Factory custom paino steel black spiral double wire bending hook extension spring
0.1-20mm are available
All kinds of cars ,machinery, home appliance, electronic products, computers, power switches, sport equipment and more
inner-- PE bag, outer--standard carton box or you requirement
Manufacturing processes inspection per hour and per batch.
CNC spring machine imported from Japan, Germany and Taiwan and twisting machine ,loading machine, projector, spring tension and compression testing machine.
Extension springs supply a force by extending or pulling on them. Typically they are cylindrical helical springs made out round wire and have either machine loops or cross center loops. However they can be made conical, oval, barrel or virtually any other shape. The ends can be plane, extended, square or anything else you can imagine.