Leg Joint

Vex Universal Joint

and Single Universal Joint

 

•  Price:  Vex - 5 for 9.99 , Single - 14.99
•  Pros: Designed specifically for motion of robots
• Cons: May not be compatible with other parts (need to fit link in the hole, Vex joint needs Vex links: http://www.robotshop.com/en/vex-12in-square-bars-2pk.html).

  Two Axis Camera Mount Hinge

• Price: $2.15
• Pros: Cheap hinges system. Can be attached to rods easily.
• Cons: Meant for mounting and not rotating. However, if the screws are not tightened then it could freely rotate

Point Hinge
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• Price: $4.36 for 15
• Pros: Low cost, (lightweight) designed for airplanes
• Cons: maybe too small?

Carbon Fiber Tube Clevis Connector

• Price : 
• Female Connector for 1"/0.75" - $20.25/$15 each
• Male Connector for 1"/0.75" - $20/ $15 each
• Pros: 
• Specifically meant for Carbon Fiber Tubes (which we will likely use for the links)
• Compact design
• Cons:
• Intended for Carbon Fiber structures so may not promote mobility (potential friction locking hinders movement)
• Expensive

Box Hinge

• Price: $3.50 for 20 ($.125 ea.)
• Pros: Low cost, low footprint (8x10mm), low weight (
• Cons: May be challenging to attach sturdily to the legs/attach tendons

Butterfly Hinge

• Price: $.52 ea.
• Pros: Low cost, can be easily adapted into a straight line leg 
• Cons: May require some machining to attach properly