For shaft, we have different models with different length like hollow shaft, solid shaft and shaft with keyway. Also, we can customized according to customers' needs. We use high quality galvanized steel to prevent rusting, it is more durable.

Diameter 1" (25.4mm), provided with a drawn 1/4"

keyway over full length

Weight per meter: 3.85 kg/m

For sectional door use

FAQ:
  Q 1. Are you trading company or manufacturer ?
  A.  We are the OEM factory in  Hefei , China, and has more than  10  years experience  in garage extension  spring.

Q 2. What's the payment term? 
A. We accept TT,30% deposit and 70% balance before shippment.

Q 3. How's the delivery time ? 
A.  It will take 10-25 days for 20ft container

Q 4. Tell me the standard of package? 
A. Standard Packaging, Wooden Carton Or as per customers' requirements
 
Q 4. Does sample free?
A. Free sample: We would love to send you free samples which have in stock, and you 
    just need arrange shipment.

Q 5. Would you accept to make mold as our request
A. Yes,we do and mold cost can be return when you reach the enough quantity

Q 6. What information should I give to you for inquiry?

A.  If you have drawings or samples,pls feel free to send us,and tell us your special requirements such as material ,tolerance,surface treatments and the amount you need,ect .



Hefei Wang Qin Spring Co., Ltd. was founded in 2006, is located in one of the National Garden - Hefei City, Anhui province. We professionally produce all kinds of luxury garage doors, industrial doors, shutter doors in matching torsion springs and tension springs. In addition, we are also supporting the production with all kinds of flange, steel wire wheel, and a variety of other accessories, etc..
Since the establishment of the company, the introduction of spring research, design of outstanding talent, focus on designing and producing automatic door balance system spring. With professional producing and testing equipments, from  selecting of material properties to design each door spring to match, controlling the production quality strictly until after-sales service, All reflect Qin Yong Spring Factory's enterprise spirit " More excellence, Quality first, All satisfy customers requirements".
Our company's springs have the good quality ,accurate design and advanced processing technology. So in the case of without loaded motor(or power cut), our spring still can maked the door relaxed open to reach manual effect. In the case of  loaded motor, it can reduce the motor'working load, prolong the service life. Our company's products have a good reputation at home and abroad, and become the first choice at home and abroad enterprises..
 Our company adhere to "customer first, quality first, reputation first" for the enterprise management concept, and sincerely hope the majority of door enterprises  can cooperate and develop in common.