m-d-s.co.za

Precision Engineered, Innovation Delivered

Correct use of Die Springs assures performance and extended lifetime

Before using Die Springs, carefully read all the recommendations below. Incorrect use can significantly reduce the expected lifetime and may cause damages or injury.

Do not exceed the maximum deflection of the spring. This may cause sudden failure of the spring and damages to the tool. Do not store springs in a compressed state for a long length of time. This may cause abnormal fatigue to the springs.

Apply a minimum pre-load of at least 5% of the free length of the spring. The bigger the pre-load the longer the lifetime of the springs for the same total deflection. i.e. Longer Springs with a bigger pre-load will last longer.

The bigger the guide the longer the lifetime. It is essential to guide all springs with a free length/diameter ratio exceeding 3.5.

Replace all springs at the same time. If one spring collapses, an imbalanced load will occur possibly damaging the other springs. Advance planned maintenance according to the expected lifetime of the spring will assist with avoiding damages and saving costs.

Altering the surface of the spring (cutting, grinding, scratching etc.) can significantly reduce the lifespan of the spring. Rather replace damaged springs with new ones.

Check springs regularly for any foreign bodies which may have become trapped between the coils. This leads to a reduction of spring deflection, overloads, imbalances, and early failure of springs which could damage the tool.

Avoid using springs in a vertical stack if they are not fully guided.

Do not insert springs into the middle of other springs – this can cause serious damage or injury.

Tool maintenance can change the original working deflection of the springs. Please always check the real working stroke of the springs to avoid early failure and damages to the tool.

Best working temperature is -30°C to +120°C. Between 120°C and 250°C, springs lose 1% of their spring rate for every 40°C rise in temperature.

When using different types of springs in parallel simultaneously, ensure that the overall deflection and force is balanced. When setting the springs, ensure they are perpendicular to the working surface to avoid early failure of the springs.