Project Overview

The Philippines’ coastal amusement parks are humid and rainy, with Ferris wheel lifts under alternating heavy dynamic loads. We made a heavy-duty external-gear slewing ring matching Kato NK400 standards to support safe, round-the-clock operation.

High-strength 42CrMo steel – after precision turning, the raceways are integrally quenched and hardness-tested for abrasion resistance under cyclic loads. Our team assembles the rolling elements, then runs gear meshing tests to optimize clearance for smooth, low-noise rotation. All dimensions are verified against confidential drawings.

Multi-layer waterproof wrapping and reinforced sealing resist tropical rain and humid air; custom grease channels reduce friction. We photo-document everything from heat treatment to assembly testing to waterproof wooden case packing. Designed for 2,000+ hours per year, this large external ring delivers durable, secure support for Ferris wheel lifting facilities across the Philippines.

Technical Highlights

  • Custom triple-lip seal design to prevent dust and moisture ingress
  • Induction-hardened raceway: 55–58 HRC surface, 3.5 mm case depth
  • External gear profile: module m=6, Z=168, 20° pressure angle
  • Load capacity: 680 kN axial, 135 kNm overturning moment
  • Grease refill interval extended from 80h to 200h with polyurea-based high-temp grease
  • Pre-assembly ultrasonic inspection and 360° torque test before shipment

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