HomeEngineeringThe efficiency of a square threaded screw is maximum if the helix angle is equal to (where φ = Angle of friction) 12965. The efficiency of a square threaded screw is maximum if the helix angle is equal to (where φ = Angle of friction)By Admin / September 13, 2025 90° – φ 45° – φ 45° – φ/2 45° + φ/2 ✅ The correct answer is option C.
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