VIT-215 Precision DIN Abrasion Testing Machine

Testing Method

Test Method Reference Methods: DIN-53516, GB-9867

Objective: To assess the abrasion resistance of materials like rubber, polyurethane, and plastics.

Applicable Materials: Sole materials including rubber, polyurethane, and plastics.

Test Apparatus:

• DIN Abrasion Tester
  • Holder Movement: 4.2 ± 0.04 mm per rotation
  • Drum Dimensions: Diameter 150 mm, Length 460 mm
  • Rotation Speed: 40 ± 1 rpm
  • Clamp Holder Speed: 1 rpm while the rotary drum spins at 50 rpm
  • Test Angle: 3° (angle between the sample support and vertical plane of the drum)
• Tubular Drill: Diameter 16 ± 0.2 mm
• Electric Drill: Adjustable vertical drill bit
• Standard Rubber Test Piece: Conforming to DIN 53516
• Universal Adhesive: Suitable for bonding rubber and plastic samples
• #60 Sandpaper: Conforming to DIN 53516
• Electronic Balance: Accuracy to 0.0001 g
• Soft Brush
• Shore A Hardness Tester

Sample Preparation

• Cut three test samples from different positions of the material, ensuring a diameter of 16 ± 0.2 mm and thickness of 6.0 – 10 mm.
• Ensure sample faces are parallel and sides are perpendicular to the top and bottom, forming a cylindrical shape.
• If the sample thickness is below 6.0 mm, bond a supplementary rubber piece (65HA hardness) to meet the minimum 6 mm thickness.

Instrument Calibration After every 10 tests, calibrate using a standard rubber sample. Conduct three tests on the standard rubber and determine the average wear (S). The acceptable wear range is 200 ± 20 mg:

• If wear exceeds 220 mg, the sandpaper is too sharp and must be adjusted.
• If wear is below 180 mg, replace the sandpaper.

Test Procedure

1. Measure the material density (Q).
2. Add weights of 250 g and 500 g to the fixed column, ensuring a total column weight of 1 kg (including the sample clamp).
3. Clean the sample with a soft brush and remove any burrs.
4. Weigh the sample (W1) to an accuracy of 0.001 g.
5. Clean the drum’s surface with a soft brush.
6. Secure the sample parallel to the column’s bottom surface and adjust the height by rotating the knob two revolutions, raising the sample 2.0 ± 0.2 mm above the column head.
7. Lower the column head onto the drum’s starting point and start the machine and vacuum system.
8. After the 40 m test cycle completes, remove the sample and clean it.
9. Weigh the sample again (W2) to an accuracy of 0.001 g.

Calculation Formula (W1 – W2) * S0 A = Q * S

Where:

• A: Wear volume (mm³)
• W1: Pre-test weight (mg)
• W2: Post-test weight (mg)
• Q: Sample density (mg/mm³)
• S: Standard rubber wear (mg)
• S0: Standard rubber reference wear (200 mg)

Results Report the average of three test results, converted to millimeters for clarity and consistency.