Henan Gnee New Material Co., Ltd. is one of the most reliable manufacturers and suppliers of precision ground aluminum rod in China. With abundant experience, we warmly welcome you to wholesale high quality precision ground aluminum rod in stock here from our factory. Good service and reasonable price are available.
Precision Ground Aluminum Rod
At GNEE, a Chinese supplier specializing in high-precision aluminum products, the manufacturing of 6061 precision ground aluminum rods follows a rigorous and standardized multi-stage process. Each procedure is carefully controlled to achieve excellent straightness, superior surface quality, and precise dimensional accuracy, meeting the requirements of precision machining and industrial applications.
High-Quality 6061 Aluminum Rod Billet Selection
The production process begins with homogenized aluminum billets made from premium 6061 aluminum rod materials. Every billet is carefully inspected to confirm internal soundness and structural uniformity, ensuring reliable performance and consistent quality throughout subsequent processing stages.
6061 T6/T651 Aluminum Rod Hot Extrusion and Heat Treatment
Selected billets are hot-extruded into aluminum bars under controlled conditions to form the required dimensions. The extruded bars then undergo solution heat treatment and artificial aging to reach T6 or T651 temper states, providing stable strength, hardness, and mechanical consistency across the entire aluminum rod.
Surface Peeling and Chamfering of 6061 Aluminum Bars
To improve surface integrity, extrusion-related defects are removed through peeling or rough turning operations. This process enhances surface uniformity and prepares the material for precision finishing. Chamfering is applied afterward to both ends of the rods, allowing smoother feeding during downstream processing.
Cold Drawing and Stress Relief for Precision 6061 Aluminum Rods
Cold drawing is carried out to further enhance dimensional precision and straightness. This step refines tolerance control while improving material density. Stress-relief annealing is then performed to eliminate internal residual stress, ensuring dimensional stability during precision grinding operations.
Centerless Grinding and Polishing of 6061 Precision Aluminum Rod
Multi-pass centerless grinding and polishing are used to achieve high-precision tolerances. Through this controlled process, GNEE produces aluminum rods with h8/h9 tolerance grades, excellent roundness, and a fine surface finish reaching Ra ≤ 0.2 µm, making them ideal for precision equipment and high-end machining applications.
Cleaning, Inspection, and Packaging of GNEE Aluminum Rod Products
In the final stage, finished aluminum rods undergo ultrasonic cleaning to remove contaminants and particles. Comprehensive inspections verify dimensional accuracy and surface quality. The products are then vacuum-packed and securely protected to ensure safe international transportation and reliable global delivery.
Lead Time: 5-7 days for in-stock alloys (e.g., 6061/7075); 15-20 days for custom extrusion and grinding.
Seaworthy Packaging: Rods are individually sleeved in protective plastic netting, interleaved with VCI anti-rust paper, and packed in ISPM-15 solid wooden cases to ensure zero impact damage during ocean transit.
Aluminum Precision Ground Bar Specifications
| Parameter | Specification |
|---|---|
| Available Alloys | 2024, 6061, 6082, 6262, 7075 (High-machinability grades) |
| Tempers | T3, T4, T6, T651, T6511, T7351 |
| Diameter Range | 4 mm – 300 mm (Imperial sizes: 1/8″ to 1.5″ available) |
| Tolerance Grade | ISO h7, h8, h9 (Diameter tolerance down to -0.02 mm) |
| Straightness | ≤ 0.2 mm/meter |
| Surface Roughness | Ra ≤ 0.1 µm – 0.2 µm |
| Inspection | 100% Ultrasonic Flaw Detection & Laser Diameter Measurement |
Typical applications of precision-polished aluminum rods
| Application Areas | Component Cases | Performance Requirements |
|---|---|---|
| Semiconductor equipment | Vacuum chamber drive shaft, wafer fixture | Cleanliness Class 10, no magnetic residue |
| Optical instruments | Laser reflector bracket, guide rail | Straightness ≤0.02 mm, surface Ra ≤0.1 μm |
| Medical equipment | Surgical robot joint arm, CT machine slip ring | Biocompatibility certification (ISO 10993) |
| Precision measurement | Three-coordinate measuring needle rod, sensor base | Stable thermal expansion coefficient (23±2 ×10⁻⁶/℃) |
about us
GNEE focuses on the research and development of high-precision non-ferrous metal materials, has passed ISO 9001:2015 and IATF 16949 certifications, and serves the global precision manufacturing field.
Typical cooperation cases
A Korean semiconductor equipment manufacturer
Supply Φ8mm 6061-T6511 precision aluminum rods, used for etching machine drive shafts, with a yield rate of 99.8%;
A German company
Customized Φ50mm 7075-T7351 hard anodized aluminum rods, with a laser guide rail straightness of 0.015mm/m;
A Chinese medical technology company
Developed Φ12mm antibacterial-coated aluminum rods, passed the ISO 10993 biosafety test, with an annual delivery volume of over 200,000 pieces.
Consult now: Get technical parameters, samples, and customized solutions for precision-polished aluminum rods!
FAQs - GNEE Precision Ground Aluminum Bars
1. What Are the Tolerances, Straightness, and Roundness of GNEE Precision Ground Aluminum Bars?
GNEE precision ground aluminum bars are manufactured with strict dimensional control. The standard diameter tolerance is maintained within –0.02 mm, with straightness ≤ 0.2 mm/m and roundness reaching 0.005 mm, ensuring excellent dimensional stability for high-precision applications.
2. Are These Tolerances Equivalent to ISO Fit Grades?
Yes. A tolerance range of approximately ±0.02 mm closely aligns with ISO H7–H8 fit grades. These tolerances are tighter than H9 and are well suited for precision sliding fits or light interference fits commonly required in aerospace and engineering assemblies.
3. Do You Provide Both Metric and Imperial Sizes?
Yes. GNEE supplies precision ground aluminum bars in both measurement systems. Metric diameters range from 4 mm to 40 mm, while imperial sizes are available from 1/8″ to 1.5″, covering widely used international machining and design standards.
4. Can I Select Different Alloys According to Application Requirements?
Absolutely. GNEE offers a comprehensive selection of precision ground aluminum bars designed for various applications:
6262 aluminum - excellent machinability due to Pb/Bi content
6082 / 7075 / 2024 aluminum - high-strength alloys suitable for aerospace and structural components
6061 aluminum - versatile general-purpose alloy with good machinability; customized tempers such as 6061A and 6061G are also available
5. Are Stock Sizes Available? What Is the Typical Lead Time?
Yes. GNEE maintains inventory for many common sizes and alloys, including 2024, 6082, and 7075 aluminum bars. Customers can check inventory tables for available specifications. Stocked products support fast shipment, while customized orders are processed with short lead times.
6. Do You Support Custom Dimensions, Technical Drawings, or Sample Production?
Yes. GNEE provides customization services based on customer drawings and technical requirements, including special dimensions, tolerance specifications, and prototype sampling. Technical consultation and batch production support are also available.
7. Are GNEE Precision Aluminum Bars Certified?
All GNEE precision ground aluminum bars are produced under certified quality management systems, including ISO 9001 and AS9100, and comply with standards such as EN 754 and ASTM B211/B221. Material Test Certificates (MTCs) and complete quality traceability documentation can be supplied upon request.
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