Torque vs Clamping Force

Nuts and bolts are basic types of fasteners used to hold things together. The threads of a bolt work like a screw, which is an inclined plane wrapped around a bar. Three types of forces are involved in fastening something together with bolts and nuts. First is the preload force, which is the amount of force that is exerted to turn the nut or bolt. This value is determined from the torque . The second force is the tension force, which is the force the materials held together exert on the nut and bolt. The difference between these forces results in the clamping force, which is the force holding everything together.

Torque, moment or moment of force (see the terminology below), is the tendency of a force to rotate an object about an axis, [1] fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist to an object. Mathematically, torque is defined as the cross product of the lever-arm distance and force, which tends to produce rotation.

Loosely speaking, torque is a measure of the turning force on an object such as a bolt or a flywheel. For example, pushing or pulling the handle of a wrench connected to a nut or bolt produces a torque (turning force) that loosens or tightens the nut or bolt.

The symbol for torque is typically τ, the Greek letter tau. When it is called moment, it is commonly denoted M.

The magnitude of torque depends on three quantities: the force applied, the length of the lever connecting the axis to the point of force application, and the angle between the force arm[2] vector and the lever arm.

Key notes:

You can also measure preload & tension force (usually in inch/pounds or foot/pounds) using a torque wrench.

For the tine-lock nuts, the force required to install the nut is not of any consequence, but the force required to remove it should be the critical value.