Question

Which of the following screw thread is used for transmitting force in one direction?

(a) square thread

(b) trapezoidal threads

(c) buttress threads

(d) v threads

The question was asked in semester exam.

I need to ask this question from Friction of a V-thread topic in division Friction of Machine Kinematics

Answer 1

Right answer is (c) buttress threads

The explanation is: A buttress thread, is used when large forces act along the screw axis in one direction only. This thread combines the higher efficiency of square thread and the ease of cutting and the adaptability to a split nut of acme thread.