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Product Description
The drive system is the heart of a rotary kiln. The pinion, which transmits power to the massive girth gear, operates under some of the most punishing conditions imaginable: immense torque, constant high loads, and significant ambient heat. A failure in this single component leads to immediate, costly, and unplanned shutdowns, halting your entire production line.
Yile Machinery specializes in manufacturing forged, high-strength drive pinions specifically engineered for the unique demands of the cement industry. Our focus is on delivering components that provide maximum service life and predictable performance, securing your plant's uptime.
A kiln pinion's survival depends entirely on the quality of its material and the precision of its manufacture. Our process is designed to build in toughness and wear resistance from the very beginning.
Every pinion begins as a solid, forged blank of premium alloy steel. The forging process creates a dense, refined grain structure that is free from internal defects and possesses far greater toughness and fatigue resistance than cast or bar stock alternatives.
The pinion undergoes a controlled Quenching and Tempering (Q&T) process.
Benefit: This critical step develops a uniform, through-hardened microstructure across the entire gear tooth. It creates the perfect balance of high surface hardness for exceptional wear resistance against the girth gear, and a tough, ductile core to absorb the tremendous shock loads of kiln operation without fracturing.
After hardening, the gear teeth are finished using CNC profile grinding.
Benefit: Grinding produces a highly accurate and exceptionally smooth tooth surface. This ensures perfect, full-face contact with the girth gear, distributing the load evenly, reducing contact stress, minimizing vibration, and dramatically extending the life of the entire drive train—including the irreplaceable girth gear.
We manufacture our kiln pinions from certified, high-performance alloy steels chosen for their proven performance in heavy-duty applications.
34CrNiMo6 (DIN 1.6582 / AISI 4340): This is the premier material for highly stressed components. Its nickel-chromium-molybdenum composition provides an exceptional combination of high tensile strength, excellent toughness, and superior fatigue resistance, making it the ideal choice for handling the immense rotational torque of a cement kiln.
We know that the reliability of your kiln depends on our quality. Every pinion is validated through a strict, multi-stage inspection process.
Ultrasonic Testing (UT): The raw forging is 100% inspected to guarantee it is free of any internal imperfections.
Magnetic Particle Inspection (MPI): The finished gear teeth are inspected to ensure a flawless surface free of any cracks.
Hardness Testing: We verify that the heat treatment process has achieved the specified hardness for optimal wear resistance.
Gear Metrology Report: A full dimensional report is generated to confirm that the gear profile, pitch, and lead meet the design specifications (e.g., AGMA/ISO standards).
Complete Documentation Package: Each pinion ships with a full set of MTRs, heat treatment charts, and inspection reports for your records.
Our heavy-duty pinions are designed for the primary drive systems of:
Cement Kilns
Lime Kilns
Rotary Dryers
Large Grinding Mills (Ball, SAG)
Other large-scale rotating industrial equipment
Secure Your Production with a Reliable Kiln Pinion. Request a Quote.
Contact our engineering team with your technical drawings, gear data, and material specifications for a comprehensive quotation and engineering review.
