RCF 4 Rolling Contact Fatigue & Bearing Friction Rig may be used for both endurance testing and precision bearing frictional loss measurement. Two test assemblies are available:
            • combined radial and axial loading
            • bi-directional axial loading
    Load is applied by means of servo controlled pneumatic bellows with force transducer feedback.
    An in-line torque transducer is provided for friction measurement, with a maximum permissible speed of 10,000 rpm.
    Bearing outer race temperatures are measured with thermocouples and a vibration sensor with adjustable level trigger circuit is provided for stopping the machine at the on-set of rolling contact fatigue.
    An integral lubricant service module is fitted as standard incorporating a sump tank with immersion heater, delivery pump, scavenge pump, oil to water heat exchangers for cooling and change-over filters.

    RCF 4/1 Combined radial and axial loading assembly

    The test assembly for combined radial and axial loading uses four identical bearings mounted in a back-to-back configuration. Taper roller, spherical roller, cylindrical roller, angular contact and deep groove ball bearings can be accommodated, with shaft sizes from 40 mm to 65 mm and a maximum bearing outside diameter 140 mm. The maximum axial load is 16 kN and the maximum radial load per bearing is 40 kN.

    RCF 4/2 Bi-directional axial loading assembly

    The test assembly for bi-directional axial loading allows two deep grove ball bearings to be mounted, loaded against each other, with a maximum axial load of +/-4 kN. Shaft sizes from 20 mm to 40 mm and a maximum bearing outside diameter 90 mm can be accommodated. Uni-directional loading of angular contact bearings is also possible.

    Control and Data Acquisition

    The RCF 4 has PC based sequence programmable control and data acquisition. This is provided by an integrated Serial Link Interface Module and COMPEND 2000 software running on a host PC, operating under Windows. Data is stored to hard disc in standard spread sheet compatible file formats (.csv or .tsv).
    Tests are defined by a sequence of steps, each step containing set-point, data recording rates and alarm level information. Set-points may be adjusted by step change or ramp. The test sequence is followed unless interrupted by the operator or an alarm. Set-points may also be adjusted manually using on screen toggles.


  • Technical Specifications

    Motor: 4 kW a.c. vector motor and drive with encoder feedback
    Maximum Motor Speed: 3,000 rpm
    High Speed Drive: Flat belt
    Ratio: 6.7:1
    Low Speed Drive: Timing belt
    Ratio: 1:2 & 2:1
    Maximum Spindle Speed: 10,000 rpm
    Torque Transducer Range: 50 Nm
    Maximum Lubricant Supply Rate: 6.8 l/min
    Maximum Lubricant Supply Temperature: Ambient to 150°C
    Change-over Filters: 3 micron
    Interface: Serial Link Interface Module
    Software: COMPEND 2000
    Controlled Parameters Motor speed
    Applied loads
    Test fluid temperature
    Test duration
    Recorded Parameters Motor speed
    Applied load
    Total bearing friction
    Lubricant inlet temperature
    Bearing outer race temperatures
    Vibration sensor output
    RCF 4/1 Combined Radial and Axial Loading
    Configuration: Four bearing back-to-back
    Bearing Types: Taper, spherical, cylindrical roller, angular contact, deep groove ball
    Shaft Diameters: 40 mm to 65 mm
    Maximum Bearing Outside Diameter: 140 mm
    Maximum Axial Load per Bearing: 16 kN
    Maximum Radial Load per Bearing: 40 kN
    Maximum Axial Load: 16 kN
    Maximum Radial Load: 80 kN
    RCF 4/2 Test Assembly – Bi-directional Axial Loading
    Configuration: Two deep grove ball bearings back-to-back
    Bearing Types: Deep grove and angular contact (uni-directional loading)
    Shaft Diameters: 20 mm to 40 mm
    Maximum Bearing Outside Diameter: 90 mm
    Maximum Axial Load Per Bearing: 4 kN
    Maximum Axial Load: 4 kN
    Electricity: 415 V, three phase, 50/60 Hz, 7.5 kW
    Clean, dry air: 4 cfm at 8 bar (120 psi)
    Mains water and drain: 10 l/min (typical)

  • Applications

    bearing friction
    endurance testing
    rolling contact
    rolling contact fatigue
    white etching cracks

  • Publications

  • User List

    Launched 2018

    Undisclosed Client USA

  • Download the Machine Leaflet