Original reinforced steel body - Reinforced steel housing built with SGCC galvanized steel plate and SPCC cold-rolled plate surface; finished with powder material for durable, high-load capability. Durable pulley bearing for long life - Ball bearing pulley uses stainless steel and a high-strength elastic spring; includes a 20% steel component to withstand repeated high-load operations. Three-stage locking construction with roller bearings - Three-position locking design paired with roller bearings to ensure secure operation and stable performance. Enhanced safety and protection - SGCC galvanized steel plate and SPCC cold-rolled plate surface with powder material; explosion-proof design and high-temperature fire resistance for safer operation. Use scenarios - Heavy-duty belt drive systems and conveyors in manufacturing or packaging lines requiring reliable load handling and long service life. - Environments with elevated temperatures or potential explosion risks where explosion-proof and fire-resistant components are required. - Repetition-heavy material handling or lifting assemblies that benefit from a robust, low-maintenance pulley system.