Schnorr Disc Springs
STACKS IN PARALLEL
Disc Spring Engineering
Maximum load - minimum space - maximum flexibility
SHOT PEENING
A set of ‘n’ single springs in parallel (figure 21 – c) results in the following without considering friction.
Spring load
Formula 20
![](https://iecltd.co.uk/wp-content/w3-webp/uploads/2023/02/Disc-springs-Formula-20-1024x171.jpgw3.webp)
Spring Deflection
Formula 21
![](https://iecltd.co.uk/wp-content/w3-webp/uploads/2023/02/Disc-springs-Formula-21-1024x171.jpgw3.webp)
Unloaded Stack Length
Formula 22
![](https://iecltd.co.uk/wp-content/w3-webp/uploads/2023/02/Disc-springs-Formula-22-1024x171.jpgw3.webp)
In this case the spring load must be multiplied by the number of springs in parallel, where as the deflection remains as for a single spring.
For springs in Group 3 with contact flats and reduced disc thickness, t must be replaced with t’ in formula 22.
![](https://iecltd.co.uk/wp-content/w3-webp/uploads/2023/02/Figure-21-2.jpgw3.webp)