A Mechanical Solution for
Linear Motion
Eliminate complex control systems from linear motion applications
Amacoil/Uhing Rolling Ring Drives & Assemblies
For reciprocating and indexing linear motion.
Drive units sold separately or in production assemblies ready for machine-mounting.
RG Reciprocating
Linear Drives
Model RG drives provide smooth, automatically reciprocating linear motion. Mechanical control over linear pitch and reversal eliminate the need for a complex electronic control system.
RS Positioning
Linear Drives
Model RS drives offer backlash-free linear motion even during reversal. The drive nut runs on a smooth shaft with no threads to clog or jam.
Easylock™ & U-Clip
Shaft Collars
Fast acting clamping systems for rolls, spools and other static or driven shaft applications. Easy to use and install, clamps are available in two different styles to meet application requirements.
Custom Engineered Linear Drive Assemblies
Model ARG and ARS drive assemblies are furnished ready for machine-mounting including drive unit, shaft, rails, end stops, and a variety of other options.
See How It Works
In a rolling ring drive the inner race of the bearing is specially machined. The bearings are then mounted in a housing which is placed on a smooth, threadless shaft. Each rolling ring bearing contacts the shaft on a single point. The bearings may be pivoted left or right on the shaft. When the rolling rings are angled on the shaft, and the shaft is rotated, compression is generated against the machined inner race causing the bearings to roll along the length of the shaft. The rotary input motion provided by the motor-driven shaft is thereby converted to linear output. The angle of the rolling rings relative to the shaft determines travel direction and linear pitch (distance traveled per shaft revolution).
News & Articles
Just Rolling Along with Rolling Ring Linear Drives
Multi-speed, direct braked reversible motors. Valves and solenoids. Gear head assemblies. PLCs and other complex controls. Whether you design, operate, or maintain production machinery, you're probably familiar with the components and assemblies typically associated with linear drive systems. It's likely...
Compression and Friction in a Linear Motion System
In most linear motion applications, compression and friction within the drive train, while often necessary, are ultimately detrimental to the linear motion system. Compression and friction cause heat and wear. This shortens the system's lifespan and increases maintenance requirements and costs.
Precision linear motion drive features thrust capacity from 7 to 800 pounds
The Precision Motion Drive System is a Model RG rolling ring linear drive integrated with a motion controller for precision linear motion applications. The Precision Motion Drive is fully programmable and meets application requirements for precision winding/spooling, pick-and-place machines, X-Y coordinate...
Linear Drive Applications
Rolling ring drives and assemblies are used in machinery requiring a backlash-free linear motion component to perform a wide range of positioning and reciprocating motion applications.