
Challenges
Balancing Fit, Movement, and Finish Across Multiple Parts
For consumer products, dimensional accuracy is only one part of the challenge. Multiple components must work together to achieve proper fit, smooth movement, and consistent surface quality. The butterfly trainer combines aluminum alloy, stainless steel, and brass components into one mechanical assembly, while the brass case requires precise alignment between the rotating cover and the main body. In both designs, individual parts could not be evaluated separately. Their performance depended on how well the components interacted after machining and assembly.













