Discover causes of bearing electrical erosion in VFD motors: shaft voltage, fluting patterns, EDM damage. Learn prevention with insulated coated bearings.
Download the 2026 TFL Product Catalog to see specifications for our insulated deep groove ball bearings and cylindrical roller bearings, featuring advanced plasma spray coating technology.
Is your “insulated” bearing just a piece of painted steel? This guide reveals the critical differences between cheap spray paint and real plasma ceramic, teaching you 4 simple methods to spot counterfeit insulated bearings before they destroy your equipment.
While shaft grounding rings provide a low-impedance path for common-mode currents, this guide explains why pairing them with electrically insulated bearings is necessary to fully prevent premature failure in VFD-driven motors.
This technical guide explains the physics behind electrical bearing damage, focusing on how bearing capacitance and impedance allow high-frequency VFD currents to couple across the lubricant film. It covers the mechanisms of EDM, fluting, and how to select the right mitigation strategies like insulated bearings.
This guide outlines the essential procedure for testing insulation resistance in electric bearings to verify protection against damaging shaft currents. It covers necessary equipment, step-by-step testing methods, and how to interpret results to ensure long-term motor reliability.
This practical guide explores essential bearing insulation technologies, including plasma-sprayed ceramic coatings, hybrid ceramic designs, and polymer barriers. It details how these systems prevent Electrical Discharge Machining (EDM) damage in VFD motors and helps engineers select the optimal solution for reliability.
This guide explains the origins of shaft voltage in VFD applications, the risks of electrical erosion, and practical strategies—including grounding and insulation—to protect motor bearings.
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