Diff. 531's & 537's JR-servo
The 537 is the new replacement for the 517 and has the same specs:
Speed: .25 sec. 60 deg.
Torque: 40.3oz/in
Size: .73"X1.52"X1.32"
weight: 1.58 oz.
single ball bearing.
531 servo:
Speed: .21 sec. 60 deg.
Torque: 51oz/in
Size: .73"X1.52"X1.32"
weight: 1.5 oz.
single ball bearing.