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Help CenterCarbon Steel Round Bar 6m Length +/-0.1mm Tolerance for Shaft Manufacturing
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Welcome to Hemaokang Steel (Shandong) Co., Ltd. – your trusted partner for high-quality carbon steel round bars. Our 6m length carbon steel round bar with +/-0.1mm tolerance is specifically engineered for shaft manufacturing applications. With an annual export value exceeding US$50 million and a dedicated team of 51–100 professionals, we ensure every bar meets the strictest dimensional precision and material integrity. Sourced from our factory in Liaocheng, Shandong, China, this product combines cost-effectiveness with reliability, making it the preferred choice for global shaft producers.
Our carbon steel round bar is manufactured under strict ISO9001 quality management system, guaranteeing consistent performance. The tight tolerance of +/-0.1mm over 6m length reduces secondary machining, saving time and material waste. Whether you need a standard diameter or a custom size, we offer flexible solutions to match your production requirements.
Key Features & Technical Specifications
- Material Options: AISI 1045, AISI 4140, AISI 8620, or custom grades – medium carbon content for excellent strength and wear resistance.
- Dimensional Precision: +/-0.1mm tolerance across the full 6m length, verified by laser measurement equipment.
- Surface Finish: Black (as-rolled), Bright (cold drawn), or Turned & Polished – choose based on your machining needs.
- Straightness: ≤ 0.5mm per meter, ensuring minimal vibration during shaft rotation.
- Mechanical Properties: Tensile strength 570–700 MPa (AISI 1045), yield strength ≥ 310 MPa, hardness 170–210 HB.
- Customization: Diameter from 20mm to 300mm, length up to 12m, and end chamfering available upon request.
- Packaging: Steel bundles with waterproof wrapping, or wooden crates for export protection.
| Parameter | Value |
|---|---|
| Length | 6m (other lengths on request) |
| Diameter Tolerance | +/-0.1mm |
| Length Tolerance | +/-5mm |
| Straightness | ≤ 0.5mm/m |
| Surface Roughness (if turned) | Ra ≤ 1.6μm |
| Standard | ASTM A29 / AISI / SAE |
| Certification | ISO9001:2015 |
Benefits for Shaft Manufacturing
- Reduced Machining Time: Tight tolerance minimizes material removal, cutting production costs.
- Consistent Quality: Each bar undergoes ultrasonic testing and hardness checks to ensure uniformity.
- Versatile Applications: Ideal for motor shafts, pump shafts, transmission shafts, and hydraulic cylinders.
- Global Supply Chain: We export to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East.
- Reliable Lead Times: Stock of common diameters (50mm, 80mm, 100mm) ready for immediate shipment.
Frequently Asked Questions (FAQ)
-
Q: What steel grades are available for this round bar?
A: We offer AISI 1045, 4140, 8620, and other carbon/alloy grades. Custom chemistry is also possible with minimum order quantity. -
Q: Can I get a sample before bulk order?
A: Yes, sample orders are welcome. We can provide a 1m or 2m piece for testing. Sample cost is negotiable and refundable for bulk orders. -
Q: How is the straightness guaranteed for long shafts?
A: Our bars are straightened after rolling/cold drawing. Straightness is controlled to ≤0.5mm/m, verified by a straightness gauge. -
Q: What is the minimum order quantity?
A: For standard diameters, MOQ is 5 tons. For custom sizes, MOQ is 10 tons. We can also consolidate smaller orders for LCL shipping. -
Q: Do you provide cutting or machining services?
A: Yes, we offer cutting to exact length, end chamfering, drilling, and threading. Please specify your requirements. -
Q: How do you ensure the product meets the +/-0.1mm tolerance?
A: We use digital micrometers and laser measurement systems during production. Each bar is inspected before packing. -
Q: What is the delivery time for a 20-ton container?
A: Typically 15–20 working days after order confirmation. Expedited shipping is available upon request. -
Q: Do you export to my country? What about customs documentation?
A: We export to all major markets worldwide. We provide full export documentation including certificate of origin, material test report, and packing list.
Why Choose Hemaokang Steel?
With ISO9001 certification and an annual export value of US$50–100 million, our company has established a reputation for reliable quality and punctual delivery. Our 51–100 experienced employees work in a modern facility in Liaocheng, Shandong, ensuring every batch of carbon steel round bar is produced with advanced machinery and strict quality control. We serve customers across North America, South America, Europe, Asia, Africa, and Oceania – a testament to our global competitiveness.
Contact us today for a quotation or technical consultation. Let Hemaokang Steel be your long-term partner for precision shaft manufacturing materials.
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