compression springs by size

The compression springs by size can be divided into: micro springs, small springs, medium springs, large springs and heavy springs.

We offer compression springs by size in various material types such as music wire (spring steel), hard pull, stainless steel, oil tempered, beryllium copper and phosphor bronze. Some of these springs can be plated with zinc, iridium gold or black oxide.

Compression springs by size are not defined with a specific direction of wind. Depending on production, the springs may be either right or left wound.

Our ranges of compression springs by sizes are below:

Outer Diameters from 0.036” (0.914 mm) to 9.250” (234.95 mm)
Free Lengths from 0.130” (3.302 mm) to 9.880” (250.952 mm)
Wire Diameters from 0.004 (0.102 mm) to 0.938” (23.825 mm)

d=Wire diameter in mm
De=External diameter (Di + (d2)) Dm=Mean diameter in mm (De – d) Di=Internal diameter in mm (De – (d2))
n=Number of effective elastic coils
nt=Coils total (n+2)
L0=Free unloaded length. Lo is for guidance only. Lo can vary slightly.
L1=Loaded length in mm at F1
L2=Loaded length in mm at F2
Ln=Max. loaded length in mm (min. length/max. load)
F1=Partial load in N (Newtons) at L1
F2=Additional load in N (Newtons) at L2
Fn=Maximum load in N (Newtons) at Ln (should not be used)
sn=Maximum travel (compression) in mm (Lo-Ln) (should not be used)
R=Spring constant in N/mm
Dd=Arbor diameter over which the spring can work
Dh=Hole diameter in which the spring can work
1 N=0,10197 Kg
1 Kg=9,80665 N

Compression spring By size

To measure a compression spring, you can use dial calipers, a micrometer, a ruler or tape measure for larger springs.When measuring a compression spring, the following five elements need to be determined:

Outer diameter is measured by placing your dial calipers on the outside of the coil’s width.
Inner diameter is defined as the width of the inside of a coil spring’s diameter measured from the center of the helix. Sometimes, inner diameter can be difficult to measure accurately. The formula to calculate inner diameter is I.D. = O.D. – 2d where 2d is two wire diameters.
Defined as the full length of an uncompressed spring, free length is easy to find. To measure, place your calipers on the full length of the spring.
Wire diameter is found by placing your calipers on the wire in the center of your spring.
Total coil count is defined as each full rotation and the remainder of the last coil.

The service life of the spring is difficult to define, because it is determined by different parameters, so it is impossible to define its service life. Parameters that have a significant impact on service life include: installation method, number of movements, vibration, shock, torsion, stroke length, non-axial stroke, temperature, wear to other surfaces, use environment, any cleaning agent, lateral impact, etc.

Compression springs by size, choose different size springs according to different needs, so as to make the spring service life longer. Applying the maximum load to the spring or exceeding the maximum load will shorten its service life and may cause it to deform permanently. Therefore, we recommend that you do not use more than the maximum stroke of the spring.

Compression springs are available in a variety of sizes and specifications, if you are sure of your need, please call or email us and we will provide you with the right compression spring for your application.

HSPR is a professional spring manufacturer, we have 37 years of production experience, obtained IATF16949, ISO9001, international quality system certification.