Precision Ground Aluminum Rod Bar
Precision ground aluminum rod bar is high-precision aluminum alloy bars machined using centerless grinding. They offer extremely tight diameter tolerances, excellent straightness, and roundness. The double-headed chamfering design ensures smooth feed in automated machines.
Compared to cold finished aluminum bar, they offer better dimensional consistency, higher machining stability, and higher yield. They are particularly suitable for Swiss-type CNC lathes with spindle speeds exceeding 8000 rpm and are widely used in the aerospace, medical, and precision equipment industries.
- Diameter tolerance ≤ ‑0.02 mm
- Straightness ≤ 0.2 mm / meter
- Roundness 0.005 mm
Advantages of precision ground aluminum rod bar |
Small diameter tolerance, good straightness, high material consistency, excellent true roundness, stable production, and convenient for subsequent processing. |
| Superior straightness supports high-speed spindles above 8000, effectively improving production efficiency, reducing equipment damage, and extending equipment life. | |
| Chamfering at both ends of the material for easy automatic feeding, no material jamming, improving operational efficiency, and maintaining high-quality finished products. | |
| Manufactured with high-quality alloy for outstanding machining performance. | |
| Cost-effective in terms of material and labor, reduces waste and rework, and increases material yield. |
HSTF Hot Selling Precision Ground Aluminum Bar Product
We stock a wide selection of cold finished aluminum bars that meet ASTM B211,AMS-QQ-A-225 standards, ready for immediate delivery. Available in multiple alloys and sizes with tight tolerances and excellent machinability for aerospace and precision manufacturing.
2011 Precision Ground Aluminum Rod
| Temper: T3, T6, T8 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
2011 is a free-cutting aluminum alloy with copper, and trace lead and bismuth for enhanced machinability. It offers high strength and excellent cutting performance, though with lower corrosion resistance. Precision ground bars have a smoother surface and tighter tolerance, ideal for CNC automatic feeding. Commonly used in screws, shafts, and small precision parts in aerospace, automotive, and machinery industries. Lead-free variants with tin and bismuth are also available to meet environmental standards.
Standard: EN 573, DIN EN 754-3, BS EN 755, ASTM B211, ASTM B221, QQ-A-225/3
2017 Precision Ground Aluminum Rod
| Temper: T4, T451 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
2017 is a high-strength aluminum alloy with excellent machinability, cutting performance, and fatigue resistance. After precision grinding, it offers improved dimensional stability and surface quality. Suitable for heat treatment, especially in T4 and T451 tempers, it performs well under stress and elevated temperatures. Commonly used in structural parts of aircraft, ships, transport equipment, and CNC-machined screw or thread components.
Standard:EN 573 , DIN EN 754-3 , BS EN 755 , ASTM B211 , ASTM B221 , QQ-A-225/5
2024 Precision Ground Aluminum Rod
| Temper: T3, T4, T351 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
2024 is a high-strength aluminum alloy with a high copper content, offering excellent fatigue resistance and strength-to-weight ratio. After precision grinding, it delivers better dimensional stability and smoother surface finish. Widely used in aerospace structural parts, it meets the rigorous performance requirements for aircraft fittings, fasteners, and stressed components.
Standard:EN 573,DIN EN 754-3,BS EN 755,ASTM B211,ASTM B221,QQ-A-225/6
5052 Precision Ground Aluminum Rod
| Temper: H112, H34, H36 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
5052 is the most widely used anti-corrosion aluminum alloy, known for its high strength, excellent formability, and corrosion resistance. After precision grinding, 5052 aluminum rod achieves superior surface finish and dimensional stability, making it ideal for applications in fuel tanks, lubricating oil pipes, marine fittings, and various deep-drawing parts under moderate loading.
Standards: ASTM B221, EN 754, JIS H4000, ISO 6361
5083 Precision Ground Aluminum Rod
| Temper: H112, H34, H36 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
5083 aluminum rod is a medium-strength Al-Mg alloy known for excellent corrosion resistance, formability, and weldability. After precision grinding, it delivers improved surface finish and dimensional accuracy. Commonly used in shipbuilding, vehicle weldments, refrigerated containers, aerospace structures, and military-grade applications.
Standards: ASTM B209, EN 573, EN 485, DIN 1725, QQ-A-200/4
6061 Precision Ground Aluminum Rod
| Temper: T4, T6, T651 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
6061 is a versatile heat-treatable aluminum alloy containing magnesium and silicon, known for its excellent strength, corrosion resistance, formability, and weldability. After precision grinding, it delivers enhanced dimensional accuracy and surface finish, making it ideal for aerospace fixtures, electrical components, communication parts, and a wide range of precision-machined products.
Standard:EN 573,DIN EN 754-3,BS EN 755,ASTM B211,ASTM B221,QQ-A-225/8
6262 Precision Ground Aluminum Rod
| Temper: T4, T6 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
6262 precision ground aluminum rod is a medium-strength heat-treatable alloy known for its excellent machinability, corrosion resistance, and moderate strength. It contains magnesium, silicon, copper, and chromium, with lead and bismuth added to enhance free-cutting performance. This makes 6262 ideal for precision-turned parts such as screw machine products, bushings, camera components, couplings, and marine fittings—especially where high processing efficiency and surface finish are required.
Standard:EN 573, DIN EN 754-3, BS EN 755, ASTM B211, ASTM B221, QQ-A-225/10
6082 Precision Ground Aluminum Rod
| Temper: T4, T6, T651 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
6082 precision ground aluminum rod is a medium-strength heat-treatable alloy offering good formability, weldability, and machinability. It retains excellent operability even after annealing, making it ideal for high-performance mechanical structures. Typical applications include aircraft parts, camera mounts, lens housings, marine fittings, hinge mechanisms, magnetic heads, water pistons, brake pistons, valve components, and electrical hardware—especially where strength and surface precision are equally critical.
Standards: EN 573, DIN EN 754-3, BS EN 755, ASTM B211, ASTM B221
7075 Precision Ground Aluminum Rod
| Temper: T6, T651 | Diameter Tolerance: ≤ ‑0.02 mm | Straightness: ≤ 0.2 mm/m |
| Roundness: 0.005 mm | Surface Roughness: < Ra 0.3 µm |
Standards: ASTM B211, QQ-A-225/9, EN 573, DIN EN 754-3, BS EN 755
HSTF offers a wide range of precision ground aluminum rods in stock with complete sizes and stable tolerances, widely used in aerospace, machining, and mold industries. Custom specifications and sample machining based on drawings are available.
HSTF Hot Selling Aluminum Bar
HSTF Aluminum Rod Grinding Service
Our focuses on providing precision centerless grinding services, utilizing grinding wheels to remove surface material from aluminum round bars. This process achieves a flawless, uniform, and polished surface on the aluminum rods. This critical manufacturing step ensures the highest quality and precision of the aluminum round bars, featuring excellent straightness and roundness, minimizing vibrations during high-speed rotations. Key highlights of HSTF’s grinding services include:
- Centerless Grinding Services: Producing precise roundness and polished surfaces on high-quality materials.
- Chamfering: Creating enclosed chamfered ends for materials tailored to specific purposes.
- Custom Machining: Expert operations to meet stringent customer requirements.
- Metal Turning Services: Enhancing physical surface textures through turning operations.
- Milling: Employing progressive metal removal processes for rough-cut milling and precision finishing.
Production Process of Precision Ground Aluminium Rod Bar
We follow a strict, multi-step process to ensure exceptional straightness, surface finish, and dimensional accuracy:
- High-Quality Billets:Homogenized aluminum billets are selected and inspected to ensure internal integrity.
- Hot Extrusion & Heat Treatment:Bars are hot-extruded and heat-treated (T6/T651) to achieve consistent strength and hardness.
- Peeling & Chamfering:Surface defects are removed by peeling or rough turning, followed by chamfering for smooth feeding.
- Cold Drawing & Stress Relief:Cold drawing improves dimensional accuracy, while stress-relief annealing ensures stability during grinding.
- Centerless Grinding & Polishing:Multi-pass grinding achieves h8/h9 tolerances, excellent roundness, and Ra ≤ 0.2 µm surface finish.
- Cleaning, Inspection & Packaging:Finished bars are ultrasonically cleaned, fully inspected, vacuum-packed, and protected for global delivery.
Precision Ground Aluminum Rod vs. Cold-Finished(CF) Aluminum Bar
| Comparison Item | Precision Ground Aluminum Rod | Cold-Finished (CF) Aluminum Bar |
| Outer Diameter Tolerance | ±0.01 mm | ±0.03 mm |
| Roundness | < 0.005 mm | < 0.01 mm |
| Straightness | < 0.2 mm/m | < 0.3 mm/m |
| Surface Roughness | Ra ≤ 0.1 µm | Ra ≤ 0.3 µm |
| Spindle Speed Compatibility (CNC) | 8000 rpm and above | 5000 rpm and below |
| Manufacturing Process | Precision grinding after extrusion or drawing | Cold drawing (no grinding step) |
| Surface Treatment | Grinding and polishing required | Smooth surface from drawing process |
| Cost | Higher (due to slower speed and additional grinding) | Lower (mass production, faster cycle) |
| Key Features | High dimensional accuracy, true roundness, and surface quality | Good straightness, smooth surface, and cost-efficiency |
| Typical Applications | Precision instruments, medical clamps, climbing safety parts | Mechanical parts, engine accessories, tent pegs, rivets |
When your application demands extremely high requirements for dimensional accuracy, roundness, straightness, and surface finish—especially for high-end precision parts such as medical devices, safety buckles, or core motion components—we recommend using precision ground aluminum rods.
If your project focuses more on surface smoothness, production efficiency, and cost control, and can accept slightly wider tolerances, we suggest using cold-finished (CF) aluminum bars, such as for aerospace rivets, automotive accessories, or general hardware components.
Learn more on our Cold-Finished Aluminum Bar product page.
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