We had an enquiry from a customer running an asynchronous motor who wanted a cost-effective feedback encoder, but was worried about shaft currents damaging the bearings over time, which is a common issue on VFD-driven motors.
Hengstler’s ICURO RI64 is a robust, economical hollow shaft (or hub shaft) incremental encoder built for exactly this. It has an insulated shaft that protects against inductive shaft currents, and it holds IP67 ingress protection even with the through hollow shaft design. It handles up to 4,096 lines, is highly resistant to impacts and vibrations, and is rated for a broad temperature range of -40°C to +100°C. Shaft options run from 10mm up to 16mm (hub shaft or through hollow shaft), with Push-Pull Complementary or RS422 interface, CE approval, and protection class IP64 or IP67. It is commonly used for feedback on asynchronous motors and general industrial applications.
From our experience, before we quote this, we would normally check the exact shaft diameter and type (hub or through hollow), the interface needed, and the IP rating required for your motor’s mounting environment. Hope this helps.
