 |
||||||||||||||||||||
|
||||||||||||||||||||
 |
||||||||||||||||||||
|
Viscosity
Measurements Table of Contents Physical & Chemical Properties Viscosity is measured by ASTM method D 445 using a common cross arm viscometer. The sample is introduced into a "U" shaped, calibrated, glass tube, submerged in a constant temperature bath. The oil is warmed to the desired temperature (usually 40 degree C for industrial oils) and allowed to flow via gravity down the tube and up the opposite side. The number of seconds the oil takes to flow through the calibrated region is measured. The oil's viscosity in cSt is the flow time in seconds multiplied by the apparatus constant. Viscosity is also measured in the Brookfield viscometer by measuring the resistance to rotation of a spindle in a container of oil at a specified temperature. Brookfield viscosity is useful for low temperature measurements. For example, a gear oil for arctic use is 120,000 cP at -40 degree C. (See Reference 6 for details of viscosity temperature relations). For more information call 1-888-HERGUTH (437-4884) |
|||||||||||||||||||
 |
| NEWS AND EVENTS |
| INVESTIGATE FURTHER |
| Case
Studies White Papers Example Reports Glossary |
| FORMS |
| Client Forms Equipment Forms Sample Forms |
 |
 |