The construction screw rod is mainly divided into two kinds: jacking bracket and base pole. It is also called adjustable screw rod. It is mainly used with scaffolding. It plays the role of top and bottom brackets in the process of use. The top bracket consists of struts, pallets and adjustable. Nuts and other components.
We generally choose the adjustable screw rod, we must first choose according to the actual needs of the construction, we must first ensure that its production requirements meet the standards, the accuracy of the secondary product and high carrying capacity is also we need to consider, and then used on a screw The quality of bolts must also meet the standards, so as to avoid problems such as offset or locking.
The classification of the adjustable screw: The adjustable screw has only five elements with the same internal and external thread screw can rotate with each other. Among them, the thread profile, major diameter, pitch, number of threads, and rotation direction are called five elements of the thread. Screw profile, the outline shape of the thread is called dental profile. The angle between two adjacent flank faces is called the angle of the tooth. The common thread has a triangular shape, which passes through the section of the thread axis.