There are a lot of technological processes in the production process of automobile fasteners. Today we will introduce a very important step of automobile fasteners thread. There are two main types of threads:

1、 Thread size out of tolerance: pitch diameter and outer diameter are large / blank diameter is large; pitch diameter is large, outer diameter is small / thread rolling gear top is not high enough, thread rolling wheel is not pressed in enough or tooth root is too shallow; pitch diameter is small, outer diameter / blank diameter is small or tooth top height is not enough; pitch diameter is small, outer diameter is too small / extrusion is too small or tooth root is too deep; pitch diameter is small, outer diameter pair / blank diameter is small or tooth root is too deep; Medium diameter and small diameter are small / billet diameter is small.

2、 Position of tolerance zone: the position of thread tolerance zone is determined by basic deviation, the deviation es on external thread and EI basic deviation of internal thread, G and H are specified for internal thread, and E / F / g and H are specified for external thread. H. The basic deviation of H is zero, that of G is positive, and that of E, F and G is negative. The size of tolerance zone is determined by the tolerance value and divided into several levels according to its grade.

Obel (Kunshan) automobile fastener factory was founded in 1984. It is a professional manufacturer of automobile fasteners of several series and hundreds of products, such as automobile accessories, motorcycle accessories, fasteners, stamping parts, etc. We pay attention to every detail and check the quality level by layer. Our idea is to do a good job in products and services, and develop together with supporting suppliers!