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 Production Capacity:
Parameters of conical compression springs
 Physical parameters
- d (wire diameter): This parameter describes the diameter of wire used as material for spring.
- S (shaft): This parameter describes the maximum diameter of spring shaft in industrial applications. Tolerance for this parameter is (+-)2%(indicative).
- De (Larger External Diameter): External diameter at large end of the spring. Tolerance for this parameter is (+-)2%(indicative).
- Ds (Smaller Internal Diameter): Internal diameter at small end of the spring. Tolerance for this parameter is (+-)2%(indicative)
- H (hole): This is the minimum diameter of the hole in which spring can work. Tolerance for this parameter is (+-)2%(indicative).
- Ln (Block): Maximal length of a spring after total blocking. For most conical springs this value equals double wire diameter. Tolerance for this parameter is (+-)2%(indicative).
- L0 (free length): Free length of compression springs is measured in its uncompressed state after previous one time blocking. Tolerance for this parameter is (+-)2%(indicative).
- R (spring rate): This parameter determines spring's resistance, while it is working. It is measured in 1 DaN/mm = 10 N/mm. Tolerance for this parameter is (+-)15%(indicative).
- L1 & F1 (length at force F): Force F1 at length L1 can be calculated from equation : F1 = (L0-L1) * R. Equation derrived from previous for calculating L1 : L1 = L0 - F1/R.
Compression spring parameters
Physical parameters
- d (wire diameter): This parameter describes the diameter of wire used as material for spring.
- S (shaft): This parameter describes the maximum diameter of spring shaft in industrial applications. Tolerance for this parameter is (+-)2%(indicative).
- Di (internal diameter): Internal diameter of a spring can be calculated by subtracting the doubled wire diameter from the external diameter of a spring. Tolerance for this parameter is (+-)2%(indicative).
- De (external diameter): External diameter of a spring can be calculated by adding the doubled wire diameter to the internal diameter of a spring. Tolerance for this parameter is (+-)2%(indicative).
- H (hole): This is the minimum diameter of the hole in which spring can work. Tolerance for this parameter is (+-)2%(indicative).
- P (pitch): Average distance between two subsequent active coils of a spring. Tolerance for this parameter is (+-)2%(indicative).
- Lc (block length): Maximal length of a spring after total blocking. This parameter is shown in the picture on right. Tolerance for this parameter is (+-)15%(indicative).
- Ln (allowable length): The maximum permitted length of a spring after loading. If deflection is higher it may cause plastic deformation (the non-reversible change of shape in response to an applied force). For many springs danger of deformation do not exists. In this case Ln = Lc + Sa, where Sa is the sum of minimum permissible spaces between active coils.
- L0 (free length): Free length of compression springs is measured in its uncompressed state after previous one time blocking. Tolerance for this parameter is (+-)2%(indicative).
- Nr of coils: This is a total number of coils in a spring - in the picture above it is equal to six. To calculate number of active coils substract two terminating coils from total number of coils.
- R (spring rate): This parameter determines spring's resistance, while it is working. It is measured in 1 DaN/mm = 10 N/mm. Tolerance for this parameter is (+-)15%(indicative).
- L1 & F1 (length at force F): Force F1 at length L1 can be calculated from equation : F1 = (L0-L1) * R. Equation derrived from previous for calculating L1 : L1 = L0 - F1/R.
- Grinding: Defines whether or not the ends of a spring are ground.
Characteristics
- Ends: All compression springs have flat ends.
- Spring rate: Tolerance for spring rate is (+-)15%(indicative).
Wire Types: :
- music wire: a high carbon steel for high stress applications
- harddrawn MB: a carbon steel for low stresses and low cost
- oil tempered wire: a carbon steel for wire forms and torsion springs
- stainless steel: types 302 and 316 for high stresses in larger wire sizes
- chrome vanadium: an alloy wire for high stresses in larger wire sizes
- phosphor bronze: for electrical applications
- brass: for applications requiring water resistance
- others: available on as needed basis
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