Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When your stamping die or injection mould demands repeatable, low-force return action, an undersized or mismatched spring causes misalignment, premature wear, and costly downtime. Engineers and toolmakers who work with fine-blanking dies, plastic injection moulds, and precision jigs need a compression spring that delivers a predictable light load without over-stressing the surrounding tooling. These Blue Light Load TL series die mould springs are engineered for exactly that application.
Each spring is manufactured to the TL (light load) specification with a rectangular cross-section wire wound around a cylindrical coil body. Outer diameters span 25 mm (0.98 in), 30 mm (1.18 in), 35 mm (1.38 in), and 40 mm (1.57 in), with corresponding inner diameters of 12.5 mm, 15 mm, 17.5 mm, and 20 mm respectively. Available lengths range from 20 mm (0.79 in) up to 300 mm (11.81 in), covering a wide range of die set pocket depths. The blue colour coding follows the ISO 10243 light-load standard for instant visual identification on the shop floor.
Typical use cases include stripper plate return in progressive stamping dies, ejector pin return in plastic injection moulds, and preload mechanisms in precision measurement fixtures. Long-tail applications such as "light load die spring for stamping tool", "blue TL mould spring OD 30mm", and "ISO 10243 compression spring replacement" are all served by this range.
Colour-coded blue per ISO 10243 light-load classification, delivering consistent low spring force ideal for delicate stripper and ejector return applications.
Choose from OD 25, 30, 35, or 40 mm with matched inner diameters, covering the most common die spring pocket sizes in a single product family.
Available from 20 mm to 300 mm in fine increments, allowing precise free-length matching to your die set depth without shimming or stacking.
Flat-wire coil construction maximises solid height efficiency and provides a larger contact surface against the spring pocket seat compared to round-wire alternatives.
Surface treated to resist rust and oxidation in typical workshop and production environments, extending service life between scheduled maintenance intervals.
Dimensioned to ISO 10243 and JIS B 5012 standards, making these a direct drop-in replacement for worn TL-series springs without modifying existing tooling.
| Series / Load Class | TL — Light Load (Blue) |
|---|---|
| Outer Diameter (OD) | 25 mm / 30 mm / 35 mm / 40 mm (see variant options) |
| Inner Diameter (ID) | 12.5 mm / 15 mm / 17.5 mm / 20 mm (matched to OD) |
| Free Length | 20 mm – 300 mm (see variant options) |
| Wire Cross-Section | Rectangular (flat wire) |
| Colour Code | Blue |
| Standard | ISO 10243 / JIS B 5012 |
| Material | Alloy spring steel |
| Surface Treatment | See variant options |
| Deflection Rate | See variant options |
| Application | Die sets, injection moulds, precision fixtures |
Measure the spring pocket diameter in your die plate — the OD of the spring should be 0.1–0.3 mm smaller than the pocket bore for a sliding fit. Then measure the pocket depth and select a free length that gives your required working deflection at the specified load. For light-load (blue / TL) applications, the working deflection is typically 15–30% of the free length.
Blue indicates the TL (light load) classification under ISO 10243 and JIS B 5012. Each load class has a distinct colour: blue = light, red = medium, yellow = heavy, green = extra heavy. Always match the colour code to your original spring specification to maintain the correct spring force in your tooling.
TL light-load springs are designed for applications where low return force is required, such as stripper plates and ejector pins. For high-cycle stamping with significant stripping force, a medium (red) or heavy (yellow) load spring may be more appropriate. Consult your die design specification for the required spring force before selecting a load class.
The springs feature a surface treatment that provides resistance to rust and mild chemical exposure typical of stamping and moulding environments. For aggressive coolant or acidic environments, additional protective measures such as periodic re-oiling or stainless-steel alternatives should be considered.
Yes. These springs are dimensioned to ISO 10243 and JIS B 5012 standards, so they are direct drop-in replacements for any TL-series spring of the same OD and free length. No modification to the die plate or spring pocket is required.
Pre-compression (initial deflection) is a standard practice in die design and is acceptable provided the total deflection (pre-compression + working stroke) does not exceed the maximum allowable deflection for the spring — typically around 30–40% of free length for TL springs. Exceeding this limit accelerates fatigue and reduces service life.
The numbers refer to outer diameter × inner diameter in millimetres. TL25*12.5 has an OD of 25 mm and ID of 12.5 mm, while TL30*15 has an OD of 30 mm and ID of 15 mm. A larger OD spring carries a higher load at the same deflection percentage. Select based on your pocket bore size and the spring force required by your die design.
🛒 Select your Outer Dia. × Inner Dia. × Length above, then add to cart.
