Grease testing is primarily performed to support quality assurance and marketing of new grease products. Cone penetration is considered the most important of.
The NLGI consistency number (sometimes called “NLGI grade”) expresses a measure of the Once worked, the grease is placed in a penetration test apparatus. This apparatus consists of a container, a specially-configured cone and a dial.
An American National Standard. Standard Test Methods for. Cone Penetration of Lubricating Grease1. This standard is issued under the fixed designation D 217.
Consistency, penetration, and National Lubricating Grease Institute (NLGI) numbers: The most important feature of a grease is its rigidity or consistency.
5.1 These cone penetration tests not only evaluate the consistency of lubricating greases over the full range of NLGI numbers from 000 to 6, but also evaluate.