Custom Manufacturer Large Helical Spiral Heat Resistant Stainless Steel SS Heavy Duty Coil Compression Spring Zihuoli manufacturer, supplier and exporter a qualitative range of Coil Springs. Coil springs are precisely engineered using latest machinery at our well-equipped infrastructure. Zihuoli offer these Coil Springs various types of material sections like flat, square, round and rectangular. Wire Diameter 0.1 to 18mm Material Stainless steel, Carbon steel,music wire/piano wire,Beryllium copper, Brass, Alloy steel,etc Surface Treatment Zinc-plated, nickel-plated, chrome-plated, gold-plated, Imitation gold-plated, Tin, Powder coating, Oxide black or customized, etc Main Products Compression Spring, Extension Spring, Torsion Spring, Wire Forming Spring, Stamping Parts and so on Packing Inner packing with plastic bags, and then carton boxes for the outer packing, and then the wooden or plastic pallets for request Produce Equipment Advanced CNC Spring machinery; Advanced grinding and short blasting machinery; Precise tensile strength testers, compression testers, endurance testers, magnetic powder flaw detectors Test Equipment Projectors; Digital hardness tester; Digital torsion strength tester; Digital compression and torsion strength tester; Elasticity tester; Life tester; Salt spray test machine etc. What is Compression spring? Compression Springs are open-coil helical springs wound or created to oppose compression along the axis of wind. Helical Compression is the most typical steel springtime arrangement. These coil springs can function individually, though commonly assembled over a guide rod or equipped inside an opening. Typical Compression Spring Design Terms According to the Spring Manufacturers Institute Handbook of Spring Design, commonly used compression spring terminology includes the following: Wire diameter (d) Outside Diameter (O.D) Inside Diameter (ID) D coil diameter =Outside Diameter. (O.D. + I.D.)/2 or O.D. - d Free Length = The total length of a compression spring when it is unloaded. Pitch (P )= the distance between the wire centers in adjacent active coils. It is best practice to specify the number of active coils rather than the pitch. Compression Spring Materials Zihuoli Spring custom compression springs from a variety of materials. Music wire, hard drawn, stainless steel (type 302, type 316), oil tempered, chrome silicon, and phosphor bronze are the most common material types for compression springs. We also make compression springs out of more exotic materials like Inconel, Monel, Beryllium Copper, and others. In order to provide our customers with the shortest lead times possible, we stock several of these material types in various diameters. Compression spring materials that are commonly used include: • Carbon Steel • Stainless steels • Alloy steel • Copper Base Alloy • Nickel Base Alloy • Cobalt-Nickel • Titanium Zihuoli Springs Capability for Different Compression Spring Body Shapes There are four different body designs for compression springs are produced by Zihuoli Spring. straight cylindrical compression spring Conical or tapered compression springs, barrel compression springs, hourglass compression springs, FAQ 1.Why you choose us? We have 14 years experiences in producing springs. We have our own factory, warehouse, machines, test equipment, engineers, rigorous QC and good service. 2.Do you offer custom service? Yes, it's our job, send us your specification or drawings, and we will make you perfect products. Or tell us your idea for getting a design from us. 3