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R20 Shaft Encoder


Features and Options:

  • Shaft size from 0.250" to 0.375"
  • Metric shaft size from 4mm to 8mm
  • Unbreakable code disk
  • Resolution up 1200 PPR
  • Servo ring and face mount options
  • IP66 environmental seal option
  • Enhanced anti-jitter option
  • USAMade in the USA



Product Description

The model R20 is an optical shaft encoder in a 2" diameter x 1-3/4" long housing that can be face mounted using three 6-32 x .25" deep mounting holes on a 1.75" diameter bolt circle. The shaft is up to 3/8" diameter, either single or double ended. Electrical connection is through a 16mm circular connector or an attached cable.

Industry Use

Conveyor Manufacturers Medical Printing and Labeling Custom Machine Builders
Packaging Robotics Material Handling Aerospace
Automated Scales Lumber    

Product Documentation

Additional Information

View FileDatasheet
View FileDrawings

Shaft Options
Output Types
Pulses per Revolution Options
Anti-Jitter Option
Supply Voltage Options
Output Circuits

Modified Versions

Modification Description  
M131 Encoder with M12 4-pin connector (Not reccomended.  Use S3 for connector termination) View FileDatasheet
M139 Single output encoder with Enhanced Anti-Jitter feature View FileDatasheet
M187 Servo mount configuration with .687" diameter male pilot View FileDatasheet
M200 Multiple R20 encoders sharing a common shaft (call for information) View FileDatasheet
M203 Environmentally sealed R20 - IP66 View FileDatasheet
M212 R20 with 25mm dia x 10mm boss and 6mm dia x 10mm shaft, IP54 seals View FileDatasheet

For our programmable Shaft model, please see our R20-P Programmable Shaft Encoder. For our Hollow Shaft model, please see our HS20 Hollow Shaft Encoder.