Question

Why grub screws are used to hold sleeve on a shaft?

• A. To reduce the misalignment of shaft.
• B. To prevent the relative motion.
• C. To reduce the production cost.
• D. To prevent the leakage of joint.

Hint:

Grub screws are excellent for securing components on rotating shafts without needing complex locking mechanisms.

Answer 1

The Correct Option is B

Grub screws are primarily used to hold one part tightly against another to avoid any sliding or rotational movement.
In the case of a sleeve mounted on a shaft, if the sleeve is not fixed, it may rotate or slide, disrupting the mechanical function.
By driving a grub screw into the sleeve and tightening it against the shaft, any relative motion is restricted.
This secure contact ensures that the sleeve remains fixed in its intended position during operation.
Thus, the main reason for using a grub screw here is to prevent relative motion between parts.