brake, clutch, industrial brake, industrial clutch, pilot mount clutch, pneumatic clutch brake, rod lock, roller pinion, torque limiters, tension control 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.