| Part No. | Do (mm)i | Di (mm)i | L0 (mm)i | t (mm)i | F1 (N)i | Material | Standard | Stock | Price Ex. VAT | |
|---|---|---|---|---|---|---|---|---|---|---|
| Loading disc springs… | ||||||||||
How to Choose a Disc Spring
Define the maximum outer diameter Do, the inner diameter Di needed for the guide pin or shaft, and the available axial height.
Determine the force needed at the operating point and the travel from the unloaded length to the working length. Choose a spring whose F1 and L1 are as close as possible to that point.
Is the load static, occasional or dynamic? In dynamic use the spring should not regularly be compressed completely flat, and the working range must be checked for your design.
If one spring does not give enough force or travel, combine several: in parallel for more force, in series for more travel.
1.1231 / 1.1248 / 1.8159 – Spring Steel
High strength for many standard industrial applications. Needs corrosion protection; may be supplied phosphated and oiled, which gives limited protection in dry environments.
1.4310 – Stainless Steel
Suitable for humid environments. Limited suitability for permanent contact with seawater or chlorides.
1.4568 (17-7 PH) – Stainless Steel, precipitation-hardening
High strength and suitable for dynamically loaded applications.
Metric disc springs in the range are manufactured to or similar to EN 16983 (formerly DIN 2093), divided into series A, B and C and groups 1 to 3.
Belleville springs have imperial dimensions and add intermediate sizes. Never swap a Belleville spring for a metric one based on diameter alone.
The force F1 applies only at the loaded length L1, so always compare the two values together.
In parallel the forces add up while the travel stays the same; in series the travel adds up while the force stays the same. Use as few springs as reasonably possible.
Use flat, hard supporting surfaces, guide the springs with sufficient clearance and lubricate stacked springs.