Maintain the structural integrity of your 7-ton powerhouse with the Merit Premium Tie Rod, specifically engineered for the Epiroc / Atlas Copco HB 7000. The tie rods (or through bolts) are the “backbone” of the hydraulic breaker, holding the back head, cylinder, and front head together under immense tension. Given the extreme impact energy of the HB 7000, these bolts are subjected to massive vibration and stretch. Merit’s 3363 0856 25 replacement ensures your breaker stays unified and leak-free during the most punishing demolition tasks.
Product Specifications
| Feature | Details |
|---|---|
| Product Name | Tie Rod / Through Bolt / Шпилька стяжная |
| Part Number | 3363 0856 25 / 3363085625 |
| Compatible Model | Epiroc / Atlas Copco HB 7000 |
| Material | High-Tensile 42CrMo Alloy Steel |
| Processing | Cold-Rolled Threads & Precision Heat Treatment |
Export to Sheets
Why Choose the Merit Tie Rod for the HB 7000?
The HB 7000 is one of the world’s largest breakers. A failure of a single tie rod can lead to a warped cylinder or a cracked housing. Merit tie rods are built for safety and endurance:
1. Fatigue-Resistant Forging
Our tie rods are manufactured from high-nickel alloy steel that has been optimized for “fatigue strength.” This allows the bolt to absorb the millions of micro-shocks produced during a shift without developing the internal fractures that cause standard bolts to snap.
2. Cold-Rolled Threads
Unlike cheap aftermarket bolts with cut threads, Merit 3363 0856 25 rods feature cold-rolled threads. This process compresses the steel grain rather than cutting it, making the threads significantly stronger and more resistant to “stripping” or “shearing” under the high torque requirements of the HB 7000.
3. Precision Tensioning
The HB 7000 requires exact torque specifications to maintain a hydraulic seal between its main components. Merit tie rods are machined to strict tolerances, ensuring that when you apply the factory-recommended torque, the tension is distributed evenly across the entire breaker body.
Maintenance Tip: The Importance of Tie Rod Torque
- Check Regularly: Tie rods should be inspected for tightness every 50 operating hours. A loose tie rod will allow the hammer components to “breathe,” leading to immediate seal failure and oil leaks.
- Replace in Pairs: If one tie rod snaps, the remaining three have been subjected to extreme uneven stress. It is industry best practice to replace tie rods in opposite pairs (or a full set of four) to ensure even tension.
- Use a Torque Multiplier: Always follow the Epiroc factory torque settings and use a torque multiplier to ensure the 3363 0856 25 is properly stretched. An under-tightened bolt will fail just as quickly as an over-tightened one.
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