Russian Energy Equipment Supplier × Honscn Precision CNC-Machined Heavy-Duty Brass Hydraulic Spools for Extreme Cold Environments
Client & Project Overview
Our customer is a large energy equipment supplier based in Yekaterinburg, Russia, serving drilling platforms and hydraulic systems for Siberian oil and gas fields.
In recent years, shifts in the regional supply chain forced the customer to seek alternatives to high-cost European components—without compromising on quality, reliability, or response time. They were looking for a Chinese manufacturing partner capable of delivering European-level precision, while also supporting fast engineering communication and export logistics.
This project marked the beginning of a strategic supplier transition.
Product Overview: Heavy-Duty Brass Hydraulic Distributor Spool
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Product Type: Hydraulic distributor spool (control valve core)
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Material: High-strength Hpb59-1 brass
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Application: Hydraulic power systems for drilling platforms
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Operating Conditions: -40°C to 80°C extreme temperature range
The component is responsible for directing high-pressure oil flow inside the hydraulic system. Any dimensional deviation or internal contamination could result in leakage, system failure, or complete equipment shutdown.
Key Technical Challenges
1. Material Stability in Extreme Cold Environments
Hydraulic components used in Siberian oilfields must remain mechanically stable under extreme cold.
Challenge:
Standard brass materials can become brittle at very low temperatures, increasing the risk of micro-cracks during operation.
Our Solution:
We strengthened material control at the earliest stage by:
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Performing spectral analysis on incoming raw material to strictly limit impurity content
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Applying secondary annealing after machining to eliminate residual stress
This ensured long-term structural stability and resistance to cold-induced cracking.
2. Cylindricity Control Across Multiple Stepped Diameters
The spool design featured five precision stepped outer diameters, each critical to hydraulic sealing performance.
Challenge:
The drawing specified a cylindricity tolerance within 0.005 mm across all steps to achieve near-zero leakage.
Our Solution:
Instead of relying solely on CNC turning, we:
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Introduced precision external cylindrical grinding for final finishing
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Designed a custom carbide center support to prevent deflection caused by the part’s length-to-diameter ratio
Final inspection showed stable cylindricity at 0.003 mm, exceeding the customer’s requirement.
3. Removal of Metal Chips from Deep Blind Holes
The spool contained eight deep circumferential blind holes, which posed a serious contamination risk.
Challenge:
Brass chips tend to adhere to hole bottoms. If left behind, they can enter the hydraulic system and cause catastrophic failure.
Our Solution:
We implemented a multi-step cleaning strategy:
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High-pressure internal coolant drilling at 7 MPa to evacuate chips during machining
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An additional high-pressure water jet cleaning process
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Individual borescope inspections to confirm complete debris removal
This ensured absolute cleanliness before final assembly.
Manufacturing Process Summary
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Precision CNC turning for primary geometry
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Cylindrical grinding for sealing surfaces
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High-pressure internal coolant drilling
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Stress-relief annealing
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100% inspection of critical dimensions
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Internal cleanliness verification
Each step was tailored specifically for this component’s performance requirements.
Project Results & Customer Feedback
The finished parts were fully compatible with the customer’s existing systems and passed all performance tests under simulated field conditions.
Results:
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Excellent dimensional compatibility with European reference parts
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Stable performance during high-pressure testing in low-temperature environments
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Smooth surface finish exceeding customer expectations
The customer’s Chief Engineer commented:
“Your parts are not only dimensionally interchangeable, but the surface finish quality exceeded our expectations. The components performed very reliably during pressure testing in Siberia. We also appreciate your strong support with export logistics and customs clearance.”
Why Energy Equipment Manufacturers Choose Honscn
This project highlights our strengths in:
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Precision CNC machining for hydraulic components
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Advanced brass material processing
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Extreme-condition application support
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Engineering-driven problem solving
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Reliable international delivery coordination
We don’t simply replace parts—we help customers replace supply risks.
Conclusion
Hydraulic components used in extreme environments demand more than standard machining.
They require material expertise, process discipline, and uncompromising quality control.
At Honscn, we deliver CNC-machined hydraulic solutions built to perform where failure is not an option.
If you are sourcing high-precision brass hydraulic parts for energy or industrial systems, our engineering team is ready to support your next project.