Specifications:
The document details specifications for EB-RW laminated constant torque springs, designed for 90° angular deflections. The springs are composed of two or more laminations, with a maximum of 8 springs per assembly to increase torque within limited space. The standard range is designed for a maximum angular movement of 90° with an average fatigue life of 5,000 cycles.

Torque Output:
The torque output is specified for different spring models (RW11 to RW19) with varying dimensions and torque values. The torque output is dependent on the number of leaves, with a maximum of 8 leaves recommended per set.

Key Parameters:

• T = Material thickness
• L = Spring length (reference only)
• RN = Free coil radius
• R3 = Torque drum radius
• RA = Optimum centre spacing

Standard Options:
The EB-RW springs are a short deflection form of spring motor, providing increased torque in minimal space. Special Spiroflex springs can be manufactured for higher fatigue lives and greater deflections. For custom requirements, the Technical Sales Department is available for assistance.

Recommendations:
When ordering, specify the spring reference and the number of leaves per set, e.g., RW 15/8. It is noted that no more than 8 leaves should be used together in any one set.