Compressed spring design parameters

Necessary information for compression springs:

1. Controlling diameter of the compression spring:
   1. outer diameter
   2. inner diameter, installation guarantee size
   3. inner diameter of the sleeve
   4. outer diameter of the round rod passing through
2. Size of wire or bar.
3. Material (type and grade).
4. Number of coils:
   1. total number of coils
   2. right-hand or left-hand twist
5. Style of ends.
6. Load under a certain deflection area length.
7. Load ratio within the length change range from one inch to several inches.
8. Maximum solid height.
9. Minimum compression height during use.