Ball-bearing screws are commonly found in this application_____________________?
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Answer: D. steering mechanism
Explanation
Ball-bearing screws are commonly found in vehicle steering mechanisms for smooth operation. Recirculating balls eliminate sliding friction between the screw threads and the mating nut. This high-efficiency mechanical linkage reduces steering effort for the vehicle driver. Ball-bearing screws use a rolling element design to convert rotational motion into linear motion. Rolling friction is significantly lower than sliding friction found in traditional power screws. Tight tolerances and hardened steel surfaces ensure long operating lifespans in automotive steering.
Modern steering gearboxes utilize recirculating ball screws to provide precise vehicle control. CNC machine tools also employ ball screws to drive axes with extreme positional accuracy. Reducing mechanical backlash in steering mechanisms is vital for safe and responsive handling. Option A suggests a screw jack, which typically uses high-friction acme threads to prevent back-driving. Option B mentions aeroplane engines, which rely on gears and shafts rather than steering screws. Option C lists a crane, which uses cable drums and winches for lifting heavy suspended loads.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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