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Mori Seiki Co., Ltd. introduces an additional lineup of high-speed, high-precision, rotary table DDRT

(Direct Drive Rotary Table) including DDRT-200 with 200 mm table diameter, DDRT-300 with 300 mm

table diameter, and DDRT-400 with 400 mm table diameter. Collectively with the DDRT-260 (260 mm

table diameter), which began accepting orders in June 2008, Mori Seiki provides a full lineup with four total

models.

The DDRT is equipped with the DDM (Direct Drive Motor)*1 instead of worm gears. The DDM offers

high-speed feed by transmitting the drive power directly without using gears, so it achieves zero backlash.

As a result, surface quality for curved machining has dramatically improved. The transmission efficiency

has improved immensely so the power consumption of the motor reduces to 30%*2 of the conventional gear

drive system, greatly contributing to energy saving. Since there are fewer drive and rotating parts that

can wear out, such as gears, it requires less maintenance.

Additionally, the cable used to get damaged by cutting chips because the cable connecting the machine

and the rotary table was located inside of machine. As an improvement to our vertical machining center

interface, we achieved an in-machine cable-less connection.

From the extensive lineup, customers can choose DDRTs with high reliability based on their workpiece

size needs.

Mori Seiki will continue to enhance and introduce a wide range of products in order to meet each and

every customer’s production requirements.