Jacking- All collet-equipped jacks must have what feature to prevent removal?

Jacking- All collet-equipped jacks must have what feature to prevent removal?

• A. A safety pin
• B. The ram locking nut, peened or staked to prevent removal from the ram.
• C. A spring-loaded catch
• D. Lubrication port

Answer: (B)

In collet-equipped jacks, a key safety feature is a ram locking nut that is peened or staked to prevent removal from the ram. This one-way lock ensures the nut cannot back off or come off due to vibration or hydraulic forces while the jack is in use. Peening or staking deforms the nut or the adjacent surfaces so the nut remains securely in place, keeping the ram attached and the clamping or extension setting stable. Other options, like a separate safety pin, a spring-loaded catch, or a lubrication port, do not reliably prevent the ram from being unintentionally removed in operation, so they don’t fulfill this specific retention requirement.

In collet-equipped jacks, a key safety feature is a ram locking nut that is peened or staked to prevent removal from the ram. This one-way lock ensures the nut cannot back off or come off due to vibration or hydraulic forces while the jack is in use. Peening or staking deforms the nut or the adjacent surfaces so the nut remains securely in place, keeping the ram attached and the clamping or extension setting stable. Other options, like a separate safety pin, a spring-loaded catch, or a lubrication port, do not reliably prevent the ram from being unintentionally removed in operation, so they don’t fulfill this specific retention requirement.