Main Custom Gear Series

For All Custom Transmission Gear Demands

Changsha Eagle Machinery ( Changsha Eagle Machinery Equipment Co.,Ltd ) specializes in custom‑manufactured industrial gears and gear shafts for mining, cement and construction machinery.

We support full OEM & custom service, every component is tailor‑made strictly according to your drawings.

We can produce large girth gears up to 4000 mm in diameter. Spur, Helical, Bevel, Worm gears and ring gears are precisely forged and quenched, tailor-made strictly per your drawings with full QC inspection.

Spur Gears

Custom forged spur gears with full heat treatment, available in sizes up to 4m diameter for mining and cement machinery.

Spur Gear	Custom made per customer drawing
Precision	DIN 5 ~ DIN 10
Material	20CrMnTi / 20CrMnMo / 42CrMo / 45# Carbon Steel / 40Cr / 20CrNi2MoA
Heat treatment	Carburizing & Quenching + Tempering, Nitriding, Induction Hardening
Module	M0.5 ~ M10

Spur Gears Industrial Applications

Spur Gears are commonly used in conveyors, gearboxes, machine tools, textile machinery and small construction equipment.

Helical Gears​

High-precision helical gears with stable transmission performance, tailor-made per customer technical drawings.

Helical Gear	Custom made per customer drawing
Precision	DIN 5 ~ DIN 10
Material	20CrMnTi, 20CrMnMo, 42CrMo, 40Cr, 20CrNi2MoA, 45# Carbon Steel
Heat treatment	Carburizing & Quenching + Tempering, Nitriding, Induction Hardening
Module	M0.5 ~ M10
Helix Angle	5°‑45°, Left‑hand / Right‑hand available

Helical Gears Industrial Applications

Helical gears are extensively used in industrial gearboxes, mining machinery, fan drive systems, automotive transmissions and large conveyor equipment.

Bevel Gears​

High-precision custom bevel gears for angle transmission. Forged blanks with professional quenching treatment, customized sizes available for mining and construction equipment.

Bevel Gear	Custom made per customer drawing
Precision	DIN 5 ~ DIN 10
Material	20CrMnTi, 20CrMnMo, 42CrMo, 40Cr, 20CrNi2MoA, 45# Carbon Steel
Heat treatment	Carburizing & Quenching + Tempering, Nitriding, Induction Hardening
Module	M1 ~ M10
Tooth Type	Straight / Spiral Bevel available

Bevel Gears Industrial Applications

Bevel gears are widely applied in engineering machinery, mining equipment, vehicle drive axles, mixers and rotary equipment.

External ring gears & Internal ring gears

Custom large external and internal girth gears up to 4 meters diameter. Strict heat treatment ensures high wear resistance for ball mills, rotary kilns and heavy machinery. 

Ring Gear	Custom forged per customer drawing
Precision	DIN 6 ~ DIN 10
Material	20CrMnTi, 20CrMnMo, 42CrMo, 20CrNi2MoA, 40Cr, 45# Carbon Steel
Heat treatment	Carburizing & Quenching + Tempering, Nitriding, Induction Hardening
Module	M6 ~ M10
Max Outer Diameter	4000 mm

Ring Gears Industrial Applications

Girth gears (Ring Gears) are widely used in rotary kilns, rotary dryers, ball mills and other mineral processing machinery.