HS35 Optical Rotary Encoders

HS35 Optical Rotary Encoders

BEI Sensors' HS35 rotary encoders from BEI Sensors accommodate shafts up to 1" in diameter and can be mounted on smaller diameter shafts with optional insulating inserts. These encoders are designed for either a through shaft mounting or blind shaft mounting with a closed cover to maintain their environmental ratings. The HS35 is offered in incremental or absolute versions. The incremental model is available with a dual output option to provide redundant encoder signals, dual resolutions or to supply two separate controllers. The absolute HS35 encoder is available with various output options including gray code and natural binary. Applications include motor feedback and vector control, printing industries, robotic control, oil service industries, and web process control.

Mechanical Specifications - Incremental Mechanical Specifications - Absolute
  • Shaft diameter: 3/8" (1/2" as special feature)
  • Flat on shaft: 3/8" shaft: 0.80" long X 0.03" deep; 1/2" shaft: 0.80 long X 0.04" deep (1/2" shaft with flat must be ordered as special feature)
  • Shaft loading: 3/8" shaft: up to 40 pounds axial and 35 pounds radial; 1/2" shaft: up to 90 pounds axial and 80 pounds radial
  • Shaft runout: 0.0005 T.I.R. at midpoint, regardless of shaft diameter
  • Starting torque at 25°C: without shaft seal 1.0 in-oz (max.); with shaft seal 2.5 in-oz (max.); 1/2" shaft with shaft seal: 3.5 in-oz (max.)
  • Bearings: Class ABEC 7 standard, ABEC 5 for 1/2" shaft
  • Shaft material: 416 stainless steel
  • Bearing housing: die cast aluminum with protective finish; stainless steel (special feature)
  • Cover: die cast aluminum; stainless steel (special feature)
  • Bearing life: 2 X 108 revs (1300 hrs. at 2500 RPM) at rated load 1 X 1010 revs (67,000 hrs. at 2500 RPM) at 10% of rated load
  • Shaft bore: many diameters from 0.375 to 1.000 inch are available, including metric
  • Allowable misalignment: 0.005” T.I.R. on mating shaft 0.75" from shaft end
  • Bore runout: 0.001 T.I.R. maximum
  • Starting torque at 25°C: Through shaft version (SS) = 7 in-oz (max);
  • Bearings: 52100 SAE High carbon steel
  • Bearing housing: die cast aluminum with protective finish; stainless steel (special feature)
  • Cover: die cast aluminum; stainless steel (special feature)
  • Bearing life: 7.5 X 109 revs (50,000 hours at 2500 RPM) 2 X 108 revs (1300 hrs. at 2500 RPM) at rated load 1 X 1010 revs (67,000 hrs. at 2500 RPM) at 10% of rated load 
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