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Thread standard
Standard series of diameter and pitch (GB/T193-2003) The diameter and pitch standard combination series shall comply with the provisio of Table 1. In the table, the pitch should be selected in the same row as the diamete Column diameter.Choose the first series of diameters first, the second s...Read More -
Classification and marking of common threads
Marking and marking of thread 8In order to express the many elements of the thread clearly, so as to facilitate processing, the necessary annotation must be made in the pattern of the thread configuration, and the core of the annotation is the complete marking of the thread, for different tired...Read More -
Thread and threaded fittings
Example 1 Is a thread with a tooth type of equilateral triangle, a nominal diameter of 36, and a pitch of 2 considered as a standard thread?Solution: According to the table of the given conditions, the thread whose profile is equilateral triangle and pitch is 2 is an ordinary thread...Read More -
Pre-tightening and anti-loosening of threaded connections
1. Pre-tightening of thread connectionBefore the action of the working load, the screw is subjected to the action of the pre-tightening force. 1. The purpose of pre-tightening 1) Increase the stiffness of the connection 2) Increase tightness 3) Improve the ability to keep loose ...Read More -
Fastener selection guide
Fastener function introduction Fasteners are divided into threaded fasteners and non-threaded fasteners, non-threaded fasteners mainly refer to rivets, welded pins, connecting pins, etc., the engine in addition to the use of non-threaded fasteners, the vast majority are threaded fasteners. The s...Read More -
Threaded connection design
4. Pre-tightening and anti-loosening of thread connection 1. Pre-tightening of thread connectionThread connection: loose connection — do not tighten when assembling, only when the external load is applied to the force — tighten when assembling, that is, when carrying, it...Read More -
Thread type and detection
NPT thread is the American standard 60° taper pipe thread. The formula for calculating the warp of the thread is:The formula for the middle diameter of the thread is: D2=d2=D-0.8XPThe formula for thread path is: D1=d1=D-1.6XPThe fit mode of the thread is divided into cone...Read More -
Basic knowledge of common gaskets
Non-metal tape Itscommonly used non-metallic materials are, such as flexible graphite (<600 ° C), polytetrafluoroethylene (-200~260 ° C), fiber reinforced rubber based composite board. Ribbon of Metal StrapsShape: V, W, wavy, etcMaterial: 0.15~0.25 low carbon steel, stainless steel, c...Read More -
Standard Parts and Common Parts
Standard parts and common parts Standard parts:The structure form, size, surface quality and representation method have been standardized. For example, threaded fasteners, keys, pins, rolling bearings and springs, etc. Standard parts are widely used and are produced by professional factories.Com...Read More
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