Under what condition might a Class 1 fit be preferred?

A Class 1 fit is typically used in applications where ease of assembly and disassembly is essential. This type of fit allows for some clearance between the parts, helping to prevent jamming and making it easier to remove components without damaging them. This is particularly important in situations where maintenance or replacement of parts is frequent, as it enables technicians to work efficiently.

In contrast, high-speed applications often require tighter fits for stability and performance, while applications needing tight tolerances demand precise fits to ensure functionality and prevent excess movement. Switching between different sizes may suggest flexibility, which is better suited to types of fits that allow for adjustments rather than a Class 1 fit.