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As an aluminum circle manufacturer, we produce 200 mm - 800 mm diameter aluminum circles for lampshades used in residential lighting, commercial fixtures, industrial lamps, decorative lighting, and customized shade assemblies. Our production is focused on stable forming performance, consistent surface quality, accurate dimensions, and reliable batch-to-batch control for lighting manufacturers that require aluminum blanks ready for spinning, stamping, deep drawing, polishing, anodizing, or coating.

Aluminum circles for lampshades are different from general-purpose sheet blanks. During lamp shade production, the disc may be stretched, spun, flanged, punched, trimmed, brushed, painted, or anodized. Any variation in hardness, burr height, surface condition, or diameter tolerance can affect forming stability and final appearance. For this reason, we control each step from coil selection and slitting to blanking, leveling, annealing, inspection, and packaging.

Manufacturing Focus for Lampshade Aluminum Discs

Our factory supplies aluminum circles for lampshades in common diameters from 200 mm to 800 mm. This range covers small pendant lamp shades, table lamp reflectors, ceiling lamp housings, downlight accessories, wall lamp covers, and wide decorative shades. The material can be produced from cold rolled or hot rolled aluminum coil depending on the alloy, thickness, temper, and forming depth required by the customer.

For lighting applications, manufacturers often require a balance between formability and appearance. Soft tempers such as O, H12, and H14 are frequently selected for spinning and drawing. When the lampshade requires better rigidity after forming, H16, H18, or selected semi-hard tempers may be used. We recommend the alloy and temper based on the drawing height, forming method, surface process, and final assembly structure.

Our related product page for Aluminum Circles for Lampshades provides additional product information for buyers who need standard specifications and customized supply options.

Main Technical Parameters

The following table shows typical production parameters for 200 mm - 800 mm aluminum circles for lampshades. Custom requirements can be evaluated according to drawings, samples, or forming process details.

Alloy Selection for Lampshade Production

Different lampshade designs require different aluminum alloys. Pure aluminum grades such as 1050, 1060, 1070, and 1100 are widely used when excellent ductility, high surface brightness, and easy forming are required. These alloys are suitable for spun lamp shades, shallow drawn reflectors, and decorative lamp covers that require polishing or anodizing.

3003 and 3004 aluminum circles provide higher strength than pure aluminum while maintaining good forming performance. These alloys are often selected for lamp housings, larger shades, and parts that need improved rigidity after forming. For some lamp components exposed to more demanding environments, 5052 aluminum circles may be considered due to better corrosion resistance and mechanical strength, although forming parameters must be carefully matched.

When the customer provides a final lampshade drawing, we evaluate the diameter, forming depth, radius, trimming allowance, and surface finishing requirements. This helps us recommend whether a soft deep drawing aluminum circle, a semi-hard aluminum disc, or a surface-treated blank is more suitable.

Diameter Range from 200 mm to 800 mm

The 200 mm - 800 mm diameter range is commonly used in the lighting industry because it covers many practical lampshade sizes. Smaller 200 mm to 350 mm aluminum circles are often used for compact lamp covers, downlight components, table lamp reflectors, and pendant light shades. Medium sizes from 350 mm to 600 mm are suitable for commercial pendant lamps, ceiling fixtures, and decorative shade bodies. Larger 600 mm to 800 mm aluminum discs are used for wide shades, industrial lighting covers, reflector structures, and architectural lighting components.

Accurate diameter control is important because the blank size directly affects forming height, trimming loss, and final product symmetry. If the blank is too large, the formed shade may produce excessive edge material and unnecessary waste. If the blank is too small, the lampshade may fail to reach the required height or flange width. Our production team can help customers optimize blank diameter according to the finished shade geometry.

Surface Requirements for Lighting Applications

Lampshades are visible components, so surface quality is one of the main control points. Depending on the downstream process, customers may require mill finish, brushed finish, mirror finish, anodizing quality surface, or pre-coated aluminum circles. For painted lamp shades, the disc surface should be clean, flat, and free from heavy oil stains, oxidation marks, scratches, and pressure marks. For anodized or polished lampshades, stricter surface control is required because defects may become more visible after finishing.

During production, we inspect the aluminum coil and finished circles for surface defects. Protective film or paper interleaving can be used when the surface finish requires extra protection. For special decorative shades, customers may also consider Color Coated Aluminum Circle options to reduce downstream coating work and improve color consistency.

Formability and Temper Control

Forming performance is a core requirement for aluminum circles for lampshades. Spinning and deep drawing create continuous deformation from the center to the edge of the disc. If hardness is inconsistent, the part may show orange peel, cracking, uneven wall thickness, wrinkling, or poor edge stability. To reduce these risks, we control annealing temperature, holding time, coil flatness, and mechanical properties.

For deep lampshades, O temper is commonly used because it provides excellent elongation. For shallow covers or parts that require better strength, H12 or H14 may be selected. If the lamp component is mainly stamped or used as a flat cover with limited deformation, harder tempers can be considered. We advise customers to confirm the forming process before ordering, especially for large diameter aluminum discs above 600 mm, because diameter, thickness, and temper have a combined effect on production stability.

Edge Quality and Burr Control

The blanking edge affects both safety and forming performance. A high burr may scratch tooling, damage the surface during stacking, or create defects during spinning and trimming. Our aluminum circle production uses controlled blanking dies and regular die maintenance to reduce burr height. For applications with stricter edge requirements, secondary deburring or edge inspection can be arranged.

Burr direction can also be important. Some customers request the burr side to face a specific direction for the convenience of feeding, spinning, or stacking. We can mark the pallet or packaging according to the agreed production method to help the customer's workshop identify the correct side during use.

Production and Quality Control Process

Our manufacturing process begins with aluminum coil selection. The coil is checked for alloy, temper, thickness, width, surface, and mechanical property data. After confirmation, the coil is slit or prepared for circle blanking. The circles are then punched or cut with appropriate tooling according to the required diameter. Leveling, annealing, cleaning, inspection, and packaging are arranged based on the order specification.

Quality control includes dimensional inspection, surface inspection, thickness measurement, edge evaluation, and random sampling for mechanical properties when required. For export orders, we can provide mill test certificates, packing lists, and other documents according to customer requirements. Traceability is maintained from raw material to finished aluminum circle discs, which supports stable procurement for lighting manufacturers.

Packaging for Export and Workshop Handling

Aluminum circles for lampshades must be packed to prevent moisture, deformation, surface friction, and edge damage. We normally use moisture-proof paper, plastic film, pallet boards, corner protection, and steel straps for export packing. For high surface requirements, paper interleaving or protective film can be added. Pallet weight and stack height can be adjusted according to customer unloading equipment and warehouse conditions.

Clear labels are applied to each package, including alloy, temper, diameter, thickness, quantity, net weight, gross weight, and order information. This helps customers manage production batches and reduces the risk of mixing materials with similar dimensions.

Ordering Information for Manufacturers

To manufacture the correct lampshade aluminum discs, we recommend that customers provide the following details when sending an inquiry: alloy, temper, diameter, thickness, quantity, surface requirement, edge requirement, forming method, and final application. If the alloy or temper has not been confirmed, drawings or samples of the finished lampshade can help us evaluate suitable material options.

For OEM lighting manufacturers, stable material supply is as important as price. A small change in aluminum circle hardness, surface condition, or diameter tolerance can affect forming yield and finishing cost. As a factory, our objective is to supply aluminum circles that match the actual production process, reduce unnecessary rework, and support repeat orders with consistent specifications.

Conclusion

Large diameter aluminum circles for lampshades are widely used in modern lighting manufacturing due to their light weight, formability, corrosion resistance, and clean appearance after finishing. By selecting the correct alloy, temper, thickness, surface condition, and diameter tolerance, lighting manufacturers can improve forming stability and achieve consistent lampshade quality.

As an aluminum circle manufacturer, we supply customized aluminum discs for spinning, stamping, deep drawing, anodizing, polishing, and coating processes. With controlled production, technical specification support, and export packaging, we provide reliable lampshade aluminum circle solutions for international lighting factories and engineering buyers.