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Heavy Duty Die Springs from China - Quality Coil Springs Suppliers & Factory for High Stress Applications
Feature
Features and Benefits of Die Springs
Shot-peened for extended life.
Preset to prevent length loss in operations.
Powder Coated for corrosion resistance and color coded for ease of identification.
Closed and Ground Ends to provide appropriate squareness and adequate large bearing surface and will stand on either end.
Applications
Die Springs are not solely used in dies but applications such as oil and gas drills, clutches, brakes, farm machinery and aircraft mechanisms. They are ideal for use as heavy duty compression springs for any high stress, heavy load application.
Tips for Selecting
1
Determine if springs will be used for short run, average cycle long run, rapid cycle or extra stress.
2
Use as many springs in the die as space permits with the least amount of deflection.
3
The more rapidly a spring is cycled, the greater the need to operate within the ideal operating range.
4
Make sure hole and rod sizes are properly matched with the spring. Faulty spring guidance will cause buckling and possible spring failure.
5
Preventive maintenance on dies should be performed on a regular basis and die springs should be replaced at appropriate intervals to prevent downtime.
6
Replace all springs in a die at the same time. This will insure an even distribution of the load.
7
Do not rework die springs by grinding the inside or outside diameter or by cutting off coils. This could result in premature spring failure and possible die damage.
Configurations
SMS Spring offers FIVE color-coded families of Die Springs, based on Load.
Medium Load
Color Code: Gray
Medium Plus Load
Color Code: Beige
Medium Heavy Load
Color Code: Purple
Heavy Load
Color Code: Black
Extra Heavy Load
Color Code: Orange
Frequently Asked Questions
Q
What are die springs used for beyond stamping dies?
Die springs are versatile heavy-duty compression springs used in a wide range of applications beyond stamping dies, including oil and gas drills, clutches, brakes, farm machinery, and aircraft mechanisms. They are ideal wherever high stress and heavy load performance is required.
Q
How do I choose the correct die spring load category for my application?
SMS Spring offers five color-coded load families: Gray (Medium Load), Beige (Medium Plus Load), Purple (Medium Heavy Load), Black (Heavy Load), and Orange (Extra Heavy Load). First determine your cycle type — short run, average, rapid, or extra stress — then match the appropriate load category to your application requirements.
Q
Why is shot-peening important for die springs?
Shot-peening is a surface treatment process that introduces compressive stress into the spring wire, significantly extending the fatigue life of the spring. This makes die springs more resistant to cracking and failure under repeated high-stress cycling.
Q
Can I modify die springs by grinding or cutting coils to fit my die?
No. You should never rework die springs by grinding the inside or outside diameter or by cutting off coils. Such modifications can result in premature spring failure and potential die damage. Always select the correct spring size for your application from the start.
Q
How often should die springs be replaced?
Preventive maintenance should be performed on a regular basis, and die springs should be replaced at appropriate intervals to prevent unexpected downtime. It is also recommended to replace all springs in a die at the same time to ensure an even distribution of the load across the entire die set.
Q
What does "closed and ground ends" mean for die springs?
Closed and ground ends mean the final coils of the spring are tightly wound together (closed) and then machined flat (ground). This provides proper squareness, a stable and large bearing surface, and allows the spring to stand upright on either end — ensuring consistent load distribution and accurate alignment within the die.