Φ400 Electric Motorized Pulley Heavy-Duty Model 404 Cast Iron Flange End Cover HT250 Φ110 Bearing M16 Bolts

Model 404 Heavy-Duty Electric Motorized Pulley Flange End Cover

The Model 404 flange end cover is a heavy-duty sealing solution purpose-built for Φ400 medium electric motorized pulleys operating in the harshest industrial environments. Cast from HT250 high-strength grey cast iron with a reinforced thick flange plate, multi-bolt locking array, and large-diameter bearing chamber, it delivers unmatched reliability in mining, quarrying, and bulk material handling applications.

Key Specifications

Product Features

• High-Strength HT250 Casting: Superior impact resistance compared to standard HT200. Maintains structural integrity under heavy internal oil pressure and dynamic loading conditions.
• Thickened Multi-Bolt Flange: Reinforced flange plate with evenly distributed M16 high-strength bolts ensures uniform clamping force and zero warpage under heavy-duty operation.
• Large Φ110 Bearing Chamber: Generously sized center bore accommodates medium spherical roller bearings, delivering exceptional radial load capacity for mining-grade applications.
• CNC Precision Sealing Face: Computer-controlled turning achieves minimal flatness tolerance on the flange sealing surface, guaranteeing superior leak-proof performance.
• Heavy-Duty Interior Coating: Extra-thick red oil-resistant anti-rust primer withstands abrasive contamination from sand and dust particles entering the lubricant system.

Manufacturing Process

Coated Sand Precision Casting → High-Temperature Annealing (Stress Relief) → Heavy-Duty CNC Flange Face Turning → Large-Bore Center Bearing Chamber Boring → M16 Bolt Hole Tapping → Thickened Red Anti-Rust Primer Application → Final Quality Inspection

Applications

Engineered for Φ400 medium electric motorized pulleys in extreme-duty environments: sand and gravel mining conveyors, coal belt conveyor systems, and dock-side medium-capacity material handling lines.

Installation Notes

• Use matching M16 high-strength locking bolts; tighten diagonally in multiple stages for uniform assembly.
• Install thickened oil-resistant rubber gasket only — thin standard gaskets are prohibited due to heavy-load sealing requirements.
• Both end covers must be Model 404; never mix with 32-series end covers as dimensional incompatibility will cause failure.
• In mining dust conditions, inspect flange seal area for oil leakage every 200 operating hours.
• Lubricating oil fill level must not exceed the bearing seat height to prevent pressure-induced leakage.

Packaging

Finished precision parts: Individual bubble wrap, heavy-duty reinforced carton boxes with separate compartments. Bulk raw castings: Heavy steel pallets with full waterproof stretch wrapping and metal corner guards for edge protection during transit.