Precision Ground Aluminum Rod Bar

A precision ground aluminum rod bar is a high-precision aluminum alloy rod processed by centerless grinding. It offers extremely tight diameter tolerance, excellent straightness, and roundness. The double-ended chamfer design ensures smooth feeding in automatic machines. Compared to cold finished bars, it provides better dimensional consistency, higher machining stability, and improved yield rate. It is especially suitable for Swiss-type CNC lathes with spindles above 8000 rpm, and is widely used in aerospace, medical, and precision equipment industries.

• Diameter tolerance ≤ ‑0.02 mm
• Straightness ≤ 0.2 mm / meter
• Roundness 0.005 mm

Chalco hot sale precision ground aluminum rod

2011 Precision Ground Aluminum Rod Bar

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 Bar

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.

2017-T4 Aluminum Ground Rods in Stock

Standard:EN 573 , DIN EN 754-3 , BS EN 755 , ASTM B211 , ASTM B221 , QQ-A-225/5

2024 Precision Ground Aluminum Rod Bar

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.

2024 Aluminum Ground Rods in Stock

Standard:EN 573,DIN EN 754-3,BS EN 755,ASTM B211,ASTM B221,QQ-A-225/6

5052 Precision Ground Aluminum Rod Bar

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 Bar

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 Bar

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.

To meet growing environmental and machining demands, Chalco also supply a Pb-free free-cutting 6061A alloy, which eliminates toxic elements like lead and bismuth. It achieves cutting performance comparable to 6064 , offering smooth chip breaking and reduced tool wear while maintaining surface precision and minimizing deformation. This eco-friendly and RoHS-compliant alternative is ideal for precision parts in medical, automotive, electronics, and aerospace sectors requiring both high efficiency and sustainability.

6061 Aluminum Ground Rods in Stock

Standard:EN 573,DIN EN 754-3,BS EN 755,ASTM B211,ASTM B221,QQ-A-225/8

6262 Precision Ground Aluminum Rod Bar

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 Bar

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.

6082 Aluminum Ground Rods in Stock

Standards: EN 573, DIN EN 754-3, BS EN 755, ASTM B211, ASTM B221

7075 Precision Ground Aluminum Rod Bar

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

7075 Aluminum Ground Rods in Stock

Standards: ASTM B211, QQ-A-225/9, EN 573, DIN EN 754-3, BS EN 755

Chalco 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.

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.

Chalco's Grinding Services as an Aluminum Supplier

Chalco 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 Chalco'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.

Chalco precision ground aluminum rod dimensional tolerance chart

Chalco precision ground aluminum rods are manufactured with a standard tolerance of ±0.02 mm, which is equivalent to ISO 286 H7–H8 tolerance grades. This ensures high dimensional stability, making them ideal for aerospace shafts, machined bushings, and tight sliding fits. Both metric and inch sizes are available, and custom tolerances (e.g. H6 or h7 fits) can be provided upon request.

Precision ground aluminum rod imperial size tolerance chart

Available in inch sizes, with tight tolerances equivalent to ISO H7–H8 fits.

Precision ground aluminum rod metric size tolerance chart

Available in metric sizes, manufactured with a standard tolerance of ±0.02 mm, equivalent to ISO H7–H8.

In addition to the standard tolerance chart, we also offer a practical Fit and Tolerance Calculator to assist engineers and purchasing managers with quick selection and machining optimization.

Production process of precision ground aluminum rod

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

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.

Chalco other hot selling aluminum rods

2011 aluminum bar

2017 aluminum bar

2024 aluminum bar

2618 aluminum bar

3003 aluminum bar

4032 aluminum bar

5052 aluminum bar

5083 aluminum bar

6061 aluminum bar

6063 aluminum bar

6082 aluminum bar

7075 aluminum bar

Product list of precision ground aluminum rod

FAQs

1. What Are the Tolerances, Straightness, and Roundness of Chalco Precision Ground Aluminum Bars?

Our standard diameter tolerance is within -0.02 mm, with straightness ≤ 0.2 mm/m and roundness up to 0.005 mm, ensuring high dimensional stability for critical applications.

2. Are These Tolerances Equivalent to ISO Fit Grades?

Yes. A tolerance of ±0.02 mm corresponds closely to ISO H7–H8 fits, which are tighter than H9 and ideal for precision sliding or light interference fits in aerospace and engineering assemblies.

3. Do You Offer Both Metric and Imperial Sizes?

Yes. Chalco supplies metric sizes from 4 mm to 40 mm and imperial sizes from 1/8″ to 1.5″, covering the most common global machining and design standards.

4. Can I Choose by Alloy Type Based on My Application Needs?

Absolutely. We offer a full range of precision ground aluminum bars in alloys tailored to different needs:

• 6262: Excellent machinability with Pb/Bi content
• 6082 / 7075 / 2024: High strength for aerospace and structural use
• 6061: General-purpose machinable alloy; customized tempers such as 6061A, 6061G are also available

5. Are There Stock Sizes Available? What Is the Lead Time?

Yes. Many sizes and alloys like 2024, 6082, and 7075 are in stock. Refer to the inventory tables for real-time size availability. We offer rapid shipping for stocked items and fast processing for custom orders.

6. Do You Support Custom Dimensions, Drawings, or Samples?

Yes. Chalco supports custom machining, tolerance requests, and prototype sampling based on technical drawings. We also assist with technical consultations and batch production.

7. Are Your Products Certified?

All Chalco precision bars are backed by ISO 9001 / AS9100 certifications and comply with EN 754, ASTM B211/B221. Material Test Certificates (MTCs) and full quality traceability reports can be provided upon request.