Yamaha 15HP Forward Gear: Independent Carburizing Hardness & Metallographic Report At Ningbo Gill Transmission Parts Co., Ltd., we know that outboard motor gears face constant high torque, vibration, and saltwater corrosion. Insufficient surface hardness or poor case depth often leads to rapid wear

Established in 1997, Ningbo Gill Transmission Parts Co., Ltd. is located in Ningbo, Zhejiang Province, covering over 25,000 square meters of modern production facilities. With more than two decades of experience in marine gear manufacturing, we specialize in producing high-precision outboard lower u

In March 2025, Ningbo Gill Transmission Parts Co., Ltd. participated in THE 28th China Shanghai International Boats Show (THE 28th CIBS), one of Asia’s premier marine industry events. The exhibition gathered suppliers, distributors, and marine enthusiasts from around the world, providing a perfect p

Involute gear base circles are critical to smooth, low‑noise power transmission in marine and outboard gearboxes. Learn what the base circle is, how it shapes tooth profiles, and why correct base circle design matters for reliable marine gears.

Learn what base pitch is, how it relates to circular pitch and involute tooth geometry, and why it matters so much for quiet, durable outboard gears. Discover practical design, inspection and troubleshooting tips from a marine gear manufacturing perspective.

Learn what addendum of gears really means in outboard gear design. Discover how tooth geometry affects noise, durability and load capacity in marine gearcases, and see how Ningbo Gill optimizes outboard gears for real‑world boat operation.

Design outboard spur gears that survive real marine conditions. Learn how to check spur gear strength, balance bending and surface durability, apply marine-appropriate safety factors, and avoid common gearbox failures with expert, field-tested guidance.

Design outboard gears with confidence. This expert guide explains how to clarify gear specifications, select materials and modules, avoid common marine failures, and work effectively with OEM manufacturers for quiet, durable outboard transmissions.

This in-depth guide explains how experienced engineers design spur gear shapes—rim, web, hub, and tooth form—for marine and outboard gearboxes. It covers practical load, material, and manufacturing considerations, real-world case insights, and SEO-friendly structure for technical websites.