Tumbling Polishing

What's Tumbling Polishing?

TDB Tech provides controlled tumbling and polishing for deburring and appearance improvement from two manufacturing facilities in Hanoi with more than 2,500 m² of combined production space. Founded in 2015 and 100% Vietnamese-owned, we support DFM, prototypes, repeat production and international delivery for customers in the United States, Europe, Canada and Australia.

Deburring

Edge Radiusing

Surface Smoothing

Cleaning and Descaling

Brightening and Polishing

Tumbling Polishing Cases

Key Parameters for Consistent Tumbling Results

Media Selection

Ceramic, plastic or steel media is selected according to the alloy, part geometry and target cutting or polishing action.

Cycle Time and Compound

Processing time and compound concentration are controlled to remove burrs without rounding critical features beyond specification.

Part Protection

Delicate surfaces, threads and tight-tolerance features are reviewed before processing. Protective methods or separate batches may be recommended.

Batch Efficiency

Batch size, media loading and cycle time are balanced to achieve repeatable finishing while controlling cost for low- and medium-volume orders.

Quality Checks for Tumbled and Polished Parts

Test Item	Inspection Standard
Appearance	Parts are visually checked for a uniform finish, residual burrs, embedded media, staining and handling damage. Critical edges and protected features are reviewed against the drawing or approved sample.
Dimensional Verification	Critical dimensions are verified after finishing when material removal could affect fit, sealing surfaces or assembly performance.
Surface Condition	Surface appearance and roughness are evaluated according to the drawing, approved sample or agreed inspection method.
Cleanliness	Finished parts are cleaned to remove compound and media residue before final inspection and packaging.
Documentation	Inspection records and material documentation can be prepared according to the agreed project requirements.

Tumbling Polishing FAQs

How do I know whether tumbling polishing is suitable for my component?

Send TDB Tech the drawing, material, quantity and target finish. Our engineering team will review geometry, protected features and the next manufacturing operation before recommending a process.

Which materials are suitable for tumbling polishing?

Tumbling is commonly used for aluminum, stainless steel, brass, copper and selected engineering components. Suitability depends on hardness, geometry, wall thickness and cosmetic requirements.

How is the tumbling cycle determined?

Cycle time is established from the starting surface, burr size, alloy, media and target finish. Trial samples may be used to confirm the process before a production batch.

What are the main benefits of tumbling polishing?

The process can deburr many parts consistently, soften sharp edges, improve surface uniformity and prepare components for subsequent anodizing, plating or assembly.

Can TDB Tech match an approved surface sample?

Yes. Send the drawing, photographs or a reference sample. TDB Tech will review the measurable and visual acceptance criteria with the selected finishing partner.

Can tumbling be combined with other finishes?

Yes. Tumbling can be used before anodizing, electroplating, passivation or painting when the sequence is technically appropriate for the material and finish.

What is the difference between Edge Radiusing and spray painting?

Edge Radiusing involves applying a dry powder to the surface, which is then cured under heat to form a solid layer. It is highly durable and environmentally friendly. Spray painting involves applying liquid paint with a spray gun. Both methods have their advantages, and the choice depends on the specific requirements of your project.

Can TDB Tech provide trial samples before production?

Trial processing can be agreed for suitable projects so that media, cycle time and acceptance criteria are confirmed before the full batch.

What information is needed for a tumbling quotation?

Yes, spray-coating is versatile and can be applied to both large and small parts. Our equipment and expertise allow us to handle a wide range of sizes and shapes, ensuring a high-quality finish regardless of the part’s dimensions.