Nexen Group, Inc. is a leading manufacturer of precision motion control components, power transmission and web tension control products for a wide array of industrial applications. Products include high precision linear and rotary systems, linear locking components, pneumatic brakes and clutches, torque limiters and electronic tension controls.
Precision Roller Pinion System
This unique drive system provides very high positional accuracy, near-zero backlash, virtually no cumulative error, low-velocity ripple, unlimited length, very high speeds, high rigidity, low noise, low (in some cases no) maintenance, corrosion resistance, long life, and 99% efficiency. This opens up new machine design possibilities and provides the capability to achieve much higher levels of performance.
HIGH SPEEDS. – 11 m/s (36 ft./sec.)
INCREDIBLE ACCURACY. – ±30um (±0.00118 in.)
Roller Pinion Systems
Nexen’s RB Series of linear profile guide rail brakes uses spring force to secure the load in holding applications. Superior response time, high force for stopping, and holding in e-stop and power-off situations. Each RB brake clamps directly onto the center of the guide rail to provide positive braking and holding in all axes, with no effect on bearing surfaces. These profile rail brakes hold position accurately by reducing drive train backlash and elasticity.
Nexen’s Static Rod Locks deliver precision holding with virtually no backlash, providing high accuracy in demanding applications. These spring-engaged, air-released units come in both ISO and NFPA sizes. The Rod Lock’s large clamping surface ensures high clamping/holding force and Nexen offers models for use on a pneumatic cylinder or as a stand-alone unit on a guide rod. The design is sealed and features a natural brushed aluminum finish or a corrosion-resistant, anodized finish.
Servo Motor Brakes
Spring engaged, air released servo motor brakes mount to the shaft end of servo motors up to 20 horsepower. The brake acts as an adapter between dissimilar mounting features. The brake bore accepts the motor shaft that is fixed inside the brake with a split hub/shaft collar. This brake is a high-torque, zero backlash device.
Ball Screw Brakes
Ball Screw brakes provide reliable holding in a compact package. During a power loss the motor has no holding torque allowing the ball screw to back drive and the load to drop. Ball screw brakes connect to the machined end of the ball screw to prevent back driving, load drops and equipment damage during a power loss. Holding force up to 125 Nm (1100 in-lbs.)
Linear Couplings Provide Zero Backlash Misalignment Control Between Linear Actuators Like Linear Motors, Ballscrew Actuators, Pneumatic Cylinders, And Rods Or Sensors They Drive To Prevent Binding Or Premature Wear.
Harmonic Gearheads offer true zero backlash, high reduction ratios of 50/80/100/120:1, and high load capacity in a very compact package. They utilize the best cross roller bearing technology for the highest rigidity and load capacities. They are available in ISO9409 flange mount or with an integrated RPS pinion. The integrated pinion models offer the ultimate in RPS system performance and simplify installation.
Roller Pinion Gear System
The Roller Pinion Gear System (RPG) is based on an innovative pinion consisting of bearing-supported rollers and a unique tooth profile. This unique drive system provides very high positional accuracy, near-zero backlash, virtually no cumulative error, low-velocity ripple, unlimited length, very high speeds, high rigidity, low noise, low maintenance, corrosion resistance, long life, and 99% efficiency. This opens up new machine design possibilities and provides the capability to achieve much higher levels of performance.
Precision Ring Drive Indexer
The Precision Ring Drive (PRD) combines Nexen’s innovative Roller Pinion System (RPS) technology with a precision-grade bearing and gearhead, it takes indexing or rotary positioning systems to a higher level of performance, providing unmatched positional accuracy, high rigidity and acceleration, low maintenance, and long life. The Nexen PRD is ultra-efficient and very quiet at moderate speeds. In addition, the PRD can produce accelerations up to twice as high as similar indexing technologies, providing more productivity.
Nexen’s I-300 brake is designed for zero backlash holding and emergency stopping making it ideal for indexers and positioning systems. The spring engaged, air released, patented braking element locks and holds the shaft in position without any displacement or reversing of the load. It is flange or shaft mounted and has a keyless compression bushing shaft connection for easy installation and IP67 rated when flange mounted.