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Model RK
Rack-Pinion Linear Actuator

The RK Series is a rack and pinion driven unit featuring dual SHS20 linear guides mounted on a high-rigidity 100×200mm aluminum extrusion base. It achieves long stroke and high-speed operation, with multi-slider configuration capabilities. Standard cable carrier options are included. Assembled at our U.S. facility to meet short delivery requirements. Optimally designed as a traveling base for small to medium-sized robots, supporting a wide range of applications.

Model RK

Precautions on Use

RK Linear Actuator

The RK Series features dual SHS20 guides on a 100×200mm aluminum extrusion base with rack and pinion drive. Achieves long stroke, high-speed operation, and multi-slider capability. Includes standard cable carriers. U.S.-assembled for quick delivery. Ideal for small to medium robot applications.

Cobot RTU

Designed specifically for RTU integration with cobot sizes ranging from FANUC CRX5 to CRX10L, the RK linear actuator employs a ground rack mechanism to deliver quiet, reliable operation.

Tools

2D/3D CAD

RK Download 2D&3D-CAD

Features

Structure

Combining a caged ball LM Guide with a robust aluminum base, the RK linear actuator offers versatility across numerous applications through optional configurations such as a cable track, bellows cover, gearbox, and sensors.

Ball screw type
Structure of Model RK

Optimal for Long Stroke High Speed Conveyance

A maximum stroke of 4350 mm* is possible due to the rack-pinion drive method.
A maximum travel speed of 3400 mm/s is possible when an AC servomotor.

  • *

    Stroke between the mechanical stoppers

Maximum Travel Speed
Unit: mm/s
Model no. RK20
Reduction ratio 1/3 1/5 1/9
Maximum travel speed 3400 1500 833
Table Travel Distance per Pulley Rotation
Pitch circle diameter of the Pinion [mm] Table travel distance per pulley rotation [mm] Table travel distance [mm] per motor rotation
Reduction ratio: 1/3 Reduction ratio: 1/5 Reduction ratio: 1/9
47.75 150 50 30 16.67

Long Service Life and Long Term Maintenance-Free Operation

Built-in Caged Ball LM Guide model SHS.
Long service life and long term maintenance-free operation are possible because there is no mutual friction between the balls and grease retention is improved due to the effect of the caged ball.

QZ Lubricator is availabe as option.
The QZ Lubricator supplies an optimal amount of lubricant to the raceway of the LM rail, substantially extending maintenance intervals.

* For Model TY, the QZ Lubricator is equipped on a single side only for each LM block.

Robust Structure

Base geometrical moment of inertia IX[mm4] 8.86 × 106
IY[mm4] 2.95 × 107
Mass [kg/m] 19.9