40-5 Clutch Spring: The "Clutch Return Core" of Low-Power Models

The 40-5 Clutch Spring is the "clutch return core" of low-power 40-5 models—it is cold-coiled from high-carbon spring steel, with a stable elastic coefficient of 8N/mm, which can provide sufficient pulling force at low engine speed to pull the clutch pad back to the disengaged position accurately, avoiding startup resistance caused by accidental clutch engagement at low speed.

Its surface is blackened for anti-corrosion, which can withstand oil and moisture erosion in the engine compartment for a long time, with an elastic attenuation rate of less than 5% (after 2000 hours of use); the size of the hooks at both ends is precisely adapted to the clutch bracket, with no risk of loosening after installation, adapting to high-frequency start-stop scenarios.

In 40-5 engine use, old clutch springs are prone to clutch pad failure to reset (startup difficulty, low-speed load) due to elastic attenuation and hook deformation. After replacing this spring, the clutch’s disengagement/engagement switching is more precise, the engine startup resistance is reduced by 80%, and the operation smoothness is significantly improved.

Whether for no-load startup of small generators or power switching of portable tools, the 40-5 Clutch Spring can provide reliable return support for the clutch of 40-5 models with "high elasticity + corrosion resistance" performance, being the core elastic component for "smooth power switching" of low-power equipment.