Head Nut ONA-442.7105-001 Suitable for Sandvik CH440 Cone Crusher Part

Product Overview
The head nut, also referred to as the mantle nut or main shaft nut, is a critical locking component positioned at the top of the cone crusher main shaft. The ONA-442.7105-001 head nut is a precision‑engineered replacement part specifically designed for cone crushers suitable for Sandvik CH440, as well as the equivalent model H4800. This large threaded nut structure performs three essential functions: it secures the mechanical connection between the mantle and the main shaft, transmits crushing forces throughout the shaft system, and helps maintain the proper gap between the mantle and the concave. Without a properly functioning head nut suitable for Sandvik CH440, the mantle can shift or loosen during crushing operations, leading to uneven liner wear, reduced crushing efficiency, and potential damage to the main shaft and other critical components.

The ONA-442.7105-001 head nut is manufactured from high‑strength alloy steel with surface hardening treatment, ensuring exceptional durability under the extreme forces generated during secondary and tertiary crushing on cone crushers suitable for Sandvik CH440. The part is commonly supplied with a burning ring (torch ring) to facilitate safe removal during mantle replacement. Cone crushers suitable for Sandvik CH440 offer a maximum feed size of 215 mm and are driven by a 250 kW power unit, making them suitable for high‑capacity secondary applications as well as high‑reduction tertiary or pebble‑crushing applications. Every ONA head nut is 100% dimensionally inspected before shipment to guarantee a perfect fit and reliable performance on your crusher, suitable for Sandvik CH440.

Product Advantages

Superior Locking Force

The ONA-442.7105-001 head nut delivers immense clamping force that securely locks the mantle onto the main shaft. This ensures the mantle remains firmly in position throughout the crushing cycle, eliminating axial movement that could compromise product size consistency on crushers suitable for Sandvik CH440. The robust locking action also prevents the mantle from spinning independently, which is a common cause of accelerated liner wear and reduced crusher efficiency.

High-Strength Alloy Steel Construction

Manufactured from premium alloy steel with surface hardening, the head nut is engineered to withstand over 2000 kN of crushing force. This material choice provides superior resistance to thread wear, fatigue cracking, and deformation under extreme operational loads. The durable construction significantly extends the service life of the component, reducing the frequency of replacement and lowering overall maintenance costs for your cone crusher suitable for Sandvik CH440.

Left-Hand Thread Design

The head nut features a left‑hand thread configuration, which serves as an anti‑loosening measure during crusher operation. As the crusher rotates and the eccentric assembly drives the main shaft, the left-hand thread design prevents the nut from backing off, maintaining consistent clamping pressure over extended periods. This engineering feature is critical for ensuring long‑term reliability in high‑vibration environments, particularly on crushers suitable for Sandvik CH440.

Versatile Compatibility

The ONA-442.7105-001 head nut is compatible not only with crushers suitable for Sandvik CH440, but also with H4800 models. This cross-model compatibility simplifies inventory management for operators who maintain multiple crusher models. ONA also offers head nuts for other CH/CS series crushers and is suitable for the Metso GP series, providing a comprehensive solution for your spare parts needs.

FAQs

Q1: Is the ONA-442.7105-001 head nut a direct replacement for the original part on cone crushers suitable for Sandvik CH440?

Yes. The ONA-442.7105-001 head nut is manufactured to OEM specifications, making it a direct‑fit replacement for cone crushers suitable for Sandvik CH440, as well as H4800 models. It requires no modifications during installation and includes the burning ring for safe mantle removal. Please confirm your crusher model and original part number before ordering to ensure correct fitment.

Q2: How often should the head nut be inspected or replaced on cone crushers suitable for Sandvik CH440?

The head nut should be inspected during every mantle change and during routine maintenance intervals on your crusher suitable for Sandvik CH440. Common signs of wear include thread damage, deformation of drive slots, and fatigue cracks. ONA recommends replacing the head nut if thread clearance exceeds 0.5 mm or if any visible damage is detected. Keeping a spare head nut in stock helps minimize downtime during scheduled or emergency maintenance.

Q3: Does ONA offer head nuts for other cone crusher models?

Yes. ONA manufactures head nuts for a wide range of cone crushers, including CH420, CH430, CH440, CH660, CH870, CH880, CH890, CH895, CS420, CS430, CS440, and CS660. For cone crushers suitable for Sandvik CH440, the ONA-442.7105-001 is the recommended replacement. 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.