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Properties Unit DYD-11-033 DYD-11-051 Note
Gear ratio - 33 51 -
Repeatable peak torque Nm 8.5 17.0 -
Rated output torque
(@2,000 rpm)
Nm 2.2 3.5 -
Maximum input speed rpm 6,000 6,000 -
Average input speed rpm 2,000 2,000 -
Moment of intertia X10-4 kgm^2 0.022 0.024 -
Backlash arcmin <3.0 <3.0 -
Lost motion arcmin <3.0 <3.0 -
Torsional stiffness Nm/arcmin 1.0 1.0 -
Efficiency(@2,000 rpm, 20 ℃) % 50 50 -
Starting torque cNm 20 20 -
Back-Drive torque Nm 1.0 1.0 -
Service life hours 3,000 3,000 -
Dimension mm 43 X 43 X 23.65 43 X 43 X 23.65 -
Weight g 196 196 -

NOTE: The specification and figures in the list are subject to update for the continuous product performance improvement.


  • Please verify product’s model and number to ensure correct shipment of the product ordered.
  • Please verify all components are included in original packaging.
  • Please verify to see if there might be any damage on the product’s surface or general appearance.

(May cause injury or damage to product)

  • Do not disassemble or reassemble the product. If the product is disassembled and reassembled, the original performance cannot be guaranteed.
  • Be careful not to apply a load more than the instantaneous permissible torque.
  • Do not use the product when it is dropped or subjected to strong impact.
  • Please familiarize yourself with the contents of the manual before using the product. If the product is operated without correct assembly, it may cause vibration, shortened life, and/or permanent damage.
  • Use at an ambient temperature of -5° to 55° degrees Celsius.
  • Do not operate the product in an environment exposed to water, oil or explosive gas.
  • Exercise caution to the internal components are not exposed to dust and chips.
  • High quality oil seals are applied to the input/output shaft, however the product is subject to leakage. Please provide oil protection treatment as needed according to your application.
  • This product is coated with anti-rust treatment at the time of shipment, however rust may appear depending on storage and environmental conditions.
  • This product is coated with surface treatment, however rust protection is not guaranteed.
  • This product is pre-packed with lubricant, do not mix with other lubricants.
  • Please follow local government guidelines when disposing of the lubricant.


  • Avoid coming into contact with the lubricant as this may cause irritation when in contact with your skin and eyes.
  • In the case your eyes come in contact with the lubricant, wash your eyes immediately with clean water and seek medical advice.
  • In the case your skin comes into contact with the lubricant, wash your skin thoroughly with water and soap.


  • This product is covered under warranty for 1 year after purchase or up to 2,000 hours of operational time. (* Product must be used under normal operating conditions)
  • If there are any issues due to a manufacturing defect within the warranty period, we will repair or replace the product.
  • Warranty will be void if the product is used or handled improperly by user.
  • Warranty will be void if the product is repaired or modified in any way.
  • Warranty will be void if the product is damaged by any external components (ie. motor)
  • Warranty will be void in the case the product is affected by natural disasters and/or uncontrollable circumstances.
  • ROBOTIS is not responsible for any damages or injuries that may occur by the failure of the product mid operation.


The efficiency of the DYD can be affected by the temperature and the input speed. Please refer to the graph below for the input speed and the output torque efficiency.

Graph of Efficiency Characteristics for DYD-11, Operating Enviroment : Temperature 22 ° (71.6°F), Humidity 55%


Drawings for DYD-11

Compatibility and Options

Higher ratio reduction(additional planetary gear, PG option)

Additional planetary gears(PG) with various reduction ratio can be attached in order to use higher speed motors.

PG Option

DYD gear ratio 33 - - - 51 - - -
PG gear ratio 3 4 5 7 3 4 5 7
Total gear ratio 99 132 165 231 153 204 255 357

Input shaft options

Various input shaft options can be selected with the DYD.

Option Type - C Type - D Type - SC
Name Clamp-ring D-Cut Set-screw

NOTE: Refer to the input shaft option type provided with the each DYD.

DYD-11 DYD-14 DYD-17
Type-SC Type - C Type - C


Assembly Tolerance

See the dimension and the geometric tolerances of the input, output and the housing when applying DYD on the system.

Assembly Tolerance

Assembly example of PG option

The PG option that provides high ratio reduction, requires a bracket to attach the motor to the apparatus. The bracket for a motor is not provided.

Assembly Example for PG option