Coil Spring Manufacturers

Royal Spring Industries is one of the leading Coil Spring manufacturers having experience of 25 years in supply for Railway Bogie & Wagon, Automobile suspension, heavy machinery and various industrial applications. As an ISO 9001:2015 certified trusted manufacturer, our specialization lies in the production of high-quality Coil Springs and we supply more that 15+ countries worldwide.

We manufacture a full range of Helical Spring with the following capacity :

Raw-material grades used in manufacturing : BS:970 EN-42, BS:970 EN-45, BS:970 EN-47, 50Cr.V4, 50Cr.4V2, 51Cr.V4, 50Cr.MoV4, 50Si7, 55Si7, 60Si7, SUP-9, SUP-9A, SAE-5160, IS:4454 Part-1 Grade-2, IS:4454 Part-1 Grade-2D, Stainless Steels, others similar foreign grades JIS, ASTM etc.

Painting & Coating used in manufacturing : Synthetic Enamel Paint, Powder Coating, Phosphate, Zinc Coating etc.

Coil Spring specifications required in manufacturing

Coil Spring manufacturing requires precise specifications covering physical dimensions, material grades, mechanical performance rates and finish types. Dimensional data required – Wire diameter, Coil diameter, Number of coils, Free length and end configuration.

Wire diameter (d) : The wire diameter (symbol d) is the physical thickness of the metal wire used to form a Coil Spring. The wire diameter represents the thickness of a Spring. Generally it is found between 1 mm. – 70 mm. in thickness.

Coil diameter : Coil Spring’s diameter is the width of its circular coils. It is measured in three ways – Outer Diameter (OD) from the outer edges, Inner Diameter (ID) across the hollow center and Mean Diameter (MD) is the subtract one wire diameter from the outer diameter or add one wire diameter to the inner diameter. Generally the outer diameter of a Coil Spring is found between 20 mm. – 500 mm.

Number of coils (t) : To calculate, start at one cut end of the wire and trace it around a full 360-degree circle. Each complete circle equals one coil, add any partial turns at the ends to get the total number of coils. Total number of spring coils are counted from tip to top. The coil count refers to the total number of turns or loops in a Spring.

Free length (L0) : Total length of a Spring in its default, unloaded state, it is a very common and important term. Coil Spring’s free length is the total un-loaded length of a Spring in its completely unloaded state before any force or external load is applied. The length of a spring when it is not loaded. Max. capacity is available up to 1000 mm.

Load rate : Coil Spring load rate is the amount of weight or force needed to compress a spring by a single unit of distance. It is calculated using Hooke’s Law (F = k × x), where the load (F) equals the spring rate (k) multiplied by the deflection/travel distance. Rate Rate = Load (lbs.) ÷ Spring Deflection (in.). It refers to the amount of weight it takes to compress a spring a certain distance. Also the Spring rate is the measurement of how much load (in pounds) a coil spring can hold. Example : 400 lbs. constant at 200 lbs. per inch, 6.076 lbf/in etc.

Types of Coil Springs are manufactured by us

3 main types of Coil Spring manufactured by us – Compression Spring, Tension Spring & Torsion Spring and shape wise – Conical end, Open end, Close end, Square end Pigtail end.

Compression Spring : This is a open-coil Helical Springs designed to resist compressive linear forces (push) and open-coil Helical Springs wound or constructed to oppose compression. It serves as energy storage mechanisms when compressed and store energy when force is applied. It is designed to resist compressive forces, open-coiled steel wire in a variety of cross sections and forms. This Spring is an open-coil Helical Spring that resists compressive axial forces, made of round Spring wire and has the shape of a helical coil, elastic machine elements that can be compressed by axial pressure. Max capacity – Wire Dia 70 mm., OD 500 mm., Length 1000 mm. and Load 40 Tons.

Tension Spring : It’s absorbs and stores energy by resisting a pulling force. This is a tightly coiled Springs designed to resist a tensile or stretching, force. This Springs used for applications that receive a tensile load. It have tightly wound coils with no pitch between them. This is a mechanical Spring designed to operate under tensile force, that tightly wrapped coils that function under a force called tension. It is a round shaped coil metal Spring that exhibits flexibility and durability in industrial conditions. Max capacity – Wire Dia 40 mm., OD 300 mm., Length 1500 mm. and Load 20 Tons.

Torsion Spring : This is a mechanical component that stores rotational energy and exerts torque when twisted. This is a Spring that works by twisting its end along its axis. They are Springs that receive a twisting moment around the coil. It stores elastic energy as bending stress in the wire of its coils and exerts a force (torque) in a circular arc. It is designed to operate with torque / twisting / rotary force. This is a type of Spring that works by twisting its ends in opposite directions and essential mechanical components used to store and release rotational energy. Max capacity – Wire Dia 30 mm., OD 400 mm., Length 2000 mm. and Load 15 Tons.

Conical Spring : A Conical Spring is a tapered, cone-shaped compression spring with coils that progressively increase or decrease in diameter. They are a type of compression spring that are in shape of cone. Conical Springs are basically compression springs coiled in increasing or decreasing outer diameters thus making its shape a cone or tapered one. The Conical Spring achieves less body bending and a lower adherence height depending on the shape.

Closed end Coil Spring : A closed end Spring is a Compression Spring where the pitch of the end coils is reduced so the wire tip touches the adjacent coil. Closed and squared ends are the most popular type of ends in Compression Springs. Closed Coil Springs have touching coils and work in tension or torsion. In a closed end Spring, the pitch of the Spring is flat on the end and the tip of the Spring is in approximate contact with the adjacent coil. Closed-end Compression Springs stand upright on flat surfaces due to closed terminal coils.

Square end Coil Spring : A square end Spring commonly called a closed and squared end Compression Spring has end coils that touch the adjacent coil and reduce the pitch to zero. Closed and squared ends are the most popular type of ends in Compression Springs. Square end Springs are best if a ground end is desired. This type of Coil Spring can stand upright without falling over and they are designed for maximum load-bearing capacity.

Open end Coil Spring : An open-end Spring is a Compression Spring where the final coils keep their normal pitch without squaring or closing off. Open Coil Springs are springs whose coils have space or a pitch between each active coil, they are usually designed to fit over a rod or shaft. An open-end Spring leaves the final coil in its natural pitch without bending it back toward the previous coil. Open ends are less common for Compression Spring.

Pigtail end Coil Spring : A pigtail end Spring is a specialized Helical Compression Spring featuring one or both ends tapered down into a reduced-diameter, pig-tail-like coil shape. Pigtail Springs are a type of Coil Spring that features a coiled design with a pigtail end. Pigtail Springs are Cylindrical Coil Springs with curled coil ends that are extensively used in various industrial applications and they are Cylindrical Coil Springs with curled coil ends that are extensively used in various industrial applications.

Custom Coil Spring supplier and their uses

Royal Spring Industries is producing a wide array of Coil Spring and offering an optimum quality range of Coil Springs. Get durable, high-quality Coil Springs and hot coiled Helical Compression Springs in various uses like :

Railway Bogie Coil Spring : This is a heavy-duty Helical Compression Spring made from high-grade alloy steel. It supports the load of the Train and helps maintain consistent wheel-rail contact while compensating for uneven track. This Spring enable better traction by adjusting the wheel set loads, thereby improving the overall stability of the Train. It’s available with single piece or in 3 pcs set (Inner+Intermediate+Outer). Generally it’s found in Wire Dia between 25 mm. – 45 mm., OD between 100 mm. – 400 mm. and Height between 200 mm. – 400 mm.

Automobile Coil Spring : This is spiral-shaped metal parts in a vehicle’s suspension, is helical, metal components that support a vehicle’s weight, absorb road impacts and provide a smoother ride. This is used to used to store energy and subsequently release it, to absorb shock and designed support the vehicle’s weight, can improve a vehicle’s handling, ride comfort, and overall performance. it’s generally found in Wire Dia between 10 mm. – 50 mm., OD between 50 mm. – 350 mm. and Height between 150 mm. – 500 mm.

Crusher Coil Spring : It is a heavy-duty mechanical compression component used in industrial crushers (such as jaw, cone and roll crushers), crafted from premium high-grade alloys and carbon steel, provides critical mechanical support in crusher machines. They store energy and release it to absorb shock or maintain a force, used to absorb shock and vibrations during the crushing process. it’s generally found in Wire Dia between 30 mm. – 60 mm., OD between 250 mm. – 500 mm. and Height between 300 mm. – 600 mm.

Vibrating Screen Coil Spring : It is a a heavy-duty Helical Compression Spring used in industrial screening plants to support the screen deck, isolate massive dynamic vibrations and absorb shock loads during material separation. It acts as buffers during operation, allowing material to move smoothly on the screen. Our Helical springs are essential to the optimal operation of our vibrating machines. Generally it’s found in Wire Dia between 20 mm. – 40 mm., OD between 150 mm. – 450 mm. and Height between 150 mm. – 300 mm.

Pipe Support & Hangers Coil Spring : We are renowned supplier of Helical Spring used in Pipe Supports & Pipe Hangers to accommodate thermal expansion and contraction that occurs in pipes due to temperature fluctuations. They enable pipes to move freely while maintaining stability, preventing stress on joints and potential damage. Generally it’s found in Wire Dia between 30 mm. – 40 mm., OD between 100 mm. – 300 mm. and Height between 300 mm. – 600 mm.

Valve Coil Spring : It is a mechanical Helical Spring that closes an engine’s intake and exhaust valves, keeps the valve closed by applying pressure to the valve stem. We are supplying this Spring for Valve which are used primarily for closing mechanisms, provides the necessary force to keep the Valve seated when no other force is applied, which is crucial for preventing leaks. Generally it’s found in Wire Dia between 15 mm. – 35 mm., OD between 50 mm. – 350 mm. and Height between 150 mm. – 400 mm.

Vibration Isolator Coil Spring : This is the device that reduce incoming vibration into equipment, commonly utilized in vibration control applications to isolate one system from another. The design of Spring allows for a significant amount of compression and elongation, making them suitable for dynamic applications where movement is constant. Generally found in Wire Dia between 30 mm. – 50 mm., OD between 200 mm. – 500 mm. and Height between 300 mm. – 500 mm.

Actuator Coil Spring : It is a mechanical or electromagnetic component that stores and releases energy to create movement or return a device to its default position, it stores energy while the actuator’s in motion. The Helical Spring return actuator uses spring force on one side to either open or close the valve. Generally it is found in Wire Dia between 20 mm. – 35 mm., OD between 100 mm. – 300 mm. and Height between 200 mm. – 450 mm.

Elevator Coil Spring : It is heavy-duty mechanical devices used in lift pits, door mechanisms and suspension linkages to absorb shock, manage load tension and cushion emergency over travel. It is used on the elevator trim system with double groove pulleys. These Elevator Springs are made from very high quality raw material which ensures high durability at its user end. The Spring is designed to absorb shock and provide a smooth ride for passengers and freight, ensuring that Elevator operates effectively under various loads. Generally it founds in Wire Dia between 20 mm. – 35 mm., OD between 100 mm. – 250 mm. and Height between 250 mm. – 400 mm.

Why we are a trusted Coil Spring manufacturing company

Royal Spring Industries is a trusted Coil Spring manufacturer, has focus on producing good quality Springs, use advanced materials to enhance durability & performance, efficiently produce superior products. Our unique features are covered with the following :

Long experience : With over 25 years of experience in the industry, we understand that quality assurance is crucial. Our skilled engineers design and produce Springs that not only meet but exceed industry standards.

Top quality product : We pride ourselves on delivering unmatched quality in every product we create. Our Springs are engineered using superior materials that ensure both durability and performance. Our supreme build quality is complemented by our dedication to customer satisfaction.

Advanced technology : We pride ourselves on our commitment to supreme working performance. We utilize advanced manufacturing techniques and the highest grade materials to ensure that each spring produced provides optimal functionality and durability.

Long lasting product : Our reputation is built on the durability and long-lasting nature of our products. The longevity of Spring is directly tied to the materials used in their production.

Material integrity : We use high-tensile carbon steels, chrome silicon alloys or specialized corrosion-resistant wires only to ensure the quality of our products.

Lowest price : We are recognized for providing the most competitive prices in the market. Our commitment to affordability does not compromise the quality of our products. We leverage advanced manufacturing techniques, ensuring that every Spring is crafted with precision.

Fastest delivery : Our utilization of the latest automated machinery positions us to deliver Coil Spring at unmatched speeds. This modern technology not only enhances our production rates but also ensures precision in every Spring we create.

End-to-End Support : Providing professional consultation from initial concept design through final mass production.

Quality certification : Every phase of manufacturing is overseen by our experienced engineering team, ensuring that each Coil Spring produced is trouble-free and long-lasting. In recognition of our dedication to excellence, we are proud to be certified with ISO 9001:2015 by the QRO certification agency.