NKE electrically insulated rolling bearings reliably prevent current discharge. Three versions are available:
- Bearings with oxide ceramic insulating layers on outer ring (SQ77) or inner ring (SQ77E) – Applied with plasma technology, the insulation has a guaranteed dielectric strength of at least 1000 V AC or DC.
- SQ77B (hybrid bearing): Rolling bearing with oxide ceramic rolling elements. Resistance of insulation theoretically ∞.
Range
- SQ77 (insulated outer ring)
Cylindrical roller bearings - Design variants: NJ, NU, NUP; Dimension series: 210-230, 310-330; Cages: brass and polyamide; Radial clearance groups: C0, C3, C4
Deep groove ball bearings - Dimension series: 6212-6226; 6312-6326; Cages: brass; Radial clearance groups: C3, C4 - Other types and SQ77E (insulated inner ring) as well as SQ77B (hybrid) upon request
Advantages
- Higher operational reliability through optimum protection against electrical corrosion
- More economic than, for example, insulation on housings or shafts
- Interchangeable: Same key dimensions and technical properties as conventional bearings
- Coating resistant to damage if correctly handled
Typical applications
- Electric motors, generators, etc.
[ Download production information, PDF, 1MB ]
