Extension springs with english hooks

Description of parameters for extension springs with english hooks

Physical parameters

• d (wire diameter): This parameter describes the diameter of wire used as material for spring.
• De (external diameter): External diameter of a spring concerns both hooks and coils. Tolerance for this parameter is (+-)2%(indicative).
• H (Hole): This is minimum diameter of hole in which spring can work. Tolerance for this parameter is (+-)2%(indicative).
• Ln (Maximum length): Maximum acceptable extension length for a spring. It is also the maximum extension for static applications. Tolerance for this parameter is (+-)15%(indicative).
• Fn (Maximal force): Maximal acceptable force which can operate on a spring. It is also the maximum force for static applications. Tolerance for this parameter is (+-)15%(indicative).
• L0 (free length): Free length is measured in spring's free state. Tolerance for this parameter is (+-)2%(indicative).
• Nr of coils: This is a total number of coils in a spring - in the picture above it is equal to six.
• R (Spring rate): This parameter determines spring's resistance, while it is working. It is measured in 1 DaN/mm = 10 N/mm. Tolerance for this parameter is (+-)15%(indicative).
• L1 & F1 (length under charge F): The charge F1 at length L1 can be calculated using the equation : F1 = Fn - R(Ln-L1). Equation derived from the previous for calculating L1 = Ln - (Fn-F1)/R.
• Hooks: Extension springs with English hooks have both hooks closed forming a ring. Both hooks lie in the same plane.

Reference Number: All springs are identified by a unique reference: type . (De * 10) . (d * 100) . (L0 * 10) . material ; for english extension springs, type is a letter "T", materials are identified by the following letters: "A" or "I". Example:T.063.090.0100.A is the extension spring with the external diameter 6.3 mm and the free length 10mm, produced from 0.9 mm music wire .

VANEL’S COMPRESSION SPRINGS SHOP

COMPRESSION SPRINGS are open-coil helical springs wound or created to oppose compression along the center of wind. Helical Compression Springs are one of the most typical steel spring configuration. Normally, these coil springtime's are either put over a pole or equipped inside a hole. When you placed a load on a compression coil spring, making it much shorter, it pushes back versus the load as well as attempts to return to its original length. Vanel Compression spring offer resistance to direct compressing forces (push), and are in reality among one of the most reliable energy storage space devices available.

Key Parameters:

Dimensions: Outer Diameter, Inner Diameter, Wire Diameter, Free Length, and Solid Height.

Free Length is the overall length of a spring in the unloaded position.

Solid Height is the length of a compression spring under sufficient load to bring all coils into contact with adjacent coils.

Spring Rate (stiffness)

Spring Rate is the change in load per unit deflection in pounds per inch (lb. /in.) or Newtons per millimeter (N/mm).

Unit of Measures

Lee Spring's Stock Springs are specified in both English (Imperial) or metric units. Be sure to specify the preferred unit of measure when looking for a Stock Spring using Lee Spring's search engines.

Phone:  +44 20 8123 0339   E-Mail : sales@vanel.com