Top Bearing Suit for Metso GP Cone Crusher

The Top Bearing is a precision‑engineered cast steel component designed suit for Metso GP series cone crushers. It serves as the upper support for the main shaft, absorbing heavy radial loads while allowing smooth rotation. Manufactured from high‑strength cast steel via precision casting, it guarantees reliable performance and extended service life. It is worth noting that this component has different names across brands: for crushers suit for Metso GP series, it is commonly called “Top Bearing” (installed in the upper frame); for crushers suit for Sandvik CH/CS series, the equivalent part is called “Spider Bushing” (installed in the spider/top shell). Although both serve the same function – supporting the upper end of the main shaft – they are not interchangeable between brands. Always specify your crusher brand and model when ordering.

ONA GP300S Top Bearing Placement
Eg: GP300S ONA-MM0228204

Function of the Top Bearing Suit for Metso GP Cone Crushers

1. Main Shaft Support: Supports the upper section of the main shaft and ensures smooth rotation during operation.

2. Friction Reduction: The internal oil/grease distribution grooves maintain a stable lubricating wedge even under shock loads, minimizing wear between the main shaft and the bearing.

3. Geometric Centering: Precision-machined to keep the main shaft perfectly vertical when stationary and ensure accurate alignment during operation.

4. Radial Load Absorption: Serves as the primary radial bearing at the top of the crusher, absorbing lateral vector forces generated during hard rock crushing applications.

Applications

The top bearing is essential for:

• Suit for Metso GP series cone crushers (GP100, GP200, GP300, GP500, GP220).
• Suit for Sandvik CH/CS series cone crushers (CH420, CH430, CH440, CH660, CH870, CS420, CS430, CS440, CS660).
• Secondary, tertiary, and quaternary crushing stages in mines and quarries.
• High‑tonnage plants where uptime and precision are critical.
• Processing hard and abrasive materials such as granite, basalt, and iron ore.

Replace together with Top Bearing (same wear cycle / direct contact)

• Dust Seal (Spider Seal): Prevents dust and debris from entering the bearing area, protecting the new top bearing from premature wear.
• Main Shaft Sleeve: Protects the main shaft surface that contacts the top bearing; replacing both together ensures proper fit and avoids accelerated wear.
• Upper Thrust Bearing Set: Absorbs axial crushing forces and is located at the lower end of the main shaft; inspect and replace when servicing the top bearing to maintain vertical stability.
• Eccentric Bushing: Enables the gyratory motion of the main shaft; inspect its wear pattern during top bearing replacement, as uneven wear affects crushing performance.

Additional Components (check separately, replace if needed)

• Main Shaft: Replace only if damaged.
• Upper Frame: Replace only if cracked.
• Gear Set (Gear & Pinion): For CSS adjustment; replace if tooth wear is observed.

Choosing genuine‑quality top bearings and replacing mating parts together minimizes downtime. For complete crusher maintenance, pair with high‑performance cone crusher wear parts to extend liner life and reduce costs.

Why Choose ONA Top Bearing & Factory Direct Advantage

Choosing genuine‑quality top bearings from ONA ensures smooth coordination between the bearing, main shaft, and lubrication system, reducing unexpected failures and prolonging crusher uptime. For complete crusher maintenance, pair with high‑performance cone crusher wear parts from ONA to further extend liner life and reduce total operating costs. ONA is your reliable partner for crusher parts. Our factory offers competitive prices and strict quality control on all crusher wear parts – contact us for bulk orders.