Rubber rolling abrasion testing measures the wear resistance of vulcanized and thermoplastic rubber materials under rolling contact conditions, delivering essential durability data for tires, conveyor belts, industrial rollers, and footwear. This guide explains the principle of rolling abrasion tests, sample requirements, key test items, recognized standards such as ISO 4649, ASTM D5963, and GB/T 9867, and typical industrial applications.
Technical Overview
Rubber rolling abrasion testing is a laboratory method used to quantify the resistance of rubber materials to material loss caused by repeated rolling contact against a counter-surface. In real service conditions, components such as tire treads, drive rollers, and conveyor belt covers rarely experience pure sliding friction; instead, wear develops under rolling motion combined with micro-slip, shearing, and ploughing at the contact zone. Rolling abrasion tests reproduce this mechanism by pressing a rubber test piece against a standardized abrasive medium under a defined normal load while the contact is maintained in a rolling or rolling-with-slip mode over a specified path length.
During the test, the mass or volume of rubber removed is measured gravimetrically and corrected using material density. The result is typically normalized against a certified reference compound, producing a relative volume loss value or an abrasion resistance index that allows direct comparison between materials. Because abrasion resistance is highly sensitive to compound formulation, filler loading, cure state, and surface hardness, this test is one of the most widely used indicators of rubber durability in quality control, research and development, and product certification by accredited third-party laboratories.
Testing Samples
Vulcanized and Thermoplastic Rubber Compounds
Standard cured sheets or molded discs are the most common sample form. For the rotating cylindrical drum method, cylindrical test pieces of 16 mm diameter with a minimum thickness of 6 mm are required; thinner sheets may be stacked without bonding to reach the required thickness.
Tire Tread Materials
Tread compounds cut from cured tread stock or finished tires are tested to evaluate and compare wear performance, supporting tread design and formulation optimization.
Conveyor Belt Cover Rubber
Cover rubber from textile or steel-cord conveyor belts is tested to predict service life in demanding bulk-handling environments such as mining, cement, and port operations.
Industrial Rubber Rollers and Solid Wheels
Materials used in printing rollers, tension rollers, casters, and solid tires are evaluated because rolling contact is the dominant wear mechanism in these applications.
Footwear Outsoles and Heels
Outsole compounds are tested to verify slip-and-wear durability claims and to comply with footwear performance specifications.
Seals, Gaskets, and Molded Components
Where geometry permits, coupons cut from finished molded parts may be tested to confirm that production materials meet the abrasion requirements defined in drawings or purchase specifications.
Testing Items
The following parameters are typically reported in a rubber rolling abrasion test:
- Abrasion volume loss of the test piece, expressed in mm³
- Relative volume loss normalized to a standard reference compound
- Abrasion resistance index, expressed as a percentage relative to the reference material
- Mass loss of the specimen over the specified abrasion path
- Specific wear rate, calculated as volume loss per unit load and unit sliding distance
- Surface condition assessment after testing, including smearing, cracking, or tearing of the abraded surface
Testing Methods
Rotating Cylindrical Drum Method (ISO 4649 / ASTM D5963 / GB/T 9867)
This is the internationally recognized benchmark method, historically known as the DIN abrasion test based on the former DIN 53516 procedure. A cylindrical test piece is held against a rotating drum of 150 mm diameter covered with a 60-grit abrasive sheet. In Method A, a fixed force of 10 N is applied and the non-rotating specimen traverses the drum along a helical path over a total abrasion path of 40 m. In Method B, the specimen rotates around its own axis during traversal, and the applied force is adjusted to compensate for abrasive sharpness. The abrasive sheet is calibrated using a certified standard rubber, and results are reported as relative volume loss in mm³ or as the abrasion resistance index in percent, where a value above 100 indicates wear resistance superior to the reference compound.
Akron Angle Abrasion Method (GB/T 1689)
The Akron abrader subjects a rubber disc to contact with a rotating abrasive wheel, with the axes of the two wheels set at a defined angle, typically 15 degrees. This angular contact generates controlled slip at the interface, closely simulating the rolling-with-slip wear experienced by tires and drive rollers. The test result is expressed as volume loss over a standard travel distance of 1.61 km, making it well suited for comparing tread-type compounds.
Lambourn Rolling Abrasion Method
Lambourn-type abraders press a rubber test wheel against a rotating abrasive wheel, with the slip ratio controlled by independently adjusting the rotational speeds of the two wheels. Because the slip percentage can be varied precisely, the method is valuable for studying wear behavior as a function of slip severity and is frequently used in tire tread development programs.
Specimen Conditioning and Test Atmosphere
In accordance with ISO 23529, specimens are conditioned in a standard laboratory atmosphere of 23 °C ± 2 °C and 50 % ± 5 % relative humidity for a minimum of 16 hours before testing. Because abrasion generates frictional heat that can accelerate degradation, test procedures include defined pause intervals or drum cooling to limit temperature rise, and the abrasive medium is preconditioned and periodically recalibrated with standard rubber to ensure reproducibility.
Applications
Rubber rolling abrasion testing supports material qualification and product reliability across many industries:
- Tire manufacturing, for tread compound development, wear ranking, and regulatory compliance verification
- Conveyor belting, for selecting cover compounds that withstand continuous rolling contact with conveyed bulk materials
- Industrial rollers and solid wheels, for confirming the durability of printing, laminating, and material-handling rollers
- Footwear production, for validating outsole wear resistance against purchase specifications
- Automotive and machinery components, for evaluating seals, wiper elements, and vibration-damping parts subjected to rolling or oscillating contact
- Quality control and certification, where accredited third-party laboratories perform rolling abrasion tests for incoming material inspection, batch release, and independent product certification
FAQ
What is the difference between the drum abrasion test and a true rolling abrasion test?
The drum method (ISO 4649 / ASTM D5963) measures abrasion under a traversing contact against a rotating abrasive drum and is universally used for compound ranking. Methods such as the Akron (GB/T 1689) and Lambourn tests add controlled slip between rolling surfaces, more closely reproducing the rolling-with-slip wear mechanism seen in tires and rollers. Both approaches are complementary and are often performed together in a full wear characterization program.
How should rolling abrasion results be interpreted?
A lower relative volume loss or a higher abrasion resistance index indicates better wear resistance. An abrasion resistance index above 100 percent means the test material wears more slowly than the certified reference compound. Results should always be compared only within the same standard, abrasive grade, load, and path length, as values from different test configurations are not directly interchangeable.
How much sample material is required?
For the drum method, cylindrical specimens of 16 mm diameter and at least 6 mm thickness are needed, with multiple specimens recommended to obtain a reliable average. The Akron method requires molded rubber discs of the specified wheel dimensions. In both cases, density must be determined or known to convert mass loss into volume loss.
How long does a typical test take?
The abrasion stage itself is short, typically a few minutes per specimen. However, conditioning for at least 16 hours, abrasive sheet calibration, replicate measurements, and density determination mean a complete test report is normally issued within three to seven working days by an accredited laboratory.
Which industries most frequently require rolling abrasion testing?
The tire, conveyor belting, industrial roller, and footwear industries are the primary users of this test, together with automotive suppliers and manufacturers of heavy-duty rubber components who must demonstrate wear performance to customers or certification bodies.