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

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

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.

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 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.