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The QR Series Posi-Tork® Rotary Actuators are completely self-contained, electro-mechanical devices. Designed and fabricated for dependable, long-life operation, these actuators are used for positioning, automation of material handling or flow control equipment. Series QR Posi-Tork Actuators are driven by a high-starting torque, low inertia motor. The motor rotates the output drive sleeve through a worm gear set and single reduction spur gearing. Upon completion of travel, the gear driven position limit switch interrupts power to the motor.
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Features
- Adjustable Position Limit Switch. A two position gear driven limit switch for end of travel actuator shut-off is included as standard. Each position is independently adjustable and can be set anywhere within the full actuator travel. The heavy duty rotary drum, double break switch with wiping contacts, features a patented mechanism that ensures internal gear engagement after adjustment.
- Weatherproof and/or Dust-ignition proof (Class II, Division 1 & 2, Groups E, F and G).
- Anti-friction bearings throughout, including the output drive sleeve.
- Torque limit disc springs and spring limit sleeve to prevent total spring deflection.
- Non-backdriving high strength worm gear set.
- Adjustable Torque Limit Switch. An adjustable torque switch for each direction of travel is provided as standard. The switch assembly will automatically shut-off the actuator if the set torque is exceeded. The switch protects driven equipment from damage due to excessive torque and can also be used as a mechanism for positive seating.
- High strength alloy steel cut gears.
- Heavy duty motor, TENV, NEMA D design, high-starting torque, low-inertia motor provides high breakaway torque and good positioning characteristics. Class F insulation is standard.
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