As a famous China Machine Screws Manufacturers and Home Hand Tools Suppliers,Lizhan Hardware Co., Ltd. is located in the beautiful paradise - Hangzhou, the geographical position is superior, close to Shanghai and Ningbo port, to bring great convenience to customers. Machine Screws Stove Bolts in a Variety of Drive, Head and Thread Styles. A machine screw is a screw or bolt with a flat point. Available in a variety of drive styles, machine screw sizes, heads and materials to fit a wide range of application needs. These machine screws are used with nuts or These machine screws are used with nuts or directly into a female-threaded receptacle to securely fasten metal parts together. Fully threaded they are made of zinc-plated steel for durability and installed into an existing or pre-drilled pre-tapped hole.
A screw is a type of fastener, in some ways similar to a bolt (see Differentiation between bolt and screw below), typically made of metal, and characterized by a helical ridge, known as a male thread (external thread). Screws are used to fasten materials by digging in and wedging into a material when turned, Types of threads. In threaded fasteners, large amounts of friction are acceptable and usually wanted, to prevent the fastener from unscrewing. So threads used in fasteners usually have a large 60 thread angle: (a) V thread - These are used where additional friction is needed to make sure the screw remains motionless, such as in setscrews and adjustment screws , This is a machine screw with a length of 3/4 inches. We generally use this to secure roller chain, but can be used for many applications, such as mounting electronics.
Machine Screws . 78. L. L. Axis of screw thread . Basic major diameter Minor diameter Basic pitch diameter. Thread Dimensions. a. Tensile strength values are based on 60,000 psi. and apply to carbon steel screws and SEMS only. Shoulder screws , also known as shoulder bolts and stripper bolts, are machine screws with an integral shoulder or journal between the head and thread. Metric bolt torque specificatioon chart for machine repair service. Approximate bolt tightening specs to be used as reference material if manufacturers bolt torque heremendations are not attainable.
Of all the screws used for industrial motion control, ball screws rise to the head of the class, offering several advantages over other options such as roller screws and acme screws .