Torsion spring

1. wire diameter as below:
0.1mm – 3.0mm wire
3.1mm – 12mm wire
12.1mm – 65mm wire
2. ISO9001:2000 certified
3. Competitive price and fast delivery
4. These springs are manufactured by fully automatic spring making machine,low cost

Physical parameters of torsion spring

d (wire diameter): This parameter describes the diameter of wire used as material for spring.
Dd (Shaft): This parameter describes maximal diameter of spring shaft in industrial applications.Tolerance for this parameter is (+-)2%(indicative).
Di (internal diameter): Internal diameter of a spring. It can be calculated by subtracting the wire diameter multiplied by 2 from the external diameter of a spring. Internal diameter in torsion springs decreases while the spring is working even up to shaft diameter. Tolerance for this parameter is (+-)2%(indicative).
De (external diameter): External diameter of a spring. It can be calculated by adding the wire diameter multiplied by 2 to the internal diameter of a spring. External diameter in torsion springs decrease while the spring is working. Tolerance for this parameter is (+-)2% with tolerance (+-) 0.1 mm
L0 (Free Length): WARNING: Free Length decrease while spring is working. Tolerance for this parameter is (+-)2%(indicative).
Ls (Leg Length): It is the distance from the center axis of the coil body to the end of the torsion springs' leg. Tolerance for this parameter is (+-)2%(indicative).
An (Maximum angle): Maximum acceptable rotation angle for the spring in degrees. Tolerance for this parameter is (+-)15 degrees (indicative).
Fn (Maximum force): Maximum acceptable force that can operate at the end of torsion springs' leg. Tolerance for this parameter is (+-)15%(indicative).
Mn (Maximum torque): Maximum acceptable torque (Newton * mm). Tolerance for this parameter is (+-)15%(indicative).
R (Spring rate): This parameter determines spring's resistance, while it is working. It is measured in Newton * mm / degree. Tolerance for this parameter is (+-)15%(indicative).
A1 & F1 & M1: (angle at torque or force) The following equation calculates the angle as a function of the torque: A1 = M1/R. In order to calculate the torque from the force, we use this equation: M = F*Ls
Leg position: There are 4 types of torsion springs' leg positions: 0, 90 ,180 or 270 degrees (see picture above).
Helix direction: A right-hand-wound spring loads in a counter-clockwise direction. A left-hand-wound spring loads in a clockwise direction. Both types are available in all sizes.

Materials of torsion spring

I (Inox steel): Inox 18/8 mark Z10 CN 18.09.

Tolerances of torsion spring

Leg position: (+-)15 degrees
Leg Length: (+-)3 %