No wood burrs are present on the surface of our designed screws after installation

This R&D case study evaluates the flatness performance of Taiwan Shan Yin's newly designed screw after installation into different wood materials. The test focuses on whether mushrooming, burrs, cracks, or uneven surface conditions appear around the screw head after drilling into wood.

For wood screws, chipboard screws, furniture screws, and construction screws, surface flatness after installation is an important factor. Better flatness and fewer burrs around the screw head can help improve appearance, reduce wood surface damage, and support cleaner fastening results.

New Product Feature

• Good flatness.
• No mushroom / burr happens in the demonstrated test.

Test Purpose

• To evaluate flatness when screws drill into wood.
• To compare flatness after drilling into wood with market competitors.
• To observe burrs, mushrooming, cracks, and wood surface condition after completed drilling.

Test Method

• Different hardness levels of wood were used for testing.
• Different brands of screws were compared.
• The test used a HILTI air gun and 2,000 RPM.

Test Screw Data

• A: Sxxx - Competitor
• B: Sxx
• C: Chipboard
• D: Sunny Head Bimate Screw (TSY)
• E: Bxx
• F: Wxxxx - Competitor

Wood Types

Bench Wood Flatness Observation

Bench wood was used as a middle-hard wood material for the flatness comparison. The test observed screw appearance before drilling fully, after drilling fully, and detailed flatness around each screw head.

According to the demonstrated result, the new design head with Bimate screw showed better flatness after drilling into bench wood. The surface condition around the screw head appeared cleaner compared with several other samples.

Brazil Wood Flatness Observation

Brazil wood was used as a very hard wood material for the flatness comparison. The test compared the surface condition after completed drilling and observed whether burrs, cracks, or uneven wood surface conditions appeared around each screw head.

According to the demonstrated result, the new design head with Bimate screw showed better flatness after drilling into Brazil wood compared with several other samples.

Pine Wood Flatness Observation

Pine wood was used as a soft wood material for the flatness comparison. The test observed the screw surface condition after completed drilling and compared whether mushrooming or burrs appeared around the screw head.

The original report indicates that there is better flatness for the new design head with Bimate screw after drilling into pine wood.

Detailed Observation for Flatness

The detailed observation compared each screw after installation. The surface around some competitor screws showed visible burrs or rougher wood surface conditions, while the Sunny Head Bimate Screw showed a cleaner and flatter appearance in the demonstrated comparison.

In the original conclusion, each screw was drilled into three types of wood to observe the flatness after completed drilling. The new design screw showed better flatness than the compared samples, with no mushrooming or obvious burrs observed in the demonstrated test.

Testing Conclusion

Based on the demonstrated R&D case study, Taiwan Shan Yin's newly designed screw showed good flatness after installation into different wood materials. The test supports the application value of Sunny Head Bimate Screw for wood fastening, chipboard installation, furniture assembly, woodworking, and construction fastening applications where clean surface finishing is important.

This testing report demonstrates Taiwan Shan Yin's product testing approach for wood screws, chipboard screws, Bimate screws, and customized fastening solutions. By comparing flatness, burrs, drilling-in condition, and drilling-out condition, buyers can better evaluate how screw head design may affect wood surface appearance and fastening quality.