{"id":1973,"date":"2026-05-12T05:01:17","date_gmt":"2026-05-12T05:01:17","guid":{"rendered":"https:\/\/rexol.uk\/greases\/?p=1973"},"modified":"2026-05-12T05:02:27","modified_gmt":"2026-05-12T05:02:27","slug":"nlgi-grades-explained-for-industrial-grease-buyers","status":"publish","type":"post","link":"https:\/\/rexol.uk\/greases\/nlgi-grades-explained-for-industrial-grease-buyers\/","title":{"rendered":"NLGI Grades Explained for Industrial Grease Buyers"},"content":{"rendered":"\n

Selecting the right grease is not only about thickener type or base oil viscosity. One of the most misunderstood yet critical specifications in lubrication selection is NLGI grease grades<\/strong>.<\/p>\n\n\n\n

Understanding NLGI grades ensures proper equipment protection, reduced downtime, and longer bearing life for industrial buyers, procurement managers, and technical decision-makers.<\/p>\n\n\n\n

This guide will explain what NLGI grease grade means, why NLGI 2 grease<\/strong> is the most commonly used grade, and how to select the correct consistency for industrial applications.<\/p>\n\n\n\n

What Are NLGI Grease Grades?<\/h2>\n\n\n\n
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NLGI stands for the National Lubricating Grease Institute<\/strong>, the organization that developed the standardized classification system for grease consistency.<\/p>\n\n\n\n

NLGI grease grades measure how firm or soft a grease is<\/strong>, not how thick the base oil is, Unlike oil viscosity (such as ISO VG 220 or 460).<\/p>\n\n\n\n

Consistency is determined by a penetration test, which measures how far a cone sinks into the grease under controlled conditions.<\/p>\n\n\n\n

The result places the grease into a grade ranging from 000 (very fluid)<\/strong> to 6 (very hard)<\/strong>.<\/p>\n<\/div>\n\n\n\n

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\"What<\/figure>\n<\/div>\n<\/div>\n\n\n\n

The Full NLGI Grade Scale<\/strong><\/p>\n\n\n\n

A simplified explanation of common grades used in industry is below:<\/p>\n\n\n\n

NLGI Grade<\/strong><\/td>Consistency<\/strong><\/td>Typical Use<\/strong><\/td><\/tr><\/thead>
000<\/td>Semi-fluid<\/td>Centralized lubrication systems<\/td><\/tr>
00<\/td>Semi-fluid<\/td>Gearboxes<\/td><\/tr>
0<\/td>Very soft<\/td>Cold climate applications<\/td><\/tr>
1<\/td>Soft<\/td>Moderate temperature environments<\/td><\/tr>
2<\/td>Medium<\/td>General industrial & automotive<\/td><\/tr>
3<\/td>Firm<\/td>High temperature \/ sealing effect<\/td><\/tr>
4\u20136<\/td>Very firm<\/td>Specialized industrial uses<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

NLGI 2 grease<\/strong> remains the standard choice for most industrial and fleet applications.<\/p>\n\n\n\n

Why NLGI 2 Grease Is the Industry Standard<\/h2>\n\n\n\n

When industrial buyers are asking for grease without specifying grade, they usually mean NLGI 2 grease<\/strong>.<\/p>\n\n\n\n

Why?<\/p>\n\n\n\n

Because it offers an ideal balance between:<\/p>\n\n\n\n