Heavy-Duty Girth Gears for Kilns, Mills & Dryers

Precision-Engineered for Maximum Uptime and Operational Reliability

The girth gear is the mechanical backbone of any rotary kiln, ball mill, or large industrial dryer. As the final drive component responsible for rotating the entire vessel, it operates under extreme mechanical stress and in harsh environments. Its structural integrity and manufacturing precision are paramount; a failure results in catastrophic downtime and massive production losses.

Yile Machinery is a world-class manufacturer of large-diameter, segmented girth gears. We combine advanced casting technology with large-scale precision machining to produce gears that deliver unparalleled reliability and service life in the most demanding industrial applications.

Key Features & Benefits:

• Segmented Construction for Simplified Logistics: Our girth gears are typically cast in two, four, or more segments. This design drastically simplifies transportation, handling, and on-site installation, especially for replacements in existing plants where access is limited.

• Superior Casting Integrity: We utilize high-strength alloy cast steels (e.g., ZG42CrMo) and employ advanced casting simulation software (CAE) and foundry techniques like vacuum degassing (VD) to eliminate internal defects. This ensures a homogenous, robust casting free from porosity or inclusions.

• Precision Machining for Smooth Operation: Despite their enormous size, our gears are machined to tight tolerances on large-scale CNC gear hobbing and milling centers. This guarantees a precise tooth profile for smooth pinion engagement, reduced vibration, lower noise, and minimized wear.

• Optimized Heat Treatment: Each gear segment undergoes a specialized heat treatment process (such as normalizing or quenching and tempering) to achieve the perfect balance of surface hardness for wear resistance and core toughness to withstand shock loads.

• Comprehensive Quality Assurance: Every gear is subject to rigorous quality control, including chemical composition analysis, mechanical property testing (tensile strength, hardness), and extensive non-destructive testing (NDT) like ultrasonic (UT) and magnetic particle (MT) inspection.

Your Partner in Rotational Equipment Reliability

From cement production to mineral processing, our girth gears are the trusted choice for keeping heavy industry moving.

Primary Applications:

• Cement Rotary Kilns

• Ball Mills & SAG Mills (Mining)

• Rotary Dryers

• Coal Pulverizing Mills

Whether you require a gear for a new installation or need to reverse-engineer a replacement for an aging asset, trust Yile Machinery to deliver a solution engineered for endurance.