Nexen Group (United States) - Motor/gearbox-ready, IP65-rated, for precision rotary indexing applications.

Nexen Group, Inc. introduces the Motor Ready Sealed (MRS) precision rotary indexer. The MRS maintains the benefits of the company’s existing patented precision roller pinion drive design – zero backlash, high precision, high torque, and high acceleration – while delivering significant new benefits. It is ideal for precision rotary indexing applications such as machine tools, semiconductor fabrication, robotics, automated welding, medical packaging, assembly and cutting systems.

A high roller pinion-to-gear ratio allows users to direct drive the system with the addition of a servo motor, eliminating the cost of a reducer. This also reduces engineering and installation time. For high load applications, the customer can drive the system with a reducer/motor combination. Additionally, the gear-to-pinion reaction loads are fully supported so the servo motor shaft is not subjected to radial loading, which eliminates the need for costly high output capacity reducers in high load applications. All of these features reduce engineering and installation time.

The MRS precision rotary indexer offers high indexing precision, with one-way positional accuracy up to ± 31 arcsec and one-way repeatability up to ± 5.2 arcsec. Unlike other drive systems, there is zero backlash from the motor through the driven load. Acceleration is up to twice as fast as other technologies. The MRS can handle high speeds up to 304 rpm. For faster installation, it is motor/gearbox ready. Available in sizes of 150, 250 and 350 mm output bolt circle diameter, it has a large open center to optimize performance in small spaces. The MRS is fully sealed and IP65 rated. It is of low maintenance and has a long service life.

Apart from rotary indexers, Nexen produces roller pinion systems, industrial brakes, clutches, torque limiters, overload protection devices and control systems. The company holds 120 US and international patents. Headquartered in the USA and with the European office based in Wemmel in Belgium, Nexen products are available from over 40 sales offices and more than 1,500 distributor outlets worldwide.

Summary of features:

• High indexing precision: one-way positional accuracy up to ± 31 arcsec and one-way repeatability up to ± 5.2 arcsec
• Zero backlash from the motor through the driven load
• Acceleration up to twice as fast as other technologies
• High speed up to 304 rpm
• Motor/gearbox ready for faster installation
• 150, 250, 350 mm output bolt circle diameter
• Large open center to optimize performance in small spaces
• Fully sealed, IP65 rated
• Low maintenance and long life

Image Caption:

The new precision rotary indexer MRS from Nexen is ideal for precision rotary indexing applications.