Heavey Duty Extension Spring
The largest wire diameter is 11.0mm. Though the normal ratio between wire diameter and inside diameter is 1:2.5, we have successfully achieved 1:1. We were admired and welcomed by our overseas customers for our ability to produce tension spring of such difficulties.
Precise Extension Spring
An array of out precise extension machines with capacity of producing springs of min.0.1mm wire diameter with our projector, extension tester, and endurance tester, the quality of our product is best guaranteed.