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LBTD 501 Fully Automatic Circular Scanning Tester

The circle‑scoring method for evaluating the adhesion between a coating film and its substrate is the most traditional approach in China.

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Paint, Coating Film, and Coating Testing Instruments

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lbt@lbt.ltd

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+86-15102211717

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LBTD 501 Fully Automatic Circular Scanning Tester

Description

Product Introduction

The circle‑drawing method for evaluating the adhesion between a coating film and its substrate is the most traditional approach in China. This method employs a specially designed instrument to draw numerous circles of uniform diameter in succession on the coating film under test; these circles overlap at specified intervals. The resulting pattern is then divided into seven zones according to the area of overlap among the circles. During evaluation, the integrity of the coating in each zone is assessed, and the corresponding grade is assigned when more than 70% of the coating area in a given zone remains intact.

The LBTD 501 is the latest fully automatic circular‑scanning tester available in China. Compared with other conventional domestic models, it features the following characteristics:

◆ All-aluminum oxidized body—premium, stylish, and lightweight.

◆ A dedicated indicator light automatically determines whether the stylus has penetrated the coating to the substrate, offering accurate and convenient operation.

◆ Special precision-machined scribing needles ensure excellent consistency among different needles.

◆ The electric motor completes circular motions with uniform speed and consistent force, ensuring that the test results exhibit high reproducibility and comparability.

◆ A sliding platform enables multiple tests to be conducted at different locations on the same test specimen.

◆ Rotatable work arm design, making it extremely convenient to change the stylus and test plates.

◆ A double-nut mechanism is used to adjust the lead screw clearance, ensuring smoother platform operation and minimizing errors caused by thread backlash, thereby improving measurement accuracy.

◆ The work platform employs dual‑guide linear positioning, offering smoother operation than a single‑rail guide system.

◆ After completing a single test, you can return to the starting point with a single click.

◆ The dedicated tool makes the installation and removal of the scribing needle more convenient and faster.

◆ Precision machining of threads controls the circle diameter, resulting in more accurate test outcomes.

◆ The work platform’s start and end points are precisely positioned, ensuring that each test consistently achieves the specified stroke.

◆ Use a multi‑stage weight combination to achieve the most suitable weight load.

◆ The weight pan features an independent rotary design, minimizing the impact of its inertia on the test load during operation.

Technical Specifications:

Parameter item	Specific value / Description
Radius of gyration	R=5.25mm
Circle length	75mm
Empty bottle pressure	200g
Mass of the weight	100g, 200g, 500g
Scratch needle	Needle tip diameter: (0.05 ± 0.01) mm; insertion angle: 25°.
Needle rotation speed	Approximately (80–100) rpm
Tested material	120mm×50mm×0.2mm～0.3mm
External dimensions (Length × Width × Height)	400mm×258mm×375mm
Overall machine weight	18KG

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

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Customer Reviews

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

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LBTD 501 Fully Automatic Circular Scanning Tester

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E-mail:lbt@lbt.ltd

Address:Tianjin Jinghai Economic Development Zone

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