, and a planetary roller harness (24) that fixedly supports a plurality of planetary roller shafts pivotally supporting the planetary rollers in a rotatable manner and is fixedly provided coaxially with the rotary table shaft.