Short Answer

A girth gear is a type of large ring gear specifically designed for heavy rotating equipment such as rotary kilns and ball mills. A ring gear is a general term for any circular gear with teeth. In cement, mining, and metallurgy industries, "girth gear" usually refers to large external gears used for power transmission.

Girth Gear vs Ring Gear: Key Differences

In heavy industries, the terms girth gear and ring gear are often confused. Although they look similar, their applications are different.

A girth gear is a large external gear installed around the shell of rotating equipment, including:

• Rotary kilns
• Ball mills
• SAG mills
• Dryers

It works together with a pinion gear to transmit high torque and drive continuous rotation.

A ring gear is a broader mechanical term referring to any circular gear with teeth around its circumference. It can be used in many applications, from automotive systems to industrial machinery.

Main Difference:

• Girth Gear: Large industrial gear used for heavy rotating equipment.
• Ring Gear: General name for circular toothed gears.

All girth gears are ring gears, but not all ring gears are girth gears.

Tenfaye Large Cast Steel Girth Gear Manufacturing

Tenfaye specializes in manufacturing large cast steel components for cement, mining, metallurgy, and heavy industries.

Our capabilities include:

• Girth gear diameter up to 16 meters
• Single casting weight up to 150 tons
• Alloy cast steel materials
• CNC machining
• Heat treatment and UT/MT inspection

With advanced casting technology and strict quality control, Tenfaye provides reliable girth gears for global industrial applications.