4-Piece Segmented Girth Gear for Ball Mill Transmission Assembly
As a specialized manufacturer of heavy industrial machinery components with over a decade of experience, Henan San Kuang Machinery Technology Co., Ltd. is proud to present our precision-engineered 4-Piece Segmented Girth Gear. This critical component is designed for the reliable and efficient transmission of power in large ball mills and rotary equipment. Our manufacturing expertise, honed since our establishment in 2014 within our expansive 10,000-30,000 square meter facility, ensures that each gear segment delivers exceptional durability, precise meshing, and long-term operational stability, directly contributing to reduced downtime and enhanced productivity for your grinding operations.
This segmented design is a strategic solution for large-diameter applications, offering significant advantages over traditional one-piece gears. The core value lies in its ease of transportation, simplified installation, and cost-effective maintenance. By dividing the gear into four manageable segments, we eliminate the logistical nightmares and excessive costs associated with moving and installing monolithic gears. Furthermore, in the event of localized wear or damage, only the affected segment needs replacement, drastically cutting repair time and expenses.
Key Features & Technical Advantages:
- Superior Material & Heat Treatment: Forged from high-grade alloy steels like 42CrMo, each segment undergoes controlled heat treatment processes such as carburizing and quenching. This achieves an optimal balance of a hardened, wear-resistant tooth surface and a tough, shock-absorbing core, ensuring resilience against the high cyclic loads of mill operation.
- Precision Manufacturing: Utilizing state-of-the-art CNC gear hobbing and finishing machines, we guarantee precise tooth profile (involute), accurate pitch, and consistent lead. This precision minimizes vibration, reduces noise, and ensures smooth power transfer, which extends the lifespan of both the gear and the mating pinion.
- Robust Segmented Joint Design: The interfaces between segments are machined to micron-level tolerances. High-tensile alloy steel bolts and precision-machined locating dowels are used to create a rigid, seamless connection that performs as a single unit under load, preventing misalignment and ensuring even load distribution.
- Optimized Tooth Geometry: The tooth profile is engineered for maximum contact ratio and load-carrying capacity. Modifications like tip and root relief are often applied to prevent edge loading and reduce stress concentrations, further enhancing durability and meshing smoothness.
- Customization & Compatibility: We do not offer a one-size-fits-all product. Our gears are engineered to match your specific ball mill specifications, including root diameter, face width, number of teeth, module, and mounting hole pattern. This ensures a perfect fit and optimal performance for your existing or new equipment.
Technical Specifications & Parameters:
| Parameter | Typical Range / Specification |
| Number of Segments | 4 |
| Material Grade | Alloy Steel (42CrMo, ZG310-570, etc.) |
| Module (M) | 20 - 50 (Customizable) |
| Tooth Hardness (Surface) | HRC 55-60 (Carburized & Hardened) |
| Core Hardness | HRC 28-35 |
| Gear Accuracy Grade | ISO 1328 Class 8-9 (or per customer drawing) |
| Mounting | Bolt-on to mill shell flange |
Benefits for Your Operation:
- Reduced Total Cost of Ownership: Lower transportation costs, easier installation requiring less heavy lifting equipment, and segment-based repair capability lead to significant long-term savings.
- Enhanced Operational Reliability: Precision manufacturing and robust materials minimize the risk of catastrophic gear failure, ensuring consistent mill availability for your production targets.
- Improved Maintenance Efficiency: Downtime for gear-related repairs is slashed. Swapping a single segment is far quicker than dealing with an entire ring gear.
- Global Supply Chain Support: With annual exports valued between US$2.5 and $5 Million and shipment capabilities from major ports like Shanghai, Qingdao, and Tianjin, we reliably serve a global clientele across North America, Southeast Asia, Africa, Europe, and beyond.
When you choose Henan San Kuang, you are not just buying a gear; you are investing in a partnership backed by a robust quality management system (including ISO 9001), a dedicated team of 51-100 skilled professionals, and a proven track record of supplying critical components to the mining and cement industries worldwide. Our commitment to quality, precision, and customer-specific solutions makes our 4-Piece Segmented Girth Gear a dependable choice for maximizing the uptime and efficiency of your ball mill. Contact us today with your mill specifications to receive a detailed quotation and technical support.
Frequently Asked Questions (FAQ)
Q1: Why choose a 4-piece segmented design over a one-piece girth gear?
A1: The segmented design primarily solves logistical and maintenance challenges. It dramatically reduces transportation costs and complexity, allows for installation in space-constrained areas without massive cranes, and enables the replacement of only worn sections, saving time and money on repairs.
Q2: How do you ensure the four segments align perfectly to function as one solid gear?
A2: Precision is key. The mating faces of each segment are finish-machined to very tight tolerances. We use hardened and ground dowel pins for precise radial and circumferential location, along with high-strength fitted bolts that are torqued to a specific sequence and load, ensuring a rigid, seamless joint.
Q3: What information do you need to provide a quote for a custom girth gear?
A3: To provide an accurate quotation and manufacturing drawing, we typically require: Mill manufacturer and model, root diameter, face width, number of teeth, module (or diametral pitch), pressure angle, tooth profile details, material specification, hardness requirements, and drawings of the mounting flange on your mill shell.
Q4: What is the typical lead time for manufacturing a custom segmented girth gear?
A4: Lead time depends on the size, material, and complexity. For standard materials and sizes, production typically takes 8-12 weeks from order confirmation to readiness for shipment. This includes material procurement, forging/casting, rough machining, heat treatment, finish machining, and quality inspection.
Q5: How do you handle quality control during the manufacturing process?
A5: Our quality control is integrated at every stage. It includes material certification checks, in-process inspections during machining (dimensions, tooth profile via gear testers), post-heat-treatment hardness verification, and final assembly checks for bolt hole alignment and segment interface matching. We can provide inspection reports as requested.
Q6: Can you supply the mounting hardware (bolts, nuts, dowels) with the gear?
A6: Yes, we strongly recommend and can supply a complete mounting kit. This includes high-strength alloy steel bolts, nuts, washers, and precision dowel pins. Supplying matched hardware ensures proper fit, strength, and corrosion protection, and simplifies your installation process.
Q7: What are the recommended lubrication and maintenance practices for this gear?
A7: Proper lubrication is critical. We recommend a high-viscosity, extreme pressure (EP) gear oil suitable for slow-speed, high-load applications. Lubrication can be via a spray system directed at the mesh point or a dip system. Regular inspection for wear patterns, tooth pitting, and proper lubrication is essential for long life.
Q8: Do you offer on-site technical support for installation?
A8: While we provide detailed installation manuals and drawings, on-site technical supervision can be arranged for an additional fee. Our engineers can guide your team through the alignment, bolting, and final checking procedures to ensure optimal installation.
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