The Model 858 Size 58 Encoder is a heavy duty, stainless steel, extremely rugged, reliable, yet compact European standard 58mm diameter encoder, designed for harsh factory and food industry environments. Shaft loading is no problem for the double-shielded ball bearings; their 36Kg load rating ensures a long operating life. With the optional heavy-duty shaft seal, the Model 858 is rated IP65. Two European standard mounting options are available: Clamping Flange (420 Type) or Synchro Flange (426 Type). The Model 858 is the perfect replacement encoder for food industry, wash-down or marine environments.