Chapter 3: Robot Installation Figure 3-6. Inner Arm Ball Studs WARNING: Pinch hazard. Ball joints are spring-loaded. Be careful not to pinch your fingers. l Outer arm pairs are shipped assembled. Each pair has two springs and two horseshoes at each end. See the following figure. Inner Arm Ball Joint Stud Ball Joint Socket Insert Pressed Pin Ball Joint Socket Outer Arm Springs Spring Horseshoe Outer Arms Figure 3-7. Ball Joint Assembly CAUTION: Ensure that the bearing insert is in place in the end of each outer arm. Hornet 565 Robot User's Guide, 14608-000 Rev C Page 29 of 156