Compression Spring 2.5mm Wire Diameter 20-100mm Length Pressure Small OD 12-34mm

Measure the bore or housing inner diameter your spring will sit inside, then select an OD that is 0.5–1.5mm smaller than the bore to allow free movement without binding. If the spring rides on a guide rod, the rod outer diameter should be at least 1mm smaller than the spring inner diameter (ID = OD minus twice the wire diameter, so ID ≈ OD − 5mm for this 2.5mm wire series).

Load capacity depends on the specific OD, free length, and material. As a general guide, 2.5mm wire springs in this OD range typically handle light-to-medium loads suitable for return mechanisms, clamping fixtures, and valve applications. For exact spring rate and maximum load values, contact us with your selected variant dimensions.

Corrosion resistance depends on the material and surface finish of the specific variant. If your application involves moisture, chemicals, or outdoor exposure, please contact us to confirm the finish available for your chosen size before ordering.

Yes. The closed and ground ends provide flat, stable seating that suits automated assemblies where consistent axial alignment is required. These springs are commonly used in robotic actuator return mechanisms, end-effector clamping, and sensor-triggered latch systems. Verify the spring rate and travel against your cycle load requirements before finalizing your design.

Free length should equal your desired working length plus the required deflection. For example, if your mechanism compresses the spring 20mm from its resting position and you need 40mm of working clearance, select a free length of approximately 60mm. Always add a safety margin of 10–15% to avoid coil bind at maximum compression.

Packs of 5 are ideal for prototyping (test multiple configurations), small-batch production (consistent parts from the same batch), and maintenance stock (replace worn springs without reordering delays). The per-unit cost is also lower compared to single-piece sourcing for most project quantities.

OD (outer diameter) is the widest measurement across the outside of the coil. ID (inner diameter) is the clear opening inside the coil — for this 2.5mm wire series, ID ≈ OD − 5mm. Measure your bore or housing to match OD, and measure your guide rod to match ID. Both dimensions are critical for a properly guided spring that does not bind or buckle.