How does screw bolts work?

Screw bolts provide more strength and power than nails. Also, if something needs to be disassembled, screw bolts can easily be removed. Screw bolts are available with different coatings to deter rust. They are manufactured with four basic heads and different kinds of slots.

• How do screw bolts work?

• What is the terminology of screw bolts?

• What should be paid attention to when using screw bolts?

How do screw bolts work?

A screw bolt has the same overall shape as a nail. But it includes a spiraling groove travelling around and down the shaft. The head of screw bolts has several options, including hex, pan, flat and round. Drives can be slotted or made with a Phillips head design.

When you need to hold two materials or objects together, the groove helps keep the screw bolts in place and the bond secure. To drive the screw bolt into a material, youl need a screwdriver that is compatible with the head design.

There are many different types of screw bolts. While their exact uses differ, what a screw bolt does best is hold two things together.

A screw bolt is the simplest machine. It has an inclined plane wrapped around a cylinder. The head acts as a lever. As it rotates, the spiraled incline advances into a surface.

What is the terminology of screw bolts?

The angle of thread of screw bolt includes between the sides measured in an axial plane.

Helix angle is made by the helix or conical spiral of the screw bolts at a pitch diameter with a plane perpendicular to the axis.

Crest is the surface of the thread corresponding to the major diameter of the screw bolt and the minor diameter of the nut.

Lead is the distance that a thread advances axially in one turn. On a single-threaded screw bolt, the lead and pitch are identical. On a double-threaded screw bolt, the lead is two times the pitch. On a triple-headed one, the lead is three times the pitch.

Root is the surface of the thread, corresponding to the minor diameter of the screw bolt and the major diameter of the nut.

Side or flank is the surface of the thread which connects the crest with the root.

Axis of a screw bolt is the longitudinal central line through the screw bolt.

Depth of thread is the distance between the crest and the base of the thread.

Number of threads is the number of threads in one inch of length.

Length of engagement is a length of contact between two mated threaded parts measured axially.

Depth of engagement is a depth of thread contact of two mated parts measured radially.

What should be paid attention to when using screw bolts?

Keep the center axis of the screw bolt and nut perpendicular to the connecting surface to reduce the deflection angle.

Use a torque wrench or socket wrench as much as possible to avoid excessive force and control the torque within the safe torque range.

Try to use a manual wrench to slow down the locking speed of screw bolt. Keep the threads clean. Use lubricating oil to reduce the coefficient of friction to decrease heat energy and adhesion.

Choose screw bolts with relatively high hardness to reduce thread shear.

Use anti-locking agent for screw bolt to reduce the locking effect.

Jiangsu Suqing Standard Parts Co., Ltd. has advanced testing equipment and strict quality testing of the screw bolts produced. Our company pursues high-quality products and services.