Page 16 - Avtron Encoders Catalog
P. 16

Hollow Shaft Encoders




         HOLLOW SHAFT/TETHER MOUNTED                    HOLLOW SHAFT APPLICATION FIGURES
         Hollow shaft encoders fit over the shaft and
         clamp onto it. As the shaft rotates, so does the
         disk or rotor of the encoder. An anti-rotation   STUB                          BRAKE
                                                          SHAFT
         or torque arm prevents the housing from also                     Figure 1                      Figure 2
                                                                          Shaft mounted
         rotating. Avtron hollow-shaft encoders feature our          MOTOR  on totally           MOTOR  Shaft mounted
         Wide-Gap technology for shock and vibration                      enclosed fan                  outboard of disk
         resistance, enhanced with shatter-proof          FAN             cooled motor.                 brake.
         optical disks or chip-resistant magnetic rotors.  COVER
         HOLLOW SHAFT ADVANTAGES                                          Figure 3
           • No C-Face required                                           Shaft mounted   ENCODER   ROLL  Figure 4
           • No couplings to maintain                           MOTOR     on totally                    Shaft mounted
                                                                                                        encoder on
                                                                          enclosed
           • High tolerance of axial shaft movement                       non-ventilated                process roll.
           • No misalignment issues                                       motor.
           • Reduced installation costs
         STUB SHAFTS
         For hollow shaft mounted encoders, Nidec-Avtron
         has a complete selection of stub shafts to fit over
         50 different motor configurations.
         PROTECTIVE GUARDS
         Nidec-Avtron offers optional guards to protect the
         encoder from damage, or to provide finger safety
         when the encoder is not directly adjacent to the
         motor.
                                                        Stub shaft kits              Basket guard
         TORQUE ARMS AND TETHERS
         Nidec-Avtron offers threaded rod torque arms
         for heavier duty models to better handle the
         larger inertia; simple flat tethers are provided for
         smaller, lighter models.
         SELECTING HOLLOW SHAFT ENCODERS
         How do you select the best encoder for your
         application? Encoders on these pages range from
         Light, Mill Duty weighing less than 1 pound, to
         Explosion Protected, weighing over 17 pounds!

         To choose, consider the environment and
         application: the rougher the service environment,
         the more you need a durable, larger encoder to
         survive in these conditions.
         HELP ME CHOOSE
         Our web site has an expert system to select    Threaded rod torque arm
         encoders based on motor type and brand,
         application needs and much more.

         www.avtronencoders.com












                                                        Finger guard
          16
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