What is screw tightening torque?
Consequently the value of the clamping force is usually referred to as the tightening torque. The remaining tightening force is consumed in friction in the screw joint – 40% of the torque to overcome the friction in the thread and 50% in friction under the screw head.
What are the components of load torque?
Components of load torques:
- Friction Torque (TF) The friction torque (TF) is the equivalent value of various friction torques referred to the motor shaft.
- Windage Torque (Tw) When a motor runs, the wind generates a torque opposing the motion .
- Torque required to do useful mechanical work ( Tm)
Which is the correct torque for a fastener?
* Tightening Torque (in-lbs through M8; M10 & over ft-lbs) METRIC FASTENERS Nominal Size or Basic Screw Dia. Threads per inch Tensile Stress Area (sq. in.) ASTM A574 Clamp Load (lbs) Tightening Torque K = 0.15 K = 0.17 K = 0.20 Coarse Thread Series
Is there a way to measure the tightening torque?
The problem is that there is no practical way to measure the clamping force in normal production situations. Consequently the value of the clamping force is usually referred to as the tightening torque.
What causes a bolt to stretch when torque is applied?
The rotation Of a bolt (torque) at some point causes it to stretch (tension). Several factors affect how much tension occurs when a given amount Of tightening torque is applied. The first factor is the bolt’s diameter. It takes more force to tighten a 3/4-10 bolt than to tighten a 3/8-16 bolt it is larger in diameter.
What happens if you don’t follow torque specifications?
In training across the United States, and even abroad, I have found that this failure to follow manufacturer’s torque specifications has proven to be the source of equipment failures, industrial arc flash accidents, and house fires.