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Feiya Machinery serves as a Tier 2 manufacturing partner to the global automotive industry, providing high-precision aluminum die casting solutions that drive vehicle efficiency. As OEMs accelerate the shift toward vehicle lightweighting and electrification, we support your supply chain by converting heavy steel components into high-strength, lightweight aluminum automotive castings. We deliver large-volume production capabilities for powertrain, chassis, and new energy vehicle (EV)systems.
Our facility handles the rigorous demands of automotive standards, producing critical components such as engine blocks, transmission housings, suspension control arms, and battery pack housings. Utilizing advanced High-Pressure Die Casting (HPDC) machines (ranging from 400T to 2500T), Feiya ensures exceptional structural integrity and dimensional stability. From raw tooling design to final CNC precision machining, we provide a turnkey manufacturing solution that meets the strict defect-free requirements of the modern automotive assembly line.
Home > Automotive Castings
In the race for better fuel economy and extended EV range, every gram counts. Feiya provides specialized auto diecasting services that help OEMs and Tier 1 suppliers solve complex weight and structural challenges. Our manufacturing process is optimized for the high-volume, zero-defect requirements of the automotive industry.
Feiya specializes in the niche manufacturing of Hydraulic Release Bearings (also known as Concentric Slave Cylinders or CSC). While many suppliers offer generic parts, we provide tailored engineering services for castings automotive projects related to clutch actuation systems. We partner with clutch kit brands and transmission remanufacturers to develop high-performance aluminum housings that outperform standard plastic or cast-iron alternatives. Our engineering team focuses on optimizing the hydraulic pressure integrity and thermal stability of the bearing assembly.
Customization Capabilities Table:
| Customization Service | Feiya OEM Technical Solutions |
| Material Upgrade | Plastic-to-Aluminum:Many OEM slave cylinders are made of plastic, which can crack under high heat or pressure. We reverse-engineer these failures and create durable Aluminum Die Cast housings. This "Heavy-Duty" upgrade is highly sought after in the racing and commercial vehicle aftermarket. |
| Bore Precision | Leak-Free Surface:The internal bore of the release bearing housing acts as the hydraulic cylinder. We customize the honing process to achieve a mirror finish (Ra 0.4 or better), ensuring the internal rubber seals slide smoothly without leaking fluid, even after thousands of clutch cycles. |
| Mounting Adaptation | Flange Customization:Different transmission bell housings require different mounting patterns. We can modify the die-casting mold to change the bolt hole locations or flange shape, allowing a single core bearing design to fit multiple vehicle models by simply changing the outer casting geometry. |
| High-Temp Resilience | Seal & Housing Match:Hydraulic fluid gets hot. We analyze the thermal expansion rates of our aluminum alloy to ensure it matches the clearance requirements of the piston and seals. This prevents the "sticky pedal" feel caused by housing deformation in extreme stop-and-go traffic. |
Manufacturing a Hydraulic Release Bearing (CSC) is not just about shaping metal; it is about creating a pressure vessel that must survive millions of clutch cycles. Feiya applies a specialized manufacturing protocol for our die casting automotive projects, focusing on zero porosity and microscopic surface perfection.
High-Integrity Die Casting (ADC12 Alloy)
CNC Precision Machining
Critical Bore Honing (The Anti-Leak Step)
100% Pneumatic Pressure Testing
Feiya is a seasoned OEM manufacturer with 17 years of expertise in aluminum die casting. While renowned for our multi-platform motorcycle cylinder heads, our capabilities extend to automotive structural parts and precision fuel dispenser components. We provide complete end-to-end support—from mold development and high/low-pressure die casting to complex CNC machining and rigorous testing—delivering ready-to-assemble solutions for diverse industries.
Operating within a 17,000+ m² facility, Feiya integrates the complete aluminum manufacturing cycle—from in-house mold design and die casting (HPDC & LPDC) to precision CNC machining. Equipped with over 30 advanced casting units and 125+ CNC centers, we maintain an annual capacity exceeding 5,000 tons. This vertical integration allows us to strictly control production timelines and guarantee stable, scalable supply for your critical OEM projects.
Quality is the core of our operations. Feiya is ISO 9001 certified and recognized as a National High-Tech Enterprise and a Technology-Based SME in Zhejiang. We adhere to rigorous quality management systems to monitor every process, from raw material inspection to final tolerance checks. These credentials reflect our commitment to technical innovation and prove our reliability as a trusted partner for global automotive and industrial clients.
Durability and heat resistance. Many original plastic slave cylinders fail due to thermal fatigue, causing them to crack and leak after years of heat cycles. Feiya manufactures aluminum CSC housings using high-grade ADC12 alloy. These metal car castings are immune to cracking and offer superior heat dissipation, making them the preferred "Heavy-Duty" upgrade for the aftermarket replacement parts industry.
Leakage is usually caused by a rough internal bore damaging the rubber seals. Unlike basic sand casting, our precision die casting process creates a dense structure. Most importantly, we perform a specialized cylinder honing operation on every unit. This creates a mirror-smooth finish (Ra 0.4) that ensures the hydraulic seal remains tight, preventing clutch fluid leaks even under high system pressure.
Yes. High-performance racing clutches require higher clamp loads, which increase hydraulic pressure. Standard plastic bodies often burst under this stress. Our aluminum concentric slave cylinder bodies are engineered with reinforced wall thickness and structural ribbing. These robust car castings can withstand the extreme pressure spikes of a performance clutch kit, ensuring reliable shifting on the track.
Absolutely. We offer flexible tooling solutions. By using interchangeable mold inserts, we can modify the mounting flange and bolt patterns of the car castings. This allows us to produce compatible housings for various transmission bell housing designs (e.g., Ford, VW, or GM) using the same core cylinder tooling, reducing your mold development costs.
We have a zero-defect policy for hydraulic components. Every single aluminum housing undergoes pneumatic pressure testing before leaving our factory. We check for micro-porosity and seal defects to guarantee hydraulic integrity. This ensures that when your customer installs the bearing, they won't experience a "spongy pedal" or system failure.
In a clutch system, the slave cylinder sits inside the bell housing, exposed to extreme engine heat.
·The Problem:OEM plastic cylinders have a different coefficient of thermal expansion than the aluminum transmission case. This mismatch can cause the plastic to warp or crack under heat stress.
·Our Solution:Feiya’s automotive casting manufacturing process uses ADC12 aluminum. This material shares similar thermal properties with the transmission casing, ensuring the bearing maintains its dimensional stability and concentricity with the input shaft, even at operating temperatures above 120°C.
The interaction between the internal rubber seal and the cylinder wall is defined by tribology(the science of friction and wear).
·The Science:A surface that is too smooth can cause "stiction" (stick-slip), while one that is rough destroys the seal.
·The Honing Art:We employ a specialized plateau honing technique. This creates a specific cross-hatch pattern in the bore. These microscopic valleys retain a thin film of brake fluid(used as hydraulic medium) for lubrication, while the flat plateaus support the piston seal. This balance prevents fluid leakage and ensures a smooth, linear pedal feel.
When a driver presses the clutch pedal, they expect instant engagement.
·Plastic Weakness:Plastic housings can suffer from "ballooning" (expanding outward) under high hydraulic pressure, leading to a loss of volumetric efficiency. This results in a "mushy" pedal feel.
·Aluminum Stiffness:Our die-cast aluminum housings possess a much higher modulus of elasticity(stiffness) than plastic. They resist expansion under pressure, ensuring that 100% of the hydraulic force is directed towards the release bearing, providing crisp and responsive clutch actuation.
Hydraulic clutch systems typically use DOT 3 or DOT 4 brake fluid, which are glycol-based and corrosive. ·Corrosion Resistance:Feiya’s aluminum automotive castings undergo strict passivation or anodizing treatments. This ensures the metal is chemically inert to glycol fluids. We also test our EPDM rubber seals for compatibility to prevent swelling or degradation, ensuring the entire concentric slave cylinder (CSC) assembly remains leak-free for the vehicle's lifespan.