Sand Blasting Surface Finish Supplier In China
Sand Blasting, also known as abrasive blasting, is a highly effective surface treatment that propels a stream of abrasive media against a part to create a uniform, non-reflective matte texture. This process is ideal for removing cosmetic imperfections from machining, reducing glare, and preparing surfaces for subsequent coatings. As a leading industrial supplier in China, Celerity Precision utilizes specialized in-house blasting equipment to deliver consistent, high-quality sand-blasted finishes for both metal and hard plastic components, ensuring your parts have a clean, professional appearance and enhanced paint adhesion.
For a reliable supply of parts with a consistent, high-quality sand-blasted finish, partner with Celerity Precision for your next project.
Your Sand Blasting Surface Finish Manufacturer
At Celerity Precision, we don’t just supply sand-blasted parts; we manufacture them through a meticulously controlled process. Our dedicated blasting facility houses various automated and manual sand blasting cabinets, allowing us to handle parts of different sizes and geometries with precision. We carefully select the abrasive media type (such as glass beads, aluminum oxide, or plastic beads) and control critical parameters like air pressure and nozzle distance. This expert control allows us to achieve specific surface roughness values and visual effects, from a fine, satin sheen to a more coarse, textured finish, depending on your application’s requirements.
Our integrated manufacturing approach means your parts move seamlessly from our CNC centers to our finishing department. This one-stop-shop capability eliminates logistical complexities, shortens lead times, and ensures total accountability for the final quality. We meticulously mask critical features, threads, and tolerance-sensitive surfaces before blasting to protect the integrity of your design. Celerity Precision is the trusted manufacturer that combines precision machining with expert finishing to deliver production-ready components.
Upload your CAD file and specify your desired Sand Blasting finish to get a fast, accurate quote from a true manufacturing partner.
Sand Blasting: Technical Specifications
| Feature | Description |
| Surface Roughness (Ra) | Typically ranges from 1.6 μm to 6.3 μm (63 μin to 250 μin), depending on the base material, abrasive media, and blasting intensity. |
| Applicable Materials | Most metals including Aluminum, Steel, Stainless Steel, and Titanium. Some hard plastics like ABS, PC, and PEEK can also be blasted. |
| Cosmetic Availability | Excellent. Ideal for creating a high-quality, uniform, and non-reflective cosmetic appearance. Hides fingerprints and minor surface defects. |
| Visual Appearance | A granular, frosted, or satin matte finish. The texture is uniform and non-directional, with a low-sheen or completely flat look. |
Advantages of Sand Blasting Surface Finish
Uniform Matte Appearance
Creates a clean, visually appealing, non-reflective finish that conceals imperfections from machining.
Enhanced Surface for Coatings
The textured surface profile significantly improves adhesion for paint, powder coating, and other coatings.
Removal of Minor Burrs
The abrasive action can effectively remove small burrs and smooth sharp edges left over from machining.
Improved Fatigue Resistance
The process can induce compressive residual stress on the surface of metal parts, which can increase fatigue life.
Cleans and Prepares Surfaces
It is an excellent method for removing contaminants, scale, or rust from a part's surface.
Versatile Aesthetic Control
Different media and pressures can be used to achieve a wide range of matte textures, from very fine to coarse.
Sand Blasting Design Considerations
Masking is Crucial
Any threaded holes, mating surfaces, or features with tight tolerances must be identified for masking to prevent dimensional changes.
Wall Thickness
Thin walls or delicate features (under 0.8mm) may be susceptible to warping or damage during the blasting process and should be reviewed.
Internal Geometries
Blasting is a line-of-sight process. Deep internal cavities or complex, hidden channels may not receive a uniform finish.
Material Removal
Sand blasting is an abrasive process that removes a small amount of material (typically 0.01-0.05mm). This should be accounted for in the design if tolerances are critical.
FAQ
What is the difference between sand blasting and bead blasting?
They are similar processes. “Sand blasting” is a general term. “Bead blasting” specifically refers to using glass beads as the media, which typically results in a smoother, brighter satin finish. We offer both.
Will sand blasting change the dimensions of my part?
Yes, it is an abrasive process and will remove a very small amount of material. We protect critical tolerance zones by masking them before the process.
Can all materials be sand blasted?
Most metals are excellent candidates. Harder plastics (like ABS, PC) can be blasted, but soft or rubbery plastics (like TPU) are not suitable as they absorb the impact.
How do I choose the right "grit" or coarseness?
Our standard process creates a uniform matte finish suitable for most applications. If you require a specific texture (e.g., fine, medium, coarse), please specify this on your drawing or RFQ, and our engineers can advise.
Is sand blasting good for parts that will be painted?
Yes, it is one of the best preparation methods. It creates a micro-textured surface profile that dramatically increases the surface area for paint to adhere to.
Will sand blasting remove deep scratches or tool marks?
It will effectively blend and hide fine tool marks and very light scratches, but it will not remove deep gouges or scratches.
Do I need to worry about features like threads and holes?
No. Our standard procedure is to plug and mask all threaded holes and critical tolerance surfaces to protect them from the abrasive media.
Can you sand blast very large or very small parts?
Yes, our facility is equipped with different-sized blasting cabinets to accommodate a wide range of part sizes.
What does a sand-blasted finish feel like?
It has a fine, granular texture. Depending on the media used, it can range from a smooth, satin feel to a slightly rougher, grittier texture.
How do I specify a sand blast finish?
Simply state “Finish: Sand Blast, Medium Grit” (or your desired coarseness) on your technical drawing. It’s also helpful to indicate which surfaces should be masked.