Compression Spring (Free Size, Stainless Steel Spring Wire)

Specifications

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How to choose Springs

Points to check when selecting, with the values for this product (Compression Spring (Free Size, Stainless Steel Spring Wire)).

1. 1. Select the Spring Rate from the Required Force

   The spring rate k is the load required to deflect the spring by 1 mm. Multiply it by the deflection at installation and at operation to confirm that the required force can be obtained. Listed products range widely from 0.007 to 9.91 N/mm, and a margin should be allowed for variation, including the spring rate tolerance (for example, ±10%).

2. 2. Keep Within the Maximum Load and Deflection Limits

   Using the spring beyond its maximum load or maximum deflection causes set (permanent deformation) or breakage. Confirm that the load at the maximum point of the operating stroke is within the maximum load, and for compression springs, that the solid height is not reached.

3. 3. Installation Space, Outside Diameter, and Free Length

   This product: Outer diameter D 5–60 mm

   Check that the outside diameter fits the hole or housing, and that the inside diameter does not interfere with the shaft it passes over (applicable shaft diameter). The free length is the length under no load; the difference from the installed length is the initial deflection. Because the coil diameter changes under load, allow sufficient clearance.

4. 4. Select a Material Suited to the Operating Environment

   This product: Material SUS304-WPB

   Piano wire SWP-A has high strength but is prone to rust, and many versions are supplied with rust-preventive oil treatment. For humid environments or environments subject to washing, stainless steel such as SUS304-WPB is a candidate. For strongly corrosive environments such as seawater, titanium is a candidate.

5. 5. Extension Springs: Initial Tension and Hook Shape

   Close-wound extension springs have initial tension, the load required before the spring begins to extend. For applications requiring movement with a small force, check the initial tension value. Also check that the hook shape, such as reverse loop, 90-degree, or 180-degree, matches how the mating part is engaged.

6. 6. Torsion Springs: Angle and Arm Direction

   For torsion springs, check the torque at the operating angle (torsion spring rate × angle) and the arm length. The winding direction should match the direction of twist, and it is common to use the spring in the direction that winds it up. For free-size products, also specify the bending direction.

This guide was written by AI based on the listed products' documents and specification items.

About Springs and all products

Description

Material SUS304-WPB, winding direction right-hand. Price tables are separated for outer diameters of 5 to 27 mm and 28 to 60 mm. Quantities of 1 to 50 pieces ship in 3 days. Spring constant can be checked using an online simple calculator.

FAQ

Q. What is the range of outer diameter and wire diameter for free size compression springs?

A. Outer diameter D is 5 to 60 mm, and wire diameter d is 0.4 to 5.0 mm.

Q. In what increments can the free length of free size compression springs be selected, and what is the maximum range that can be specified?

A. Free length L ranges from 11 to 400 mm and can be specified in 1 mm increments.

Q. What are the material and winding direction of free size compression springs?

A. The material is SUS304-WPB and the winding direction is right-hand.

Q. How can the spring constant of free size compression springs be checked?

A. The spring constant can be checked using an online simple calculator.

Q. Do free size compression springs have separate price tables based on outer diameter?

A. Yes. Price tables are separated for outer diameters of 5 to 27 mm and 28 to 60 mm.

Written by AI based on the content of the source documents.

Source documents

• Catalog スプリングネット 製品カタログ（ばね類） 178 pages Open page 48
  Found on: https://www.samini.co.jp/catalog_list/