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Frequently Asked Questions

What is the core feature of the ROTEX GS series coupling?

Zero-backlash elastomeric coupling. The straight-tooth elastomer is installed under pre-pressure for improved system stiffness; elastic teeth compensate for mounting errors; radial web support prevents excessive deformation during high-speed/high-acceleration rotation, ensuring long-term stable operation.

How many elastomer hardnesses does the GS series offer, and how to select?

Five color-coded elastomers: Blue 80 Sh, Yellow 92 Sh, Red 98 Sh (polyurethane), Green 64 Sh (Hytrel), Grey-green 64 Sh (polyurethane). Select by required torsional stiffness, vibration damping, and operating temperature.

What are typical applications for the GS series coupling?

Electronic measurement system drives, electronic measurement and control system drives, positioning drives, spindle drives, machine tool spindles, planetary gear/feed drives, high-load high-torsional-stiffness applications, and high-ambient-temperature/hydrolysis-resistant conditions (D-GS grey-green).

Which GS elastomer should I use for a high-temperature, moisture-exposed environment?

Use the D-GS grey-green 64 Sh polyurethane (or D-H-GS green Hytrel for hydrolysis resistance). These are rated for high ambient temperature and are hydrolysis-resistant.

Does the GS series have zero backlash?

Yes. The GS series is a zero-backlash elastomeric coupling - the straight-tooth elastomer is pre-compressed for high system stiffness, making it suitable for precision positioning and spindle drives.