Spring Back Tester
Determine the elasticity of your wire
The springback properties of your wire
A springback tester is used to measure how much a metal (or wire/sheet) elastically returns to its original shape after being bent, formed, or wound. Its purpose is to quantify this “springback” so manufacturers can adjust tooling and process parameters to achieve accurate final dimensions and consistent quality in formed parts. Springback testing is valuable in enameled wire production because it directly indicates the softness and elastic behavior of the conductor, which strongly affects winding performance and final coil quality.
What springback is
When metal is bent or formed, part of the deformation is elastic and recovers once the load is removed, causing the angle or curvature to open up slightly; this effect is called springback. If not controlled, springback leads to dimensional errors, poor fit in assemblies, and more scrap or rework.
Role of a Spring Back Tester
A springback tester bends or winds a standardized specimen of wire in order to measure how much the wire elastically recovers after being bent, which reflects its elastic deformation behavior. These results are closely linked to copper quality and annealing degree, so springback testing becomes a quick proxy for whether the base wire metallurgy and thermal treatment are within specification.
Where it is used
Springback testers are used in sheet metal and wire processing, such as stamping, bending, and can or tube production, where tight tolerances on bend angle or curvature are critical. They are particularly useful in plants that may not have full tensile-testing capability but still need a quick in‑plant check on formability and springback of incoming or in‑process material.
Benefits in winding and coil forming
Soft, well‑annealed wire shows a smaller springback angle, so it conforms better to tight winding geometries and helps maintain coil shape and slot fill factor. If springback is too high, coils can “open up,” change diameter, or not fit properly in slots or bobbins, which harms packing density and may cause assembly or performance issues.
Preventing production and customer problems
Abnormal springback values correlate with problems such as wire breakage during winding, poor coil formation, and a stiff “feel” that operators often notice even when other parameters look acceptable. Routine springback testing allows early detection of process drift (for example, insufficient annealing or excessive cold work), reducing scrap, machine downtime, and field complaints.
Types of Spring Back Testers
If you need quick and specific information about our Spring Back Testers, you can follow these link to the datasheets.
SB0, SB1 Spring Back tester for round wire less than 1.6 mm
SB3, SB4 Spring Back tester for round or flat wires from 1.6 to 8.0 mm
SB5, SB6 Spring Back tester for wire from 0.07 mm to 1.60 mm, wire diameter from 1.60 to 8.00 mm and strip wire.
Or please contact our sales department for more information.
