The spring with high load-bearing capacity is the core of the power master,the spring carrying capacity of the spring tools balancer of different item is different from the stroke length.
When you pull a heavy machine with a spring balancer, you're actually using the spring's recoil to pull the heavy machine fast.
Some spring balancers are more advanced, with automatic locking, for example SW1-3 and SW3-5.This kinds of retractor has memory, does not bounce back and forth, and is more convenient to use.
More information please kindly feel free us. professionally service hope will get your satisfaction. Regarding power master price and more information, please kindly feel free us. professionally service hope will get your satisfaction.
Shan Dong Finer Lifting Tools co.,LTD
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Website: http://www.cargotrolley.com/
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