Metso HP100 Countershaft Bushing | 7015604504 Bronze Part

Metso HP100 Countershaft Bushing: 7015604504 Bronze Replacement

The Countershaft Bushing (Part # 7015604504) supports the high-speed input shaft of the Metso HP100 cone crusher. It is a critical hydrodynamic bearing located inside the Countershaft Box. This component bears the radial load of the V-belt drive tension and the reaction force from the pinion gear. Operating at speeds exceeding 800 RPM, it demands a flawless oil film and precise alignment to prevent vibration and premature seal failure.

We manufacture this bushing using ASTM C93700 (SAE 64) High-Leaded Tin Bronze via Centrifugal Casting. This manufacturing process ensures a dense, porosity-free structure with uniform lead distribution, providing superior anti-friction properties compared to standard sand-cast bronze.

Technical Specifications

Performance Analysis: Why Centrifugal Casting?

[Engineer’s Note] The HP100 countershaft spins faster than larger crushers.

1. Porosity Free: Centrifugal casting forces impurities to the center (which is machined out). This eliminates the risk of oil seeping through casting pores, which causes oil pressure drops.

2. Wear Resistance: The refined grain structure of C93700 bronze extends service life by 25% compared to C93200 (SAE 660), especially under the heavy side-load of the drive belts.

Field Diagnosis: When to Replace

A worn countershaft bushing causes vibration and oil leaks. Inspect for:

1. Shaft Vibration
Place a vibration sensor on the Countershaft Box. If vibration exceeds 5 mm/s, the bushing clearance has opened up. This will eventually destroy the Pinion Gear alignment.

2. Oil Leakage at Pulley
If the bushing is worn, the shaft will run eccentric (off-center). This oval movement destroys the Oil Seal lips, causing oil to leak onto the drive pulley. Replacing the seal without replacing the bushing is a waste of time.

3. Bronze in Oil Filter
If you find fine, non-magnetic gold dust in the return oil filter, the countershaft bushing is likely “wiping” due to misalignment or belt overtension.

Installation Best Practices

1. Press Fit: This bushing is an interference fit into the Countershaft Box. Freeze the bushing in Dry Ice (-70°C) for 1 hour before installation. It should slide in easily. Do not hammer it.
2. Oil Groove Alignment: Ensure the oil inlet hole in the bushing aligns perfectly with the oil passage in the housing. Mark the housing before installation.
3. Clearance Check: After installation, measure the ID. If the interference fit compressed the bushing too much, it may need to be honed to restore the correct running clearance (0.15mm – 0.20mm).

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Cross-Brand Compatibility Disclaimer

Our aftermarket crusher spares are engineered to be fully interchangeable with OEM components. All manufacturer names, part numbers (e.g., 7015604504), and descriptions are used for reference purposes only. NEWREG supplies independently manufactured replacement parts and is not affiliated with the OEM.