Quadruped robots require a large number of small structural parts that are both lightweight and highly rigid. Recently, we received a customer request to prototype a joint connector for their robot dog’s leg. This part is made of aerospace-grade aluminum alloy, features an internal splined bore, and required fast turnaround. We successfully completed the prototype by machining a solid 7075-T6 aluminum billet on a 5-axis machining center.

The core advantage of 5-axis machining is that it enables one-setup processing of the flange, angled fork, and bore, eliminating the need for multiple re-clampings and significantly improving machining efficiency and accuracy. This connector links the leg actuator to the rotating joint, integrating three key features on a single billet: a hub with an internal splined bore, a mounting flange with bolt holes, and a fork (clevis) end with a through-hole for the pivot. The splined bore transmits torque from the actuator shaft. Since the part bears load every time the robot moves, the splined bore, bolt hole pattern, and pivot hole must be precisely aligned with one another.

Part type: Custom Quadruped Robot Leg Joint

Material: AL 7075-T6

Machining Process: 5-axis CNC Milling

Surface Finish: As-machined

Before shipment, we conducted comprehensive inspections on key dimensions affecting assembly of this custom robot dog joint connector, including the positional accuracy of bolt holes and pivot hole, spline parameters, and overall dimensions, to ensure full compliance with the drawing. This allows the customer to directly bolt the part into their assembly.

Such robotics components, including this custom robot dog joint connector, often undergo several design revisions before finalization. Our core service strengths lie in fast prototype turnaround and support for low-minimum-quantity pilot builds.

We provide custom CNC machining services for low-volume production and Rapid Prototyping for design verification.  Click Here to Upload Your CAD Files