Difference between close coiled and open coiled spring

Close Coiled Spring	Open Coiled Spring
Spring is wound tightly with no gap between two adjacent coils.	Spring is wound with sufficient gap  between adjacent coils.
Helix angle is less than 10°	Helix angle is greater than 10°.
Pitch of spring wire is smaller due to small helix angle.	Pitch of spring wire is comparatively larger as a result of larger helix angle.
Designed to undergo axial tension	Designed to undergo axial compression
Common application areas Spring balance Bike or cycle stand spring	Common application areas Spring-operated ball point pen Shock absorber in Vehicles

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