Wire Dia.3mm OD 32mm-50mm L 20mm-100mm Springs Compression Spring Steel

Measure the inner diameter of your spring housing or the outer diameter of your guide rod. The spring OD should be slightly smaller than the housing bore (typically 0.5–1 mm clearance) and larger than the guide rod OD to allow free travel without binding. Select from the 32–50 mm OD options to find the closest match.

The free length should be longer than your required working length by at least the amount of travel (compression stroke) you need. For example, if you need 20 mm of travel and your compressed height is 30 mm, choose a free length of at least 50 mm. Available lengths run from 20 mm to 100 mm in this product family.

These carbon steel compression springs are designed for general-purpose mechanical use with consistent spring geometry under repeated compression. For high-cycle fatigue applications (millions of cycles), consider specifying the exact spring rate and confirming the stress ratio with your design requirements. Contact us to confirm suitability for your specific load and cycle count.

Carbon steel springs offer good mechanical properties but have limited corrosion resistance in wet or chemically aggressive environments. For outdoor, humid, or corrosive settings, consider applying a protective coating after installation or contact us about alternative material options. For dry indoor mechanical assemblies, carbon steel performs reliably.

Yes. These compression springs are well-suited for 3D printer Z-axis bed leveling, CNC fixture clamps, robotic gripper return mechanisms, and general automation jigs. Select the OD and free length that match your guide rod and travel requirements. The closed and ground ends provide stable seating on standard spring pockets.

The 1 pcs option is ideal for prototyping, testing, or single-unit repairs where you need just one spring. The 5 pcs pack is available for the larger OD sizes (42–50 mm) and offers a cost-effective way to stock spares or fulfill small production runs without ordering in bulk.

Check three key dimensions: (1) wire diameter — 3 mm for all variants; (2) outer diameter — must clear your housing bore with 0.5–1 mm gap; (3) free length — must exceed your compressed height plus required stroke. If you are unsure, order a single-piece sample of your target OD and length to test fit before committing to a larger quantity.