The TE 33 Engine Tribometer is a two-station, vertical axis, long stroke reciprocating tribometer, which combines the reciprocating drive mechanism from the TE 77 High Frequency Friction Machine with the specimen tooling of the DN 55 High Temperature Dry Sliding & Fretting Test Machine.
    The test assembly is located vertically above the reciprocating drive assembly and comprises two fixed specimen arms supported on flexural pivot bearings, which are in turn mounted on linear flexure assemblies. Motion in a vertical direction is restrained by piezo force transducers. As each arm reacts against its own independent transducer, the friction between the each moving specimen and each fixed specimen is monitored independently. This allows two different material pairs to be tested simultaneously under identical conditions of load and temperature.

    Load is applied to either side of the moving specimens by squeezing the two fixed specimen arms together by means of a servo controlled pneumatic bellows assembly, with force transducer feedback. This arrangement ensures that there is no bending moment acting on the moving specimen carrier.

    Tooling Options

    Various tooling options are available in addition to conventional point, line and area contact configurations. Current options include valve stem and valve guide fixtures, and piston ring against cylinder liner. In this latter configuration, a complete piston ring is loaded against a segment of cylinder liner and means are provided for closing the ring gap and for tilting the ring relative to the liner, thus facilitating conformity and alignment.

    Test Assembly Heating Options

    Various specimen assembly heating arrangements are available, including:

    An electrically heated furnace for tests with standard specimen tooling and valve stem/guide tooling at temperatures up to 1000°C.

    A hot air gun heated enclosure for tests with standard specimen tooling and piston ring/liner tooling and with drip feed lubrication at temperatures up to 250°C.

    A gas fired enclosure for tests with standard specimen tooling and piston ring/liner tooling and with drip feed lubrication at temperatures up to 400°C.

    Control and Data Acquisition

    Control and data acquisition are implemented via host PC running COMPEND 2020 Windows compatible software, in conjunction with a Phoenix Tribology USB micro-controller interface.
    Automatic control is implemented via user programmable test sequences. Manual control is implemented using on screen toggles. Data is stored to hard disc in either .csv or .tsv file formats.


  • Technical Specifications

    Contact Configurations: Point Contact
    Line Contact
    Area Contact
    Optional Configurations: Piston-Ring (complete) on Cylinder Liner
    Valve Stem on Valve Guide
    Load Range: 5 to 1000 N
    Loading Rate: 50 N/s
    Temperature Range:
    Electric Furnace: 1000°C
    Hot Air Gun: 250°C
    Gas Fired: 400°C
    Temperature Sensor: k-type thermocouple
    Frequency Range: 2 to 50 Hz
    Stroke Range: See following tables
    Friction Transducer: Piezo-Electric Type
    Force Range: – 500 to 500 N
    Interface: Phoenix Tribology USB micro-controller interface
    Software: COMPEND 2020
    Motor: 1.1 kW a.c. vector motor with 2048 ppr encoder
    Stroke Range
    Continuously Variable Cam – 0 to 12.5 mm
    Angle – degrees: Minimum – mm Maximum – mm
    0 0 2
    18 1.04 3.04
    36 2.65 4.65
    54 4.25 6.25
    72 5.75 7.75
    90 7.09 9.09
    108 8.24 10.24
    126 9.17 11.17
    144 9.85 11.85
    162 10.26 12.26
    180 10.4 12.4
    Step Variable 0 to 12.5 mm:
    Angle – degrees: Nominal Stroke – mm
    0 0
    18 1.94
    36 3.83
    54 5.63
    72 7.29
    90 8.77
    108 10.03
    126 11.05
    144 11.79
    162 12.25
    180 12.5
    Step Variable 12.5 to 25 mm:
    0 12.5
    18 13.05
    36 14.26
    54 15.97
    72 17.89
    90 19.8
    108 21.54
    126 23
    144 24.09
    162 24.77
    180 25
    Controlled Parameters Frequency
    Test Duration
    Measured Parameters Load
    Friction Coefficient
    Electricity: 220/240 V, single phase, 50/60 Hz, neutral & earth, 4.5 kW
    Clean, dry air: 4 cfm at 8 bar (120 psi)

  • Applications

    bore polish
    boundary lubrication
    cylinder liner materials
    high temperature testing
    oxidative wear
    piston ring materials
    ring and liner
    severe oxidative wear
    valve stem materials

  • User List

    Launched 2011

    Federal Mogul China
    Federal Mogul UK
    Federal Mogul USA

  • Download the Machine Leaflet