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Machine Designer's Note

Spring

Articles about springs and springs.

: Basic design and selection guideline for compression springs (with calculation sheet)

2022/6/3 Spring

Today's note is on "Basic Design and Selection Guidelines for Compression Springs" for those who are new to compression spring design. *In this article: Compression spring calculation Excel and explanation of each item ...

: Allowable bending stress graph for springs

2022/4/11 Spring

Today's note is about "Allowable Bending Stress Graphs for Springs (Spring)".　 In the calculation of compression springs, it is necessary to know the stress rate in order to find the maximum stress at which the spring can be used without breaking.　The ...

: Piano wire (SWP-A, SWP-B, SWP-V) Tensile strength against wire diameter unit

2022/4/11 Spring

Today's note is on "Tensile Strength of Piano Wire (SWP-A, SWP-B, SWP-V) per unit of wire diameter. Piano wire" used for compression springs, etc. is represented by the symbol "SWP" ...

: Lateral modulus of elasticity of SWPA and SWPB in spring spring constant calculations

2025/9/25 Spring

Today's note is about "Lateral Modulus of Elasticity of SWPA and SWPB in spring spring constant calculation". In the calculation of compression springs, the key "modulus of transverse elasticity" is used to calculate the spring constants ...

: What is the spring constant? Why spring constants vary and tips to suppress variation.

2025/10/19 Spring, Design Information

Today's note is on "What is spring constant? Reasons why spring constants vary and tips to suppress the variation". The "spring constant" that comes up when designing compression springs, the basic concept of spring constants, and ...

: Confirmatory calculation of tensile spring

2024/6/17 Spring

Today's note is about "Confirmation Calculation of Tensile Springs". I recently had to use tensile springs with multiple loads, and I have uploaded the contents of the confirmation excel sheet and the calculation excel sheet that I created for this purpose. ...