Spring Designer

Rate, stress and free length for compression and extension springs.

Spring Designer

Helical spring design with stress analysis and fatigue life prediction

Spring Configuration

Spring Type

Material

End Type

Geometry

Wire Diameter

Mean Coil Diameter

Free Length

Active Coils

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Target Deflection

Target Cycle Life

Material Properties

G = 79,300 MPa

Sut = 1800 MPa

Sys = 1080 MPa

ρ = 7850 kg/m³

Spring Characteristics

Spring Rate

5.87 N/mm

Spring Index (C)

7.50

Force @ Deflection

88.1 N

Solid Length

18.0 mm

Shear Stress

504 MPa

SF (Yield)

2.14

SF (Fatigue)

1.92

Natural Freq

196.0 Hz

Load-Deflection Curve

Goodman Fatigue Diagram

Operating at τ_m = 252 MPa, τ_a = 252 MPa ✓ Within safe zone

Design Summary

Geometry

Wire Ø: 2 mm

OD: 17.0 mm

ID: 13.0 mm

Total Coils: 10.0

Wire Length: 0.47 m

Performance

Max Deflection: 32.0 mm

Force @ Solid: 188.0 N

Energy Stored: 660.8 mJ

Mass: 11.6 g

Design Checks

✓ Spring index OK (4-12)

✓ Buckling OK (L/D ≤ 4)

✓ Coil clearance OK (2.13 mm)

⚠ Stress at solid exceeds yield

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Spring Designer

Helical spring design with stress analysis and fatigue life prediction

Spring Configuration

Spring Type

Material

End Type

Geometry

Wire Diameter

Mean Coil Diameter

Free Length

Active Coils

Loading

Target Deflection

Target Cycle Life

Material Properties

G = 79,300 MPa

Sut = 1800 MPa

Sys = 1080 MPa

ρ = 7850 kg/m³

Spring Characteristics

Spring Rate

5.87 N/mm

Spring Index (C)

7.50

Force @ Deflection

88.1 N

Solid Length

18.0 mm

Shear Stress

504 MPa

SF (Yield)

2.14

SF (Fatigue)

1.92

Natural Freq

196.0 Hz

Load-Deflection Curve

Goodman Fatigue Diagram

Operating at τ_m = 252 MPa, τ_a = 252 MPa ✓ Within safe zone

Design Summary

Geometry

Wire Ø: 2 mm

OD: 17.0 mm

ID: 13.0 mm

Total Coils: 10.0

Wire Length: 0.47 m

Performance

Max Deflection: 32.0 mm

Force @ Solid: 188.0 N

Energy Stored: 660.8 mJ

Mass: 11.6 g

Design Checks

✓ Spring index OK (4-12)

✓ Buckling OK (L/D ≤ 4)

✓ Coil clearance OK (2.13 mm)

⚠ Stress at solid exceeds yield