• Conform to ASTM D1478 and D4693 Tests
• Lowest Operating Temperature of -75ºC
• Temperature Stability of ±0.1ºC
• Models Available as One or Two Test Positions
These cold air chambers and the included bearing test rigs conform to the requirements of ASTM D1478 Low Temperature Torque of Ball Bearing Greases as well as ASTM D4693 Low Temperature Torque of Grease Lubricated Wheel Bearings test methods.
The top-opening, well insulated cold air chamber is mechanically refrigerated by two hermetically sealed, maintenance-free compressors, arranged in a cascade configuration. Air chamber temperature stability of ±0.1°C is maintained by a digital indicating temperature controller. The digital temperature display shows air chamber temperature to 0.1°C resolution. Additional digital temperature displays are provided for measuring test bearing temperature in the case of ASTM D4693.
For both test methods the torque is measured by a strain gauge and is digitally displayed.
Either model can be configured with one or two independently operated electric drive systems (1 rpm) externally mounted on either side of the air chamber. A thermally insulated drive shaft is used to reduce heat gain by the test bearing. A torque safety limit, stops the electric drive motor if the torque exceeds a preset limit thus protecting the test rig and the drive shaft from damage.
ASTM 1478 & D4693
Single conversion kit, from D4693 to D1478 offers addition test flexibility by converting the bearing tester rig from one method to the other.
Same as above but two conversion kits, from D4693 to D1478.
Single conversion kit, from D1478 to D4693 offers addition test flexibility by converting the bearing tester rig from one method to the other.
Same as above but two conversion kits, from D1478 to D4693.
Paperless Videographic Recorder, special 4 channel, high speed 125 ms with flash memory card storage & ethernet. Built into unit. Required access.
Specifications are subject to change without notice.