CNC Machined Polished 40Cr Alloy Steel Parts With HRC50 Hardness For Machine Tools

15+ Years of Experience On CNC Machining:

With 15+ years in custom CNC precision machining services, JINGXIN has honed its capabilities in producing 40Cr alloy steel components for machine tools: each part undergoes CNC machining for accuracy, receives a polished surface treatment, and is processed to achieve HRC50 hardness—key traits that make them reliable for long-term use in machine tool systems. Located in Dongguan City, China, our professional team adopts rational manufacturing processes and solutions, along with exquisite workmanship, to supply high-quality one-stop custom CNC precision machined parts—including these core 40Cr alloy steel parts for machine tools, as well as those made of stainless steel, aluminum, iron, etc.

We Focus on:

Custom non-standard CNC precision machining services & milling parts, with targeted expertise in 40Cr alloy steel components for machine tools (such as machine tool spindle connectors, guideway blocks, and tool clamping parts). These parts, thanks to their CNC-machined precision, polished surface, and HRC50 hardness, excel in withstanding the high-load, high-friction working environments of machine tools while maintaining stable dimensional accuracy. Our product scope also covers fittings, valves, hydraulic components, electric motor parts, transmission and pump parts, sprocket wheels, wear parts on packing machines, and electronic and medicinal pieces.

Our Advantage:

1.Advanced Equipment: We operate a world-class facility equipped with a variety of precision CNC machines (Brother, HAAS, Mazak), vertical milling centers, and precision milling and turning lathes (including 3-axis, 4-axis, and 5-axis models). Our 4-axis and 5-axis machines are particularly suited for machining 40Cr alloy steel parts—their high rigidity minimizes vibration during cutting, which preserves the integrity of the HRC50 hardness (avoiding local softening) and ensures the polished surface stays smooth (with surface roughness typically reaching Ra ≤ 0.8μm, meeting machine tool’s low-friction requirements).

2.Complete Machining Capability In-House: We adhere to the ISO 2768-F/M machining standard for tolerances, producing parts in a wide range of sizes and complexities—from small polished 40Cr tool holders to large machine tool guideway components. Our maximum CNC milling capability refers to the list below. For 40Cr alloy steel parts, we also integrate post-processing steps like precision grinding before polishing, ensuring the HRC50 hardness and polished finish coexist without compromising dimensional precision.

3.Raw Material: We are 100% certain that all materials comply with RoHS standards and meet your design specifications. For 40Cr alloy steel, we select high-purity billets and apply a strict quenching-tempering heat treatment process to ensure each part stably achieves HRC50 hardness (with a hardness deviation of ≤ ±1 HRC). Material certificates, SGS reports, and HRC50 hardness test reports (for 40Cr parts) are available upon request for reference. Our material range also includes steel, aluminum, stainless steel, titanium, and engineering plastics (e.g., PEEK, PC, POM); more details refer to the list below.

4.Order Quantity: We accept orders starting from 1 unit, supporting both short-run precision CNC milling & turning and large-volume production—whether you need a small batch of custom polished 40Cr spindle parts or mass-produced guideway blocks for machine tools.

5.Quick Turnaround: We provide quick quotes within hours and fast delivery in days, backed by a skilled and professional R&D team. Even for 40Cr parts requiring additional heat treatment (for HRC50 hardness) and polishing, we optimize the production workflow to avoid delays.

6.Our Customers: Our customers are from the EU and North America, many of whom are machine tool manufacturers. They trust our 40Cr alloy steel parts for their consistent HRC50 hardness, smooth polished surface, and reliable precision—all of which boost the performance and service life of their machine tools.

Quality Assurance:

What we do to ensure you receive high-quality parts from JINGXIN: We declare here that we will be responsible for our precision machined parts at all times.

1.100% inspection before shipping: For 40Cr alloy steel parts, we conduct specialized checks—including HRC50 hardness testing (using a portable Rockwell hardness tester) and polished surface inspection (to detect scratches or unevenness). An inspection report for each piece of precision CNC milling part (including machine tool-related 40Cr components) is available. We implement ISO quality control throughout the entire production process, from 40Cr material incoming inspection to final polishing.

2.We have served Volvo Auto Corp since 2016 as an approved precision CNC milling company in China (supplying high-precision auto parts), and we also have a solid track record of partnering with domestic and international machine tool brands—providing polished 40Cr alloy steel parts with HRC50 hardness, with no complaints so far.

3.In case any precision machined part (including 40Cr alloy steel parts) is outside tolerance or fails to meet your special specifications (e.g., HRC50 hardness deviation, unqualified polished surface), we will remake and deliver them as fast as we can, 100% free of charge.

4.Over the past years, JINGXIN CNC Milling Company has manufactured thousands of precision CNC machined components for our customers—including tens of thousands of polished 40Cr alloy steel parts for machine tools. The 99.9% satisfaction feedback (especially regarding the wear resistance of HRC50 parts and the smoothness of polished surfaces) drives us to supply more high-quality precision machined parts to meet customer requests.

JINGXIN was founded in 2015 to serve the growing market of Custom CNC machining parts for the Automotive industry, Car production line special equipment market, primarily for Industry, Power generation, Automotive equipment, Lightning, Appliances, Medical equipment and Tool sector. JINGXIN Offer its professional CNC manufacturing services (CNC machined parts) to top-rated international clients, primarily for export to the USA and EU countries. JINGXIN has been able to maintain, expand and diversify its prestigious international clients with its excellent quality of products. JINGXIN is located in Dongguan China. Which is named world-class manufacturing city. With a factory of over 2000 square meters.

we are trusted by most famous clients such as BMW(Germany), VOLVO (Sweden), NFL(USA), etc.

150+ skilled workers inside, especially 20+ experienced engineers, as well as well-trained international sales staff, they are combined into a team group one by one. All of your project’s details & questions can be quickly and professionally feedback.

JINGXIN offers three main manufacturing processes:

3/4/5 Axis CNC milling services   (CNC machining work range maximum 2000.00 with accuracy +/-0.001mm)

CNC turning services 

Customized manufacturing per design (sheet metal, welding, assembly.etc )

JINGXIN Advantage & Clients Benefits

• Increase your production levels with more competitive costs. By adopting advanced CNC machines, other equipment, and ISO 9001 quality control system, you control costs and turnaround times, and you can also afford some flexibility as opposed to outsourcing the work.
• Meet the needs of your industry. For that reason, our high-quality custom manufacturing services produce outcomes that apply to industrial standards.
• No need for more vendors or outsourcing. We are your one-stop-shops for CNC Rapid Prototyping, Vacuum Casting, CNC Machining services, Plastic injection molding and Tooling, Sheet Metal Fabrication etc.
• Short-run production or 10000+ production. Applications include parts for Auto parts, medical, industry.
• Typical tolerance range from +/- 0.01mm-0.05mm;
• The Fast lead time within 10-15 working days.