Compression Spring

Common Forms :

Conical, Concave (Barrel), Convex (Hourglass) and various combinations of above. The space allotted will decide the allowable Solid Height, Inner Diameter and Outer Diameter of Compression Springs. Along with the Load and Deflection, the Dimensional Limits will decide the Stress Level. Therefore, to avoid any Design Changes, sufficient care should be taken to decide allotted space.

Spring Materials :

Common Spring materials include Stainless Steel, Alloy Steels, Carbon Steels and some Non-Ferrous materials. NISHI also produces spring from Exotic material like Inconel X-750, Inconel 718, Nimonic 90, Monel, Nimonic, Hastelloy, Beryllium copper etc. Our Speciality is in Inconel Materials

Spring Design :

Selection of material is one of the important steps in Spring Design. Types of material available, Mechanical and Electrical Properties, Operating Conditions are few points of prime importance for material selection. In case of Heavy Stress Cycles, a Tight Control is required in material quality. Scratches, seams and other such flaws affect fatigue life considerably. Carbon Steel and Alloy Steel give optimum Service and Heavy Stress Cycles.

Stress Relieving :

Coiling operation produces Stress so Springs must be Stress Relieved. To relieve the harmful residual stresses, Stress Relieving of Springs is done. Depending upon the type of Spring Material - Furnace Temperature & Soaking Time will vary accordingly. Stress Relieving causes dimensional distortion so manufacturer should predict the change to achieve required dimensions. Forming should immediately follow stress relieving. We have in-house heat-treatment furnaces for large diameter springs. We also do shot peening on springs to introduce compressive stresses on the springs which help to increase the fatigue life of the springs.

Capacity :

We manufacture Compression Springs of any Size, Length and Dimension as per Customer Specifications / Dimensions / Drawings / Samples.

Surface Coating :

We offer a variety of Coating on Springs like Mechanical Zinc plating, Zinc Electro plating, Nickel Plating, Electroless Nickel plating, Geomet, Dacromet Coating, Cadmium Plating, Powder Coating, Epoxy painting etc.

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