This test method covers determination of the changes in the consistency, as measured by cone penetration, of lubricating greases when worked in the roll stability test apparatus.

Roll Stability Apparatus ASTM D1831

• One-place model with thermostatic cabin
• Temperature controlled by a digital thermoregulator
• 160 rpm speed geared motor
• Stainless steel cylinder containing the test grease
• Fitted with stainless steel roller which rotates within the cylinder
• Base with roller supports allowing the rotation