Question about servo?

Help & Support Robot Parts
1

I was thinking of using a HS-422 servo instead of the HS-645 MG as recommend by this kit robotshop.com/en/lynxmotion-t-hex-3dof-hexapod-robot-kit-botboarduino.html (im going to get the hardware only. Im looking at this to see what servo they use ) to cut back cost.

My question is that will i run into any serious trouble on the lower torque servo like the servo failed to move or broke down due to load/stress ?

Here the link to the 2 servo :

HS-422 : robotshop.com/en/hitec-hs422-servo-motor.html

HS-645 MG : robotshop.com/en/hitec-hs645mg-servo-motor.html

Thank you

2

The 422 servo can provide up to 4.1Kg-cm of torque, and uses plastic gearing internally.
The 645MG servo can provide up to 9.6Kg-cm (more than double) and uses metal gears.
The 422 will simply not be enough to support a T-Hex walking robot.