CS420 CH420 Cone Crusher Parts Main Shaft Sleeve ONA-442.6140-01

Product Overview

The main shaft sleeve is a critical protective component in cone crushers, positioned between the main shaft and the eccentric assembly. It serves as a vertical bearing component that supports the main shaft movement and forces. When the main shaft rotates within the eccentric assembly, the sleeve absorbs radial loads, reduces friction between moving parts, and protects the expensive main shaft from direct wear and scoring. Without a properly functioning main shaft sleeve, the main shaft would be exposed to metal-to-metal contact, leading to premature failure of the entire shaft assembly and costly downtime. ONA offers the ONA-442.6140-01 main shaft sleeve as a precision-engineered replacement component designed to meet the exacting demands of modern crushing operations.

The ONA-442.6140-01 main shaft sleeve is specifically engineered for cone crushers suitable for Sandvik CH420/CS420, as well as the equivalent older models H2800 and S2800. In the Sandvik naming convention, CH420 is the current designation for what was previously known as H2800 (Hydrocone series), while CS420 corresponds to the older S2800 (Superior series). This sleeve is manufactured from high-quality bronze alloy with excellent self-lubricating properties, which helps prevent the machine from locking or being damaged when the lubricating oil supply is interrupted. The bronze material provides superior wear resistance, high compressive strength, and natural lubricity, making it ideal for heavy-load sliding applications between the main shaft and eccentric assembly. Every ONA main shaft sleeve is precision-machined to OEM specifications, ensuring a perfect fit and reliable performance. The following is a list of part numbers for the main shaft sleeve suitable for Sandvik cone crushers for your reference:

Product Advantages

Precision Engineered for OEM Compatibility

The ONA-442.6140-01 main shaft sleeve is manufactured to strict OEM tolerances, ensuring seamless interchangeability with original components. Each sleeve undergoes rigorous dimensional inspection to guarantee a perfect fit within the eccentric assembly, eliminating the need for modifications during installation.

Premium Bronze Alloy Construction

Made from high-quality bronze alloy, this sleeve offers excellent anti-friction properties, high compressive strength, and natural lubricity. The bronze material effectively reduces mating surface wear on the main shaft, dissipates frictional heat efficiently, and resists galling or seizure under high pressure. Each casting is precision-machined to optimise hardness and ductility, ensuring reliable performance in demanding crushing environments.

Extended Component Life

By serving as a sacrificial wear component, the main shaft sleeve absorbs the majority of the friction and wear that would otherwise damage the main shaft. This protective function significantly extends the service life of the main shaft and bearings, reducing overall maintenance costs.

Reliable Performance Under Extreme Conditions

The bronze sleeve maintains its structural integrity under high pressure, temperature variations, and continuous heavy loads. Its self-lubricating properties provide an additional layer of protection during momentary lubrication interruptions.

Cost-Effective Maintenance Solution

The brand innovated the spindle sleeve design, requiring replacement in less than 15 minutes. ONA adopted this user-friendly design philosophy, minimising downtime during maintenance. Replacing a worn main shaft sleeve is far more economical than repairing or replacing a damaged main shaft. The ONA-442.6140-01 offers exceptional value without compromising on quality or reliability, helping operators reduce long-term maintenance expenses.

Applications

Secondary Crushing in Mining Operations

The cone crusher suitable for Sandvik CH420 is widely used in secondary crushing applications in mines processing ores such as iron, copper, and gold. In these demanding environments, the main shaft sleeve ensures reliable performance under continuous heavy loads, protecting the main shaft from premature wear and minimising unplanned downtime.


Aggregate Production

In quarrying and aggregate plants, cone crushers suitable for Sandvik CH420 and CS420 are essential for producing high-quality crushed stone products. The main shaft sleeve maintains consistent crushing performance by ensuring smooth main shaft rotation within the eccentric assembly, contributing to uniform product size and grading.

Tertiary and Quaternary Crushing

The CH420 and CS420 cone crushers are also excellent choices for tertiary and quaternary crushing stages. In these applications where feed size is smaller but product quality requirements are higher, the main shaft sleeve plays a critical role in maintaining the precision and stability of the crushing process.

Mobile and Portable Crushing Plants

The CH420 cone crusher is frequently integrated into mobile crushing units such as the UD211, which combines a CJ409 jaw crusher with a CH420 cone crusher on a single trailer frame. In mobile applications where equipment is frequently relocated, the durability and reliability of the main shaft sleeve are particularly important for maintaining uptime and reducing maintenance requirements.

FAQs

Q1: Is the ONA-442.6140-01 main shaft sleeve compatible with both CH420 and CS420 cone crushers?

Yes, the ONA-442.6140-01 main shaft sleeve is designed for cone crushers suitable for Sandvik CH420, as well as the equivalent models H2800 and S2800. The sleeve is also compatible with CS420 cone crushers. Please confirm your crusher model and original part number before ordering to ensure correct fitment.

Q2: How often should the main shaft sleeve be inspected or replaced?

The replacement interval depends on operating conditions such as material hardness, feed size, and total running hours. As a bronze wear component, the main shaft sleeve should be inspected during routine maintenance. Signs of excessive wear, scoring, or reduced lubrication effectiveness indicate the need for replacement. The brand's innovative main shaft sleeve design allows for quick replacement in less than 15 minutes, minimising downtime. ONA recommends keeping a spare sleeve in stock to avoid unplanned production interruptions.

Q3: Does ONA offer main shaft sleeves for other Sandvik cone crusher models?

Yes, ONA manufactures main shaft sleeves for a wide range of cone crushers suitable for Sandvik models, including CH430, CH440, CH660, CS430, CS440, CS660, and other CH/CS series crushers. For models not listed or for custom orders based on your drawings, please contact ONA directly with your part number or equipment details for a quotation.