sandblasting
Used to obtain a more uniform matte appearance and more consistent surface texture; suitable for surface preparation before cosmetic parts and spray coating/oxidation.
7075 Aluminum Alloy
Aluminum alloy 7075 (Al-Zn-Mg-Cu series) is a representative high-strength aluminum alloy, with advantages such as "very high strength/hardness and excellent lightweight effect," making it suitable for high-load-bearing structural parts and parts requiring high rigidity.
Quote checklist: Upload your 3D model and, when available, a 2D drawing. Identify the required process, material, quantity, critical dimensions, finish, appearance standard, and target delivery date.
Key Material and Manufacturing Parameters
Engineering note: Values below are typical reference ranges. Final manufacturability, tolerances, material condition, surface finish, cost, and lead time depend on the drawing, geometry, quantity, and selected process.
Upload CAD files and mark critical features for an engineering review before production.
| Process | CNC precision machining (aluminum alloy 7075) |
|---|---|
| Material | Aluminum alloy 7075 (higher strength, more suitable for high-strength structural parts) |
| Machining tolerance | ±0.2 mm (based on the key dimension requirements of the drawings/remarks; it is recommended to clarify the datum and tolerance zone) |
| Minimum wall thickness | ≥1.0 mm (thin-walled/long cantilever structures are recommended to undergo DFM review first) |
| Service temperature | 200℃ |
| Tensile strength | 320–460 MPa |
| Density | 2.65 g/cm³ |
| Surface treatment | Sand blasting, anodizing, powder coating, painting, screen printing, laser engraving, polishing, wire drawing |
| Typical lead time | Relevant to structural complexity, quantity, clamping difficulty and surface finishing; clear delivery and expedited options will be given after uploading the file |
Finishing
anodizing
Used to improve surface protection and appearance consistency; if there are mating surfaces/conductive surfaces/ground planes that need to be shielded, please specify them in the drawings or notes.
Dusting
Suitable for surface solutions that require stronger coverage and wear-resistant protection; it is recommended to note color, texture and masking requirements.
spray paint
Suitable for appearance color and texture requirements (matte/high gloss, etc.); it is recommended to provide reference pictures or clarify appearance standards.
screen printing
Suitable for logos, scales and other graphic information; it is recommended to provide vector files and location and size instructions.
Laser engraving
Used for permanent identification, serial numbers, QR codes, etc.; if higher contrast is required, it can be evaluated together with surface finishing solutions.
polish
Used to improve local or overall smoothness and texture; please mark the polishing range and appearance priority.
Brushed
Used to obtain a more consistent grain direction and metallic texture; please mark the drawing direction and appearance surface in the drawing.
Why Choose Aluminum Alloy 7075 (CNC Machining)
A lightweight solution that prioritizes strength
In the aluminum alloy system, it is more "high-strength" oriented and is suitable for parts that are more sensitive to strength, such as brackets, clamps, and load-bearing structural parts.
CNC delivery is fast-paced
It is suitable for continuous iteration from prototypes to small batches; when the drawings are clear and the benchmarks are clear, it is more conducive to rapid quote and stable delivery.
Appearance and protection can be combined
Supports various surface paths such as sandblasting, anodizing, powder coating, painting, wire drawing, and polishing to facilitate the balance between "appearance texture/protection/cost/lead time".
Adapt to assembly and marking needs
Marking can be completed through screen printing/laser engraving; key hole positions, mating surfaces and assembly benchmarks can be confirmed in advance during the DFM stage to reduce the risk of rework.
Recommended Applications
- High strength structural parts: Brackets, clamps, connectors, load-bearing parts, etc.
- Lightweight first: Hope to increase structural strength while controlling weight.
- Appearance/protection requirements: Sandblasting, anodizing, powder coating, painting, drawing/polishing and other combined paths
- Small and medium batch iteration: Prototype verification → small batch trial production → delivery rhythm of continuous revisions
It is not recommended to use it directly (it is recommended to change materials/processes)
- Long-term exposure to highly corrosive environments: Recommend evaluation of more corrosion-resistant material systems or enhanced surface protection strategies
- Requires extremely thin-walls/extremely deep cavities and is difficult to clamp: Prioritize DFM review or adjust structural accessibility
- Extremely sensitive to fit size after surface treatment: Masking and mating surface processing rules need to be defined in advance
- Pursuing mirror-like appearance and complex number of faces: It is necessary to evaluate the polishing range, texture direction and quality inspection criteria, otherwise the cost and cycle may increase significantly.
Design and DFM Guidelines
- Let’s first explain the benchmarks and tolerances clearly: It is recommended to mark the datum (A/B/C) and critical dimension tolerances on the 2D drawing; if there is no tolerance system, at least explain "which holes/surfaces are critical for assembly" in the remarks.
- Fillet and tool accessibility: Internal right angles usually require an internal R; for deep cavities/narrow grooves, please evaluate the tool protrusion and rigidity, and adjust the structure or parts if necessary.
- Thin walls and large flat surfaces: Thin walls are prone to tool vibration and deformation, and processing textures are prone to appear on large surfaces; risks can be reduced through reinforcement, zoning processing, and clear priority of appearance surfaces.
- Threads and mounting holes: Please specify the thread specifications, hole depth and whether it is a through hole; if a matching hole/shaft hole is required, it is recommended to mark the matching level and detection method.
- Surface treatment and masking: Anodizing/powder coating/painting, etc. will change the surface state; whether the mating surface, conductive surface, and positioning reference surface should be processed needs to be defined in advance.