Dual-Disc/Wheel-on-Wheel Friction and Wear Testing Machine

Introduction

The wheel-on-wheel configuration employs an independently driven dual-disc structure, providing rolling-sliding contact with a wide range of contact pressures.

The roller-on-roller device is widely accepted as a reliable testing machine for FZG tests.

Its modular, multi-contact configuration (such as block/ball-on-ring, conformal contacts) makes it a truly versatile friction and wear testing machine, suitable for evaluating materials and lubricants used in rolling element applications such as bearings, gears, and railway wheels.

Servo-controlled rollers and sliders

Powerful servo-controlled speed and load management

Applications

Screening lubricants (i.e., gear oils) for high-load drivetrains at various slip rates. Investigating the tribological behavior of lubricant and steel interactions up to 120°C.

Studying the role of material structure in their friction and wear performance.

Rolling contact fatigue behavior of materials for bearings and railway wheels.

High-temperature tribology (up to 700°C) for materials used in metal forming.

Multiple Friction Modes

A versatile system capable of altering test configurations from line contact (roller-on-roller) to area (pin-on-roller or block-on-roller) or point (roller-on-ball) contact. In addition to ease of operation, it facilitates high-throughput research.

Speed Control

The speed of each roller is independently controlled by two servo motors. Thus, variable slip ratios (0 - 200%) can be achieved by setting different spindle speeds. The direction of motion can be set to clockwise or counterclockwise to simulate lubricant entrainment and reverse entrainment (starved lubrication) conditions.

Friction Torque and Linear Wear Sensors

Friction torque is generated during the motion of the contacting rollers. The friction torque is captured by a torque sensor. Linear displacement of the rollers due to creep and wear is measured via a Linear Variable Differential Transformer (LVDT) fixed to the top stationary block of the spindle.

Automatic Loading

The dual-disc friction and wear testing machine consists of two parallel spindles, each driven by a variable-speed motor, automatic loading unit, heating unit, friction torque sensor, and linear wear sensor.

The servo-controlled loading system offers a wide range of contact pressures and flexibility with continuous, ramp, and custom loading profiles.

Temperature Measurement and Control

Experiments can be conducted under lubricated or dry conditions. The temperature within the oil cup is controlled by embedded heaters and temperature sensors. Under dry test conditions, a high-temperature module is available as an option to accommodate higher temperatures.

Product Parameters

For more details on dual-disc friction testers, pin-on-disc testers, roller-on-roller friction testers, railway lubricant friction testers, and track friction and wear testers, please call: 4000666226