Precision engineering depends on tension you can trust. The NW Type No. 4554 constant force spring delivers steady, reliable resistance for high-precision projects, whether you're building custom devices, repairing delicate mechanisms, or developing smooth retracting components. This brand-new stainless steel spring holds its force evenly across its full range of movement.
Japanese industrial components are respected worldwide for exceptional manufacturing standards and exacting specs. Made from durable SUS304WPB stainless steel, this compact part weighs just 1.65 grams. It has a wire diameter of 0.65 mm, an outer diameter of 4.5 mm, a free length of 40 mm, and 49.5 active coils.
Wound in a right-hand direction with a reverse round hook, it offers a spring constant of 0.541 N/mm, an initial tension of 2.589 N, and a maximum extension of 17.6 mm: a small, precise piece of engineering ready for your next build.
NW Type constant force spring No. 4554, rated load 4.9 N. Made of SUS304WPB stainless steel wire with a 0.65 mm wire diameter, 4.5 mm outer diameter, 49.5 effective coils, and 40 mm free length. Features a reverse round hook, right-hand winding, spring constant of 0.541 N/mm (0.055 kgf/mm), maximum extension of 17.6 mm, and initial tension of 2.589 N (0.264 kgf). Unit weight: 1.65.
