Sumitomo Cyclo FAS35-119 Precision Cycloidal Gear Reducer

The Sumitomo Cyclo FAS35-119 is a precision cycloidal gear reducer from the distinguished FAS series, engineered for point to point positioning applications in industrial automation systems. This gear reducer implements the renowned Cyclo drive principle, which uses a cycloidal disc mechanism to achieve high reduction ratios with exceptional efficiency and zero mechanical backlash. The FAS35-119 represents Sumitomo Drive Technologies commitment to delivering precision motion control components that combine compact dimensions with superior torque transmission capabilities for demanding automation environments.

Cycloidal Drive Technology

The Cyclo drive principle differentiates these gear reducers from conventional involute gear systems through the use of cycloidal discs that roll within ring gear housing, distributing load across multiple contact points rather than concentrating stress on individual gear teeth. This design approach eliminates the backlash typically found in traditional gear trains, providing lost motion of less than 1 arcminute for precise positioning accuracy. The FAS series implements a three-disc system that further improves load distribution while maintaining compact envelope dimensions. The mechanical design operates without backlash throughout the working life, as there are no components requiring adjustment to maintain contact between drive elements.

Performance Specifications

The FAS35-119 provides a reduction ratio of 119:1, enabling high torque multiplication from relatively small input motors. The gear system accommodates input speeds up to 6150 revolutions per minute while maintaining smooth operation and low vibration characteristics. The FAS series gear reducers achieve high torsional stiffness ratings, transmitting torque with minimal angular deflection between input and output shafts. This stiffness characteristic is essential for positioning applications where the relationship between motor rotation and load position must be maintained within tight tolerances. The design incorporates high capacity bearings that support substantial overhung and axial loads, enabling the gear reducer to withstand real-world application forces without premature wear or failure.

Construction and Mounting Configurations

The FAS35-119 offers versatile mounting options compatible with standard industrial motors through intermediate flange connections that accommodate various motor frame sizes. The housing is precision machined from high-strength materials to maintain alignment of internal components while resisting deformation under torque loading. Motor connection is accomplished through shaft coupling arrangements, with optional keyless clamping ring designs available for applications requiring simplified assembly or reduced axial length. The gear reducer can be configured in multiple mounting orientations including foot mounted, flange mounted, or shaft mounted configurations, adapting to different equipment layouts and space constraints. Grease lubrication is provided for life, eliminating the need for periodic oil changes and reducing maintenance requirements over the operational lifetime.

Application Environments

The FAS35-119 is engineered for industrial environments where reliability and positioning accuracy are paramount. Material handling applications benefit from the zero backlash performance when positioning carriages, lifting mechanisms, and conveyor diverters. Robotic systems utilize the high torsional stiffness to maintain end effector positioning accuracy during complex motion sequences. Automation equipment requiring precise indexing, repetitive positioning, or synchronized motion between axes achieves consistent results with the Cyclo drive principle. The gear reducer withstands the shock loads and acceleration forces encountered in automated machinery, with high momentary torque capacity protecting against damage during overload events. The sealed construction retains lubricant while excluding contaminants, enabling reliable operation in dusty or wet industrial environments.