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Help CenterPrecision Machining and Custom Mechanical Processing for Steel Parts With ISO 2768-m Tolerance and 3-Jaw Chuck
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Welcome to Henan San Kuang Machinery Technology Co., Ltd. – a trusted manufacturer with over a decade of expertise in precision machining and custom mechanical processing. Our Precision Machining and Custom Mechanical Processing for Steel Parts with ISO 2768-m Tolerance and 3-Jaw Chuck service is designed to deliver high-accuracy, repeatable components for your most demanding applications. By leveraging our advanced CNC equipment, skilled engineering team, and strict quality control system, we ensure that every part meets the exact specifications you require, with tight tolerances and excellent surface finishes.
Our processing capabilities are built around the ISO 2768-m tolerance standard, which provides a reliable balance between precision and cost-effectiveness for general engineering applications. The use of a 3-jaw self-centering chuck guarantees concentricity and stability during machining, reducing setup time and improving overall efficiency. Whether you need simple turned parts or complex multi-axis milled components, our factory can handle it all.
Key Features & Technical Specifications
Material Expertise: We machine a wide range of steel materials, including carbon steel (e.g., 1045, 1215), alloy steel (4140, 4340), stainless steel (303, 304, 316), and tool steel (D2, A2).
Precision Tolerance: Standard tolerance per ISO 2768-m (medium) – achievable linear dimensions: ±0.1 mm to ±0.3 mm for basic sizes; our CNC machines can consistently hold tighter tolerances upon request.
3-Jaw Chuck Capability: Maximum clamping diameter up to 500 mm, ensuring secure holding for round or hexagonal workpieces.
Processing Methods: CNC turning, milling, drilling, tapping, boring, grinding, and custom thread cutting.
Surface Finishing: As-machined, anodizing, plating, black oxide, powder coating, or passivation – all available on request.
Quality Assurance: 100% inspection using CMM, micrometers, and go/no-go gauges; ISO 9001:2015 certified quality management system.
Typical Dimension & Tolerance Table
| Parameter | Standard Capability | Remarks |
|---|---|---|
| Max Turning Diameter | 500 mm | With 3-jaw chuck |
| Max Turning Length | 1000 mm | Between centers up to 1500 mm |
| Linear Tolerance (ISO 2768-m) | ±0.1 mm to ±0.3 mm | For basic sizes 6-30 mm: ±0.2 mm; 30-120 mm: ±0.3 mm |
| Surface Roughness (Ra) | 0.8 μm – 3.2 μm | Lower achievable with grinding |
Benefits for Your Business
Reduced Scrap & Rework: Our rigorous in-process inspection and ISO 2768-m tolerance control minimize dimensional errors, saving you time and material costs.
Faster Lead Times: The 3-jaw chuck enables quick workpiece changeover, reducing non-cutting time. We typically deliver orders within 10–25 working days.
Flexible Customization: From prototype to mass production, we adjust parameters to match your unique design, material, and surface finish requirements.
Consistent Quality: With a robust quality system certified to ISO 9001, you can trust every batch to meet the same high standards.
Global Logistics: We ship from major Chinese ports (Shanghai, Qingdao, Tianjin, Lianyungang) to any destination worldwide, with reliable packaging to prevent damage.
Trust & Reliability
Since 2014, Henan San Kuang Machinery Technology Co., Ltd. has grown into a specialized manufacturer with a 10,000–30,000 m² factory and a team of 51–100 experienced professionals. Our annual export value exceeds US$2.5 million, and we regularly serve clients in North America, Europe, Southeast Asia, Oceania, and the Middle East. We hold multiple certifications including ISO 9001, ISO 14001, ISO 16949, OHSAS 18001, and many more. These credentials reflect our commitment to quality, safety, and environmental responsibility.
When you choose our precision machining service, you gain a reliable partner who understands the importance of tolerance, material integrity, and delivery schedules. We invite you to contact us with your part drawings or specifications for a free quotation and technical review. Let us help you achieve the perfect fit for your steel components.
Frequently Asked Questions
Q1: What is the minimum order quantity (MOQ) for custom steel parts?
A: Our MOQ is typically 10 pieces for standard machining, but we welcome small prototype runs (1–5 pieces) at a higher unit price. Contact us for a specific quotation.
Q2: Can you machine stainless steel, and what tolerance can you hold?
A: Yes, we regularly machine stainless steel grades 303, 304, and 316. For stainless steel, we can hold ISO 2768-m tolerance as standard, and tighter tolerances (e.g., ±0.05 mm) are possible with additional process control.
Q3: Why should I choose ISO 2768-m tolerance over finer tolerances like ISO 2768-f?
A: ISO 2768-m offers a cost-effective balance for general mechanical applications where tight fits are not critical. It reduces machining time and tool wear, lowering your overall part cost. If your design requires tighter precision, we can adjust to ISO 2768-f or custom tolerances.
Q4: How do you ensure the concentricity of parts when using a 3-jaw chuck?
A: Our 3-jaw chucks are regularly maintained and calibrated. For critical concentricity requirements, we use a 4-jaw independent chuck or a collet system. We also perform runout checks on every part.
Q5: What surface finishes do you offer, and how do they affect cost?
A: We offer as-machined, anodized, black oxide, zinc plating, and powder coating. As-machined is the most economical. Additional finishing processes add time and cost, but we provide transparent pricing.
Q6: Can you provide a sample before mass production?
A: Absolutely. We can produce a first article (sample) for your approval. The sample cost is typically deducted from the final order if you proceed with production.
Q7: What is the typical lead time for a medium-sized order (500 pieces)?
A: For a typical order of 500 simple turned parts, lead time is about 15–20 working days from approval of the drawing. Complex parts may require 25–30 days.
Q8: Do you offer any warranty on your machining work?
A: Yes, we guarantee that all parts conform to the agreed specifications. If any defect due to our workmanship is found, we will replace or rework the parts at no extra cost, as per our standard warranty policy.
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