A Dummy Motor is designed in such a way that it represents the axle size and shape of an actual motor but is a passive component as it is just used as a support for fixing un-powered wheels in the robot chassis. 

Technical Specification:

• Shaft size : 6mm
• Shaft material : plastic

Features:

• Plastic Nut on shaft for easy mounting
• Supports the chassis in absence of the  motor
• Compatible with the dc geared motor clamp

Applications:

• Can be used for idle wheel mounting in robot car vehicle