Large Heavy Duty Φ500 Electric Motorized Pulley 505 Cast Iron Flange End Cover Φ140 Bearing M20 Bolts

Φ500 Electric Motorized Pulley Large Heavy-Duty Model 505 Cast Iron Flange End Cover HT250 Φ140 Bearing M20 Bolts

Model 505 Large Heavy-Duty Electric Motorized Pulley Flange End Cover

The Model 505 flange end cover is a large-scale heavy-duty sealing component engineered for Φ500 electric motorized pulleys operating in the most demanding industrial environments. Cast from HT250 ultra-high-strength grey cast iron and featuring an ultra-thick flange body, dense M20 bolt array, and Φ140 oversized bearing chamber, it is purpose-built for 24/7 continuous operation in mining, port, and steel mill conveyor systems.

Key Specifications

Product Features

• Ultra-High-Strength HT250 Casting: Engineered for alternating impact loads in 24-hour continuous heavy-duty conveying. Maintains structural integrity under extreme internal hydraulic pressure.
• Ultra-Thick Flange with Dense Bolt Array: Heavily reinforced flange plate with densely arranged locking bolts eliminates oil leakage even under high internal drum pressure.
• Φ140 Oversized Bearing Chamber: Extra-large center bore accommodates heavy-duty spherical roller bearings, delivering ultimate radial and axial load capacity for the most demanding applications.
• CNC Integrated Machining: Single-setup CNC turning and boring ensures top-tier dimensional accuracy on both flange sealing face and bearing bore, resulting in low-noise, vibration-free operation.
• Double-Layer Interior Protection: Two-coat red oil-resistant anti-rust primer system withstands prolonged lubricant immersion without peeling, rusting, or degradation.

Manufacturing Process

Coated Sand Precision Casting → High-Temperature Stress-Relief Annealing → Large-Scale CNC Integrated Turning and Boring → M20 Bolt Hole Tapping → Double-Layer Red Anti-Rust Primer Application → Rigorous Quality Inspection

Applications

Purpose-built for Φ500 large heavy-duty electric motorized pulleys in extreme environments: large-scale mining main conveyor belts, port bulk cargo handling lines, steel mill waste material conveyors, and quarry heavy-duty transfer systems.

Installation Notes

• Use M20 Grade 10.9 high-strength bolts exclusively; tighten diagonally in 3 staged passes for uniform flange seating.
• Install matching heavy-duty fluoroelastomer rubber gasket only — standard rubber gaskets cannot withstand heavy-load oil pressure and will rupture.
• Both drum ends must use Model 505 end covers as a matched pair; cross-model mixing is strictly prohibited.
• In port and steel mill continuous-duty applications, inspect flange seal integrity every 150 operating hours.
• Strictly follow drum lubricant fill specifications — overfilling will cause excessive oil pressure and end cover leakage.

Packaging

Single finished precision parts: Full bubble wrap encapsulation, independently packed in heavy-duty reinforced carton boxes. Bulk raw castings: Heavy steel pallet centralized stacking with full waterproof stretch film wrapping and metal corner guards at all four pallet edges for impact protection during transit.