N98000228 HP4 HP5 HP6 Cone Crusher Spare Parts Counterweight Assembly

Technical Specifications: HP Series Counterweight Assembly

The Counterweight Assembly (N98000228) is essential for offsetting the centrifugal force of the eccentric assembly in HP Series crushers.
As specialized crusher part suppliers, we understand that a perfectly balanced counterweight is the only thing preventing your crusher from vibrating itself to destruction.
Our Spare parts are manufactured from high-grade Ductile Iron to provide both the mass required for inertia and the damping properties needed for smooth operation.

Core Advantages: Dynamic Balancing & Casting Integrity

For high-speed cone crushers like the HP4 and HP5, static balance is not enough.
Our manufacturing process ensures operational stability:

• Dynamic Balancing (G6.3): Every Counterweight Assembly is spun on a dynamic balancing machine.
  We drill precision correction holes or add weight to ensure it meets ISO 1940-1 Grade G6.3.
  This minimizes stress on the main frame bushings and prevents the “crusher wobble” that cracks foundations.
• Ductile Iron Construction: We strictly use ASTM A536 Ductile Iron (Nodular Iron).
  Unlike steel, Ductile Iron contains graphite nodules that absorb vibration energy, protecting the gear and pinion from high-frequency shock loads.
• Precision Oil Passages: The counterweight acts as an oil slinger.
  Our castings undergo endoscopic inspection to ensure the internal oil channels are free of casting sand.
  Blocked channels lead to instant bushing failure.

Performance Comparison: Why Balance Matters

Replacing a Counterweight is a major repair.
Ensure you choose high-quality Crusher spares to avoid repeating the job:

Field Diagnosis: Inspecting the Counterweight

The Counterweight itself rarely breaks, but it suffers from environmental damage.
Check these areas:

• Erosion from Falling Rock: Look at the “thick” side of the counterweight.
  If the Counterweight Guard (protection plate) has worn through, rocks will erode the iron casting itself.
  If the weight loss exceeds 5%, the dynamic balance is lost, and the assembly must be replaced.
• Bushing Bore Wear: Measure the ID where the Eccentric Bushing sits.
  If the bushing has spun, the bore will be oversized.
  Attempting to shim a loose bushing is dangerous; the counterweight should be replaced.
• Cracks near Oil Holes: Inspect the thin sections near the oil ports.
  Over-speeding the crusher can cause stress fractures in these areas.

Expert Tip: The Critical Guard

Protect your investment: The N98000228 Counterweight Assembly is expensive.
The Counterweight Guard (a replaceable steel liner that bolts onto it) is cheap.

Golden Rule: Never run the crusher with a worn-through guard.
Once the rock starts eating into the Counterweight casting, you are altering the balance of the machine.
Replacing the guard on time saves you the cost of the entire assembly.

Frequently Asked Questions (FAQ)

Q1: Does this assembly come with the Eccentric Bushing installed?
A1: Typically, no.
The Counterweight Assembly (N98000228) is the bare casting.
However, as comprehensive crusher part suppliers, we can pre-install the Eccentric Bushing and the Counterweight Guard in our factory for a “Drop-in Ready” solution.

Q2: Why is the Counterweight painted on the inside?
A2: It is not standard paint; it is an oil-resistant engine enamel (Glyptal).
This seals the casting surface to prevent any residual casting sand from leaching out into your lube oil system and scoring the bearings.

Q3: Can I repair a worn Counterweight by welding?
A3: No. Ductile Iron is very difficult to weld reliably.
Furthermore, adding weld metal changes the weight distribution, destroying the dynamic balance.
An unbalanced repaired part will destroy your Main Frame bushings in weeks.