RollerDrive

Sankyo RollerDrive a constant lead cam with a servo motor drive for programmable motion. Our servo indexing tables provide fast, highly accurate motion, with the added capability to move medium to heavy loads. Our preloaded cam & turret provides a zero-backlash RollerDrive for all your automation needs.

Exclusive Zero-Backlash Structure

Features

No backlash
Rolling contact transfers power while eliminating wear
High accuracy and excellent efficiency
Preloadable for high rigidity

Product Line

MR Series (Ultra-compact model)

World's smallest zero-backlash positioner

Ultra small, zero-backlash positioner
Low maintenace : There is no deterioration in the precision of the internal parts due to aging, and the unit has excellent durability, there is no need for periodic calibration or adjustment.
There is a wide range of motors to choose : A wide range of servo and stepper motors can be installed.
Mounts in any position : The MR main housing can be mounted in any direction, allowing you to create various motions.

Applications

Aligment table

Turing and swiging arms

Handling unit

RGV Series (Standard model)

Zero-backlash positioner Standard model

Varied lineup of reduction ratios and sizes
Large output torque from a compact servo motor
Capable of handling heavy and uneven loads easily
Lightweight and compact

Applications

Index table

Work positioner

Turn table

RGR Series (Large-Diameter model)

Zero-backlash positioner Large-Diameter model

Large-diameter hole model with an open area of 30%
Improved freedom of wiring and piping design
Large output torque from a compact servo motor
Capable and handling heavy and uneven loads easily
Thin and lightweight body

Applications

Inspection machine
Assmbly machine
Work stocker

RA Series (Lightweight model)

Zero-backlash positioner Lightweight model

Highest level of accuracy in the RollerDrive series.
High speed
High Efficiency
Lightweight and compact body

Features

Backlash is eliminated entirely by maintaining constant contact between the wedge-shaped ribs on the input shaft and the roller followers under preload. Preload is adjusted by turning the adjustment mechanism on the input shaft.

The steel alloy input shaft is built to meet extremely tight tolerances using the latest in machining theory and equipment. These shafts are balanced to suppress self-excited vibration under high speed rotation.

Roller bearing construction transfers torque through the rolling action of the roller followers. Rolling contact maintains the initial accuracy, even for extended periods of use.

The output shaft has an oversized hollow bore that allows easy passage of wiring and piping, or the shaft of another device, allowing for design flexibility.

Inside the output unit, cross roller bearings are used for increased rigidity and minimal runout.

The motor shaft is rigidly clamped to the input shaft of the reducer for a direct transfer of power from the motor. The motor base is designed to absorb error in alignment during assembly (patent pending).

Applications

Settling time is instantaneous for precise positioning while speed variation during motion is minimal for accurate synchronized operation. The RollerDrive® is virtually maintenance free, resulting in a reduced cycle cost of the entire FA system.

The output shaft of the RollerDrive® has very minimal runout, which makes it suitable for precision θ-axis positioners and alignment tables. Its thin, compact design makes it ideal for X-Y stages and other positioning units as well.

Improved speed and reciprocating repeatability allows thin, profile drive layouts for compact integration, while piping and cables can easily be passed through the hollow bore in the large diameter output shaft

RU Series (High rigidity model)