-
-
-
-
WeChat
-
whatsapp
Products
car rocker arm
Rocker arms made of high quality cast iron for automobile engines. Made from high-strength cast iron grades QT450/QT500 with CNC-machined working surfaces. The foundry is ISO 9001 and IATF 16949 certified. High fatigue strength and wear resistance. Export worldwide from Qingdao, China.
Description
marker
Cast iron rocker arms for automobile engines | Ductile iron with high ductility | OEM/ODM casting and machining | Qingdao Zhaoyuqi Machinery
Product Description
Title: High-strength cast iron rocker arms for reliable engine valve control
Qingdao Zhaoyuqi Machinery manufactures precision cast iron rocker arms (also known as valve arms or pushrods) designed for durable and efficient performance in internal combustion engines. As a specialty foundry, we manufacture these critical components using advanced green clay casting and shell casting processes, resulting in superior structural integrity and dimensional accuracy.
Our rocker arms are made from quality ductile iron (QT450, QT500-7) or gray cast iron, which has excellent fatigue strength, wear resistance and damping ability to withstand high-frequency shock loads in the valve train. Each product is precision CNC machined on the bearing points and valve contact surfaces to ensure optimal geometry and smooth operation. We serve automotive manufacturers, aftermarket parts distributors and engine rebuilders in North America, Europe and South America with OEM components and replacement parts that meet strict industry standards for performance and durability.
Applications and industries
Our cast iron rocker arms are used in:
Passenger cars: gasoline and diesel engines of sedans, SUVs and light trucks that require reliable valve drive.
Commercial trucks and buses: Heavy duty diesel engines where durability under high loads and temperatures is critical.
Agricultural and construction equipment: off-road engines for tractors, excavators and generators operating in harsh conditions.
Marine Engines: Industrial and recreational fleet engines requiring corrosion-resistant and durable valvetrain components.
Aftermarket and repair: high-quality spare parts for engine overhauls and tuning, with fit accuracy at the level of original parts.
Generating sets and industrial engines: stationary power units requiring long-life components with minimal maintenance.
Customization and production process
From tooling to precision machined part
Design and engineering: we work according to your drawings or restore the geometry from samples. Our engineers optimize the rocker arm shape to reduce weight and distribute stress.
Tooling: CNC-machined models for green clay casting (large, complex parts) or shell casting (small, high-precision parts with a smoother surface).
Casting: Controlled melting and pouring of ductile iron with spheroidizing treatment to ensure high toughness. Strict temperature control prevents defects such as shrinkage or porosity.
Heat treatment: normalization or hardening and tempering to improve mechanical properties (hardness, tensile strength) and relieve internal stresses.
Precision Machining: CNC ground and milled bore, adjuster screw seat and valve pad for precise geometry and low friction.
Finishing surface treatment: shot blasting. If desired, phosphating or oil impregnation for anti-corrosion protection during storage and transportation.
Quality control: dimensional checking, hardness testing and non-destructive testing (NDT).
Certification and quality assurance
ISO 9001:2015 and IATF 16949 certified processes: meeting automotive quality management system standards for sustainable production.
Material Traceability: Full batch certificates (MTC) are supplied for each batch, confirming chemical composition and mechanical properties (tensile strength, yield strength, elongation, hardness).
Dimensional Accuracy: Coordinate Measuring Machine (CMM) inspection ensures that critical tolerances on bores and mating surfaces are maintained as designed.
Non-Destructive Testing (NDT): Magnetic Particle Testing (MPI) or Penetrant Testing (PT) to detect surface cracks. Ultrasonic testing (UT) for internal integrity testing on request.
Fatigue and wear tests: prototypes undergo cyclic tests simulating engine operating conditions.
contact us
Related Popular Products
Bollard
Cast iron mooring bollards are essential mooring devices widely installed on quays, piers and jetties to reliably transfer mooring forces from moored vessels to the pier structure.
Washer
Our sand casting force washer is a heavy load transfer element specially designed for power line fittings, substation equipment and support structure connections.
Universal structural fastening
Engineering universal structural fastenings for severe operating conditions. ISO 9001 certified foundry offering custom casting (clay sand/shell molding) for the US, EU and South American markets. High strength, corrosion resistance, conforms to ASTM/DIN standards. Request a quote.
Nest eye
Our sand cast power socket eyelet is a high-strength multi-functional connection element specially designed for overhead power lines, substation insulator strings and distribution network overhead systems.
Clamp for guy wires
Our sand cast transmission guy guy clamp is a heavy duty anchorage specifically designed for overhead distribution lines, transmission towers and pole stabilization systems.
Valve handwheel
Durable industrial handwheels for gate valves, gate valves and butterfly valves. High-strength options in cast iron, steel and aluminum with precision machined hubs. ISO 9001 certified manufacturer offering OEM/ODM services. Global delivery from Qingdao, China.
Beam truss
Our sand cast beam truss is a high strength load-bearing structural element specifically designed for building slabs, suspended ceiling systems and industrial platforms.
Guardrail support bracket
High-strength cast iron and steel support brackets for highway and bridge guardrails and traffic barriers. Precision casting, hot-dip galvanized, ISO 9001 certified. Durable, corrosion-resistant, customized for global infrastructure projects. Export from Qingdao, China.
Cast iron nut
In the vast field of industrial fasteners, cast iron nuts are a basic but extremely important component. Due to their high cost-effectiveness and stable mechanical properties, they are widely used in various structural connections that require strength while being cost-sensitive.
Hanging clamp
Our sand cast overhead power line clamp is a high-performance precision load-bearing and fixing element designed for overhead power lines, distribution networks and substation overhead systems around the world.
Swivel mount for braces
High performance swivel fasteners for seismic bracing of pipes, ducts and cable trays. ISO 9001 certified foundry offering custom precision machined cast steel/iron components. Compliant with ASCE 7, IBC and EN standards. Export to the USA, EU and South America.
Spare parts for pumps
In industrial hydraulic systems, key components of pumps and valves are critical factors that determine the pressure load capacity, tightness and service life of the entire equipment.
Pipe roller
Certified manufacturer of industrial pipe rollers and support rollers. Highly loaded steel/cast iron rollers for oil and gas and construction pipelines. Custom OEM/ODM services, ASTM/DIN compliance. Export to the USA, EU and South America. Request a quote.
Pipe fittings
As key fittings designed for water and wastewater systems, municipal piping, building plumbing and other critical applications, our premium cast iron fittings are produced by sand casting from molten cast iron.
Parts for agricultural machinery
Agricultural machinery operates in harsh field conditions with high loads, where the reliability of spare parts directly determines uptime and harvesting efficiency.
Sidewalk bracket
Our sand-cast sidewalk power pole bracket is a heavy-duty load-bearing mounting mount specifically designed for urban sidewalk power poles, street lighting systems and public distribution facilities.