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Lubricant test rigs for examining rolling bearings

Test rigs for DIN certification of lubricants

Bearings, in their design as rolling bearings, are classified, in particular, according to their wear and friction behavior. Specifically in complex installation situations – under high loads or with intensive performance requirements – the bearing quality affects reliability and maintenance costs. Lubricants play an important role here, as they have a significant impact on friction and wear. Our FE8 and FE9 lubricant test rigs are testing systems for determining the quality of the lubricants being used.

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Our FE8 and FE9 test rigs make it possible for our customers to test lubricants under usage conditions. Manual, individual testing means that test results can be used to select the optimal application and to specify performance requirements.

FE8 Test rig for measuring oil or lubricant

The FE8 rolling bearing lubricant test rig can be used to test the tribological system for “rolling bearings”. Our test device can be adapted to many different operating and environmental conditions. Thus, it has a wide range of applications, in that lubricants, rolling bearing materials and rolling bearings can be tested under their specific operating conditions.

The test result provided by our FE8 test rigs provides information on:

  • wear and/or erosion
  • frictional torque
  • temperature.
FE8 Test rig for measuring oil or lubricant

The test ends either when the test time has elapsed or if the frictional torque, maximum temperature or noise level of the test bearing is exceeded. Angular contact ball bearings, taper roller bearings or axial bearings can be tested. The lubricants or oils are evaluated according to DIN 51819 at a speed between 7.5 and 6000 revolutions per minute.

FE8 test rigs can be customized to meet the customer’s requirements. They are able to determine which lubricants are best suited to the different usage conditions of the rolling bearings. The measurement results can also be used to further develop the lubricants.

Live testing of bearings on FE9 test devices

Live testing of bearings on FE9 test devices

Our FE9 test rigs are designed for testing the service life of greases in ball bearings. The testing system consists of five identical test devices that can be operated individually. The measurement and evaluation variables used include the bearing temperature, the running time, the change in the frictional torque of the test bearing, the drive power absorbed and the condition of the lubricant.

Test parameters:

  • speed from 3000 to 9000 RPM
  • axial test force of 1.5, 3 or 4.5 kN.

In the event of bearing failure, the drive power of the test bearing is taken into account; the tests comply with DIN 51821.

The relationship between engine power and engine torque is determined by calibrating each individual motor. The frictional torque of the oil-lubricated auxiliary bearing does not change during the running time. The frictional torque of the test bearing can be inferred from the increase in motor power (increase in the power loss of the test bearing). Experience has shown that an increase to twice the stable state of power consumption indicates that the bearing has failed. In addition, the condition and distribution of the lubricant and the functional surfaces of the bearing are examined visually.

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