Custom-Made Springs (Special Order Springs)

Specifications

How to choose Springs

Points to check when selecting, with the values for this product (Custom-Made Springs (Special Order Springs)).

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

   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

   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

Covers a wide range of sizes from extra-heavy to ultra-fine, and can produce heat-resistant, corrosion-resistant, and acid-resistant materials, tip rounding, tapered shapes, torsion springs, forming, and wire-formed products. Equipped with coiling, end grinding, heat treatment, and load testing facilities. Can be ordered one piece at a time via the web (Spring Net).

FAQ

Q. Can Custom-Made Springs (Special Order Springs) be manufactured in single pieces?

A. Yes, we can manufacture single pieces. Springs can be ordered to specific material, size, shape, and application requirements.

Q. What materials and processing methods are supported for Custom-Made Springs (Special Order Springs)?

A. We support heat-resistant, corrosion-resistant, and acid-resistant materials. We can produce tip rounding, tapered shapes, torsion springs, forming, and wire-formed products.

Q. What size range is available for Custom-Made Springs (Special Order Springs)?

A. We cover a wide range from extra-heavy to ultra-fine sizes. For extra-heavy, we have a record of 50mm wire diameter and load capacities of 10t to 20t. For ultra-fine, examples include 0.02mm wire diameter and 0.1mm coil outer diameter. Tip rounding is available for wire diameters of approximately 0.08 to 3Φmm.

Q. What applications are Custom-Made Springs (Special Order Springs) used for?

A. They are used for repair parts, dedicated springs, prototypes, machinery, electrical equipment, automotive, machine tools, precision instruments, medical use, and other applications.

Q. How long does it take to receive a quotation and shipment for Custom-Made Springs (Special Order Springs)?

A. Quotations for orders of 100 pieces or fewer are provided the same day. Orders of 10 pieces or fewer are shipped within 3 days after receipt of order.

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

Source documents

• Catalog ORDER MADE SPRING BOOK（オーダーメイドばね） 8 pages
  Found on: https://www.samini.co.jp/catalog_list/