Provides an indication of shear stability of lubricating greases by
testing the change in worked penetrations after two hours in the roll
stability tester.
Roll Stability Tester
• Conforms to ASTM D1831 and related specifications
• Single, double and four-unit models
• Microprocessor programmable high accuracy temperature control
• High Temperature model
Roll stability apparatus for shear stability tests on lubricating greases.
Rotates steel test cylinders at 10 or 165rpm in a thermostatically
controlled environment at temperatures of up to 200°F (93.3°C). Drive
system is powered by a rugged ratio motor, and interchangeable drive
chain sprockets are easily accessible for converting unit to either
operating speed. Microprocessor PID control provides quick temperature
stabilization without overshoot and is protected by an over temperature control
circuit that interrupts power should temperature exceed a programmed cut-off
point. Dual LED displays provide actual and setpoint temperature values in
°C/°F format. Communications software (RS232, etc.), ramp-to-set and other
enhanced features are available as extra cost options. Contact your Koehler
representative for information. A balanced cast aluminium fan and 1200W
heater provide efficient, uniform heat distribution. A dial thermometer in
the hinged cover displays chamber temperature. Heaters and drive chain
mechanism are shielded for operator safety. Insulated steel cabinet and
base are finished with a durable polyurethane enamel finish.
High Temperature Model - A high temperature model is also available that
expands the temperature range to 320°F (160°C). Tests can be conducted
using the high temperature model unit for time/temperature specifications
beyond those listed in existing D1831.
Specifications
Conforms to the specifications of:
ASTM D1831, MIL-G-10924SA
Maximum Temperature: 200°F (93°C)
Temperature Control Stability : ±2°F (±1°C)
Electrical Requirements: 115V 60Hz, Single Phase, 10.5A ; 220-240V 50Hz, Single Phase, 5.5A ; 220-240V 60Hz, Single Phase, 5.5A
Included Accessories
Test Cylinders with threaded end caps and O-ring seals Test Rollers, steel, 5kg