High-Quality Replacement Rotary Kiln Components for Cement Kilns
AGICO is a professional manufacturer of cement equipment and spare parts with over 20 years of experience. We provide durable, high-strength, and precisely engineered rotary kiln spare parts for cement plants, lime kilns, metallurgical plants, and mining operations worldwide.
Rotary kiln spare parts are essential to the smooth operation of the kiln. The quality of these parts directly affects the service life, operation efficiency, and product quality of the kiln. AGICO uses high-quality materials, advanced heat treatment, and strict quality control to ensure every part meets the highest standards.
We supply a complete range of kiln replacement parts — from core load-bearing components like kiln tyres, support rollers, and support roller shafts to transmission parts like girth gears and pinions, as well as sealing systems. Every part is custom-made according to customer drawings and specifications, ensuring seamless integration with your existing equipment.
Rotary Kiln Spare Parts We Supply
| Spare Part | Materials | Weight Range | Application |
|---|---|---|---|
| Kiln Tyre / Riding Ring | ZG310-570, ZG35CrMo, ZG42CrMo | 5–80 tons | Supports full weight of rotating kiln |
| Support Roller / Carrier Roller | ZG230-450, ZG270-500, ZG35, ZG55, ZG35CrMo, ZG42CrMo | 0.3–50 tons | Bears kiln weight and enables smooth rotation |
| Support Roller Shaft | 42CrMo, 34CrNiMo6 (forged); ZG42CrMo, ZG55 (cast) | Custom | Connects roller to bearings; transmits load and torque |
| Thrust Roller | ZG35, ZG42CrMo | 2–20 tons | Controls axial movement of kiln shell |
| Girth Gear / Bull Gear | ZG310-570, ZG35CrMo, ZG42CrMo | 5–80 tons | Drives kiln rotation |
| Pinion | Alloy Steel | 500–5,000 kg | Transmits motor power to girth gear |
| Kiln Shell | Q235-B, Q245R, 20g | Custom | Main body of rotary kiln; provides structural foundation |
| Kiln Seal / Sealing Device | Heat-Resistant Alloy Steel | Custom | Prevents air leakage and dust escape |
Kiln Tyre / Riding Ring
The kiln tyre (also called the riding ring or rolling ring) is a large annular steel casting mounted on the kiln shell. It supports the entire weight of the rotating kiln — which can be hundreds of tons — and transfers it to the support rollers below. The tyre also strengthens the kiln shell and helps keep it round.
AGICO kiln tyres are made of high-strength cast steel and feature advanced heat treatment for uniform hardness. Available in rectangular (solid) and box (hollow) cross-section types. Precision machining ensures accurate fit with the kiln shell.
Materials: ZG310-570, ZG35CrMo, ZG42CrMo
Weight Range: 5–80 tons (customizable)
Surface Hardness: ≥HB170
Applications: Cement rotary kilns, lime kilns, rotary dryers, rotary coolers
Support Roller
The support roller (also called the carrier roller or kiln roller) is a large cylindrical steel casting positioned underneath the kiln shell. It bears the full weight of the rotating kiln and transfers it to the foundation below. The tyre and support rollers work together as a pair.
AGICO support rollers feature crowned design for automatic alignment and reduced wear. Surface hardness reaches HRC 45–55 after heat treatment. Available in solid and assembled types. Precision machining to ISO 6–7 tolerance ensures smooth operation.
Materials: ZG230-450, ZG270-500, ZG35, ZG55, ZG35CrMo, ZG42CrMo
Weight Range: 0.3–50 tons (customizable)
Diameter: φ400 mm – φ2,000 mm (customizable)
Surface Hardness: HRC 45–55
Support Roller Shaft
The support roller shaft connects the support roller to the bearing system. It transmits the load from the roller to the foundation and enables smooth rotation of the entire assembly. Together with the support roller, bearing housing, and bearings, it forms the support roller set that carries the full weight of the rotating kiln.
AGICO offers both forged (42CrMo, 34CrNiMo6) and cast (ZG42CrMo, ZG55) shafts. Hot assembly technology ensures a tight, reliable fit. Quenching and tempering heat treatment provides balanced strength and toughness. 100% NDT testing (UT and MT) ensures no hidden defects.
Forged Materials: 42CrMo, 34CrNiMo6
Cast Materials: ZG42CrMo, ZG55
Diameter: Up to 800mm (forged); up to 1,200mm (cast)
Surface Hardness: HB 200–280
Thrust Roller
The thrust roller controls the axial movement of the kiln shell and prevents the kiln from sliding up or down along its slope. It is an essential component for maintaining the kiln’s proper position during operation.
AGICO thrust rollers are made of high-strength cast steel with excellent wear resistance. Precise alignment ensures accurate axial control. Durable design for long-term operation under heavy loads.
Materials: ZG35, ZG42CrMo
Weight Range: 2–20 tons (customizable)
Applications: Cement rotary kilns, lime kilns, metallurgical rotary kilns
Girth Gear / Bull Gear
The girth gear (also called the bull gear) is a large ring gear fixed to the kiln shell. It meshes with the pinion to transmit power from the motor and drive the kiln rotation. The girth gear is one of the most important transmission components of the rotary kiln.
AGICO girth gears are made of high-strength cast steel with precision-cut teeth for smooth engagement. Advanced heat treatment ensures long service life. Available in various tooth profiles and sizes.
Materials: ZG310-570, ZG35CrMo, ZG42CrMo
Weight Range: 5–80 tons (customizable)
Pinion
The pinion is a small gear that meshes with the girth gear. It transmits power from the motor to the girth gear, driving the kiln rotation. The pinion and girth gear work together as a pair in the transmission system.
AGICO pinions are made of high-strength alloy steel with precision-cut teeth for smooth and reliable power transmission. Advanced heat treatment ensures long service life and wear resistance.
Material: Alloy Steel
Weight Range: 500–5,000 kg (customizable)
Kiln Seal / Sealing Device
Kiln seals are installed at the feed end and discharge end of the kiln. They prevent air leakage and dust escape, improving thermal efficiency and reducing environmental pollution.
AGICO kiln seals are made of heat-resistant alloy steel with effective sealing performance. Durable design for harsh operating conditions.
Material: Heat-Resistant Alloy Steel
Weight Range: Custom
Applications: Cement rotary kilns, lime kilns, chemical rotary kilns
Kiln Shell
The kiln shell is the main body of the rotary kiln. It is a large cylindrical structure made of steel plates rolled and welded together. The shell contains the refractory lining and rotates slowly during operation. It provides the structural foundation for all other kiln components — tyres, girth gear, and drive system — and directly withstands high temperature, mechanical load, and material movement.
AGICO kiln shells are manufactured from high-quality steel plates such as Q235-B, Q245R, and 20g. The plate thickness varies by section — generally 18–40 mm, with thicker plates (up to 85 mm) used under the tyres and in high-temperature zones. Each shell section is precision-rolled, automatically welded, and undergoes post-weld heat treatment to relieve stress and ensure dimensional accuracy. 100% NDT testing (UT) is performed on all force-bearing surfaces before delivery.
Materials: Q235-B, Q245R, 20g (customizable)
Thickness: 18–85 mm (varies by section)
Applications: Cement rotary kilns, lime kilns, metallurgical rotary kilns, chemical rotary kilns
Why Choose AGICO Rotary Kiln Spare Parts?
- Professional Technical Support – Our engineers provide installation guidance and after-sales service to ensure proper fit and operation.
- Premium Quality Materials – We use high-strength cast steel grades (ZG230-450 to ZG42CrMo) for long service life and reliable performance.
- Custom Manufacturing – Every part is made according to customer drawings or samples with exact dimensions.
- Strict Quality Control – Every product undergoes non-destructive testing (UT, MT, PT) to eliminate hidden defects.
- Competitive Factory Price – Direct supply from our factory saves your cost. No middlemen.
- Fast Delivery – We produce custom orders efficiently and ship worldwide via sea, air, or land.
Rotary Kiln Spare Parts Applications
AGICO rotary kiln spare parts are widely used in:
- Cement plants – Rotary cement kilns, cement production lines
- Lime plants – Lime rotary kilns, lime production lines
- Metallurgical industry – Metallurgical rotary kilns, ore processing
- Chemical industry – Chemical rotary kilns, activated carbon production
- Other industries – Rotary dryers, rotary coolers, and other rotary processing equipment
Frequently Asked Questions (FAQ)
Q1: Can AGICO produce rotary kiln spare parts according to my drawing?
A: Yes. We offer custom manufacturing based on your drawings or samples. We can adjust size, material, and design to fit your kiln.
Q2: What materials do you use for rotary kiln spare parts?
A: We use high-strength cast steel grades including ZG230-450, ZG270-500, ZG310-570, ZG35CrMo, and ZG42CrMo. For shafts, we also offer forged 42CrMo and 34CrNiMo6.
Q3: What quality control measures do you apply?
A: AGICO applies strict quality control at every stage — raw material inspection, in-process checks, and final testing before delivery. Every part undergoes non-destructive testing (UT, MT, PT).
Q4: Do you supply spare parts for rotary kilns from other brands?
A: Yes. AGICO produces replacement parts compatible with most rotary kiln brands. Our parts are manufactured to match or exceed OEM quality and fit.
Q5: What is the typical lead time for rotary kiln spare parts?
A: Lead time depends on the part type, size, and specifications. Typically 30–90 days. Contact us for a specific quote.
Q6: How can I get a price for rotary kiln spare parts?
A: Please contact us by email, online form, or phone. We will reply within 24 hours with a detailed quote.
