BYK Additives & Instruments

Flexibility Testers

Coating Flexibility Testers

For a coating to perform properly during use, the paint must have the proper amount of flexibility to withstand cracking under stress. A common test is bending a coated panel over a cylindrical or conical shaped bar. A mandrel bender is commonly used to test for paint flexibility. A cupping tester is another coating flexibility tester that slowly pushes a round punch through a coated panel until cracking occurs in the paint film. The degree of bending or deformation of the coated surface is measured to assess the coating flexibility.

Cupping Tester

Cylindrical Mandrel Tester - ISO

Cylindrical Mandrel Tester – ASTM

The BYK-Gardner Cupping Tester is a highly precise instrument to test for elongation and deformation of coatings.
The ISO mandrel offers simple and quick test for the flexibility of coatings.
The ASTM version mandrel has rod diameters commonly used in the Americas.
  • Electro-hydraulic drive for highly reproducible results
  • Can accept large and small metal panels
  • Uniform cupping speed of 0.2 mm/sec.
  • Optional stereo microscope for visual evaluation
  • Rod diameters from 2 to 32 mm
  • Handle design to make it easy to bend the metal panel
  • Product selections are compliant with methods: ISO 1519, DIN 53150
  • Rod diameters from 1/8 to 1.0 inch
  • Economical priced
  • V-shaped cuts to hold the mandrel in place during a test
  • Base is designed to store the rods
  • International Standards
  • ISO
    1520

    Erichsen Cupping
    EC
  • Prices and Products
  • 5400
    Automatic Cupping Tester
  • Comes complete with
  • PF-5400:
    Cupping tester
    Connection cable and plug
    Operating Manual
  • Specifications (PDF)
  • Accessories
  • 5411
    Stereo Microscope, PF-5400
  • International Standards
  • ASTM
    D 522

    DTMS 141a
    Method 2012, Method 6051
    Method 6221, Method 6223

    ISO
    1519
  • Prices and Products
  • 5710
    Cylindrical Mandrel Set, ISO
  • Comes complete with
  • PF-5710:
    Set of 12 SS rods from 2 mm to 32 mm; Frame; Operating instructions

  • Specifications (PDF)
  • International Standards
  • ASTM
    D 522

    DTMS 141a
    Method 2012, Method 6051
    Method 6221, Method 6223
  • Prices and Products
  • 1412
    Cylindrical Mandrel Set, ASTM

  • Comes complete with
  • ISO Version:
    Set of 12 SS rods from 2 mm to 32 mm; Frame; Operating instructions

    US Version:
    Set of 9 SS rods from 1/8 in to 1.0 in, Frame, Operating instructions
  • Specifications (PDF)
  • Conical Mandrel Tester

    The conical mandrel bender is a popular design to test coating flexibility.
    • Precision cut conical mandrel for accurate results
    • Built-in ruler for convenient measurement
    • Special sample holder plate design to prevent panel slippage
    • Economically price
    • Compliant with ASTM and ISO methods
    • Durable design for long term use
  • International Standards
  • ASTM
    D 522, D 1737

    ISO
    6860
  • Prices and Products
  • 5751
    Conical Mandrel Tester
    Net Weight: 4.1 kg (9.0 lbs), Dimensions: 510 x 150 x 180 mm (20 x 6 x 7 in), shipping Weight: 5.5 kg (12.0 lbs)
  • Comes complete with
  • Stainless Steel Conical Mandrel
    Operating instructions
  • Specifications (PDF)