Chat with us, powered by LiveChat
Toggle Nav
My Cart
Search
Advanced Search
Menu
Settings

ISO die springs

ISO Die springs

Tech Drawing - ISO Die springs
Go to technical information

Order Monday-Thursday before 15:30 and Friday before 14:45 and we’ll dispatch your order the same day with expected delivery within 2-10 days. This applies to all stocked die springs

See quantity discounts and prices by clicking on the shopping cart next to the required product.

Use the range sliders below to navigate around our large selection of ISO die springs quickly and easily.

What is an ISO die spring?
 

Die springs function like conventional compression springs. The more it is compressed, the more energy it releases. A die spring is produced from a rectangular spring wire, which provides greater force than ordinary round spring wire.

The wire in ISO die springs is a little more rounded than in RG die springs. This is due to the way the wire is produced. Characteristic of die springs is the significant force produced and a short spring travel. Virtually every size of die spring is divided into 4 colour categories, which are based on the force and travel of the die spring. See the colour groups under the table.

If a spring with either more or less force is required, a spring with the same dimensions – but with a different colour code – can be used, as the spring has the same installation dimensions.

The series is manufactured in accordance with the ISO 10243 standard. This ensures the high quality. Die springs are available with a maximum force (Fn) from 100 N to 11,344 N (10.2 kg - 1,156.76 kg.)

ISO die springs can be used in a myriad of applications that require large forces in confined spaces. Die springs are mainly used in the tool industry. For use under extreme load, we recommend using the RG series.

Please note that the colour code is not the same for ISO and RG die springs.

Show more Show less

Shop By
Shopping Options
Dh - Min. hole (mm)
Dd - Max shaft (mm)
L0 - Unloaded length (mm)
R - Spring constant (N/mm)
S1 - Travel at F1 (mm)
L1 - Length at F1 (mm)
F1 - Force in N at S1 (N)
Sn - Maximum travel (mm)
Ln - Max. loaded length (mm)
Fn - Maximum load at Ln (N)
Color

Items 1-10 of 403

Set Descending Direction
View prices - Add to Cart Dh
Min. hole (mm)		 Dd
Max shaft (mm)		 L0
Unloaded length (mm)		 R
Spring constant (N/mm)		 S1
Travel at F1 (mm)		 L1
Length at F1 (mm)		 F1
Force in N at S1 (N)		 Sn
Maximum travel (mm)		 Ln
Max. loaded length (mm)		 Fn
Maximum load at Ln (N)		 SKU Stock Tech Drawing Read More 3D CAD
10.00 5.00 25.00 10.00 6.25 18.75 63.00 10.30 14.70 103.00 R203-104 R203-104
10.00 5.00 25.00 16.00 5.00 20.00 80.00 9.50 15.50 152.00 R204-104 R204-104
10.00 5.00 25.00 22.10 3.75 21.25 83.00 7.50 17.50 166.00 R205-104 R205-104
10.00 5.00 25.00 36.90 3.75 21.25 138.00 6.20 18.80 229.00 R206-104 R206-104
10.00 5.00 32.00 8.50 8.00 24.00 68.00 13.10 18.90 111.00 R203-105 R203-105
10.00 5.00 32.00 13.00 6.40 25.60 83.00 12.20 19.80 159.00 R204-105 R204-105
10.00 5.00 32.00 17.50 4.80 27.20 84.00 9.60 22.40 168.00 R205-105 R205-105
10.00 5.00 32.00 27.90 4.80 27.20 134.00 8.00 24.00 223.00 R206-105 R206-105
10.00 5.00 38.00 6.80 9.50 28.50 65.00 15.60 22.40 106.00 R203-106 R203-106
10.00 5.00 38.00 11.90 7.60 30.40 90.00 14.40 23.60 171.00 R204-106 R204-106
  1. R203-104
    In stock: 305
    R203-104
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 25.00
    R - Spring constant (N/mm) 10.00
    S1 - Travel at F1 (mm) 6.25
    L1 - Length at F1 (mm) 18.75
    F1 - Force in N at S1 (N) 63.00
    Sn - Maximum travel (mm) 10.30
    Ln - Max. loaded length (mm) 14.70
    Fn - Maximum load at Ln (N) 103.00
  2. R204-104
    In stock: 601
    R204-104
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 25.00
    R - Spring constant (N/mm) 16.00
    S1 - Travel at F1 (mm) 5.00
    L1 - Length at F1 (mm) 20.00
    F1 - Force in N at S1 (N) 80.00
    Sn - Maximum travel (mm) 9.50
    Ln - Max. loaded length (mm) 15.50
    Fn - Maximum load at Ln (N) 152.00
  3. R205-104
    In stock: 382
    R205-104
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 25.00
    R - Spring constant (N/mm) 22.10
    S1 - Travel at F1 (mm) 3.75
    L1 - Length at F1 (mm) 21.25
    F1 - Force in N at S1 (N) 83.00
    Sn - Maximum travel (mm) 7.50
    Ln - Max. loaded length (mm) 17.50
    Fn - Maximum load at Ln (N) 166.00
  4. R206-104
    In stock: 293
    R206-104
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 25.00
    R - Spring constant (N/mm) 36.90
    S1 - Travel at F1 (mm) 3.75
    L1 - Length at F1 (mm) 21.25
    F1 - Force in N at S1 (N) 138.00
    Sn - Maximum travel (mm) 6.20
    Ln - Max. loaded length (mm) 18.80
    Fn - Maximum load at Ln (N) 229.00
  5. R203-105
    In stock: 42
    R203-105
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 32.00
    R - Spring constant (N/mm) 8.50
    S1 - Travel at F1 (mm) 8.00
    L1 - Length at F1 (mm) 24.00
    F1 - Force in N at S1 (N) 68.00
    Sn - Maximum travel (mm) 13.10
    Ln - Max. loaded length (mm) 18.90
    Fn - Maximum load at Ln (N) 111.00
  6. R204-105
    In stock: 8
    R204-105
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 32.00
    R - Spring constant (N/mm) 13.00
    S1 - Travel at F1 (mm) 6.40
    L1 - Length at F1 (mm) 25.60
    F1 - Force in N at S1 (N) 83.00
    Sn - Maximum travel (mm) 12.20
    Ln - Max. loaded length (mm) 19.80
    Fn - Maximum load at Ln (N) 159.00
  7. R205-105
    In stock: 219
    R205-105
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 32.00
    R - Spring constant (N/mm) 17.50
    S1 - Travel at F1 (mm) 4.80
    L1 - Length at F1 (mm) 27.20
    F1 - Force in N at S1 (N) 84.00
    Sn - Maximum travel (mm) 9.60
    Ln - Max. loaded length (mm) 22.40
    Fn - Maximum load at Ln (N) 168.00
  8. R206-105
    In stock: 209
    R206-105
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 32.00
    R - Spring constant (N/mm) 27.90
    S1 - Travel at F1 (mm) 4.80
    L1 - Length at F1 (mm) 27.20
    F1 - Force in N at S1 (N) 134.00
    Sn - Maximum travel (mm) 8.00
    Ln - Max. loaded length (mm) 24.00
    Fn - Maximum load at Ln (N) 223.00
  9. R203-106
    In stock: 520
    R203-106
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 38.00
    R - Spring constant (N/mm) 6.80
    S1 - Travel at F1 (mm) 9.50
    L1 - Length at F1 (mm) 28.50
    F1 - Force in N at S1 (N) 65.00
    Sn - Maximum travel (mm) 15.60
    Ln - Max. loaded length (mm) 22.40
    Fn - Maximum load at Ln (N) 106.00
  10. R204-106
    In stock: 30
    R204-106
    Dh - Min. hole (mm) 10.00
    Dd - Max shaft (mm) 5.00
    L0 - Unloaded length (mm) 38.00
    R - Spring constant (N/mm) 11.90
    S1 - Travel at F1 (mm) 7.60
    L1 - Length at F1 (mm) 30.40
    F1 - Force in N at S1 (N) 90.00
    Sn - Maximum travel (mm) 14.40
    Ln - Max. loaded length (mm) 23.60
    Fn - Maximum load at Ln (N) 171.00
Page
per page

SAE-AISI 9254 (G92540) Silicon-Chromium Steel. The wire is pulled extra fine, heat-treated and shot peened.
Working temperature between -200 ºC and +200 ºC
ISO die springs are manufactured in accordance with ISO 10243
These springs are not stainless steel

There are no tolerances for ISO die springs. They just need to stay within the minimum hole (Dh) and maximum shaft (Dd) dimensions.

If you want a PDF datasheet or a 3D CAD drawing of the spring in .step, .iges or .sat format, these can be downloaded for free by clicking on the 3D CAD symbol next to the item number in the table.

The colour labelling is done by powder coating without a special protection from corrosion.

Green
Minimun load - Longest travel
Blue
Medium load - medium travel
Red
High load - short travel
Yellow
Particularly high load - shortest travel

Usually right. The force and application is not affected by the direction of wind.

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

The service life of a spring is generally very difficult to define. A large number of parameters come into play, and it is therefore impossible to define a service life. Parameters with a significant influence on service life include: Installation, installation method, number of movements, vibrations, shocks, torsion, length of travel, non-axial travel, temperature, wear against other surfaces, environment of use, any cleaning agents, lateral impacts, etc.

The maximum force (Fn) and/or maximum travel (Sn) should not be exceeded, as this reduces the service life significantly. To avoid uncontrolled dynamic stress, die springs should always be fitted with a specific initial tension.

The longest service life is achieved with load and travel of max. 25% of the free length (L0).

If die springs in cars or other applications are fitted or replaced with our die springs, Sodemann Industrifjedre A/S cannot be held responsible for any differences in performance or damage.

This also applies to customers who visit Sodemann Industrifjedre A/S and get help and/or guidance.

It is not possible to get custom-made die springs.

Internet Explorer Incompatibility

This website unfortunately does not work well with Internet Explorer. We recommend using one of the following free browsers:

Copyright © 2025 Sodemann Industrifjedre A/S. All rights reserved.