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Why Does It Matter?
Penetrability of
GREASE
What is NLGI?
Enhanced
Lubrication
Grease with the right penetrability ensures
smooth and consistent lubrication,
reducing friction and wear on mechanical
components.
Protection
Against
Contaminants
Properly penetrating grease forms a
protective barrier, shielding
machinery from dust, dirt, and
moisture, prolonging its lifespan.
Temperature
Stability
Grease that penetrates effectively
maintains its viscosity across a range of
temperatures, vital for equipment
operating in diverse environments.
Improved
Efficiency
NLGI Penetrability
Classification
System
National Lubricating Grease Institute, establishes
standards and guidelines for grease manufacturing
and application. They classify greases based on their
consistency, including the critical penetrability factor,
using a scale from 000 to 6.
The NLGI Classification grades are as follows:
GRADE
NUMBER
NLGI 000
NLGI 00
NLGI 0
NLGI 1
NLGI 2
NLGI 3
NLGI 4
NLGI 5
NLGI 6
CONSISTENCY
Very fluid, almost liquid-like
Soft, semi-fluid
Soft, butter-like
Semi-soft
Normal consistency
Firm
Very firm
Hard
Very hard
PENETRATION
(mm/10)
445-475
400-430
355-385
310-340
265-295
220-250
175-205
130-160
85-115
APPLICATION
Gears, open gears,
grease for grease trans-
missions and cen-
tralised systems
Roller, ball bearing and
plain bearings
Sealing greases,
pipeline sealing,
valve
orapiasia.com

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Why Penetrability Of Grease Matter Infographic.pdf

  • 1. Why Does It Matter? Penetrability of GREASE What is NLGI?
  • 2. Enhanced Lubrication Grease with the right penetrability ensures smooth and consistent lubrication, reducing friction and wear on mechanical components.
  • 3. Protection Against Contaminants Properly penetrating grease forms a protective barrier, shielding machinery from dust, dirt, and moisture, prolonging its lifespan.
  • 4. Temperature Stability Grease that penetrates effectively maintains its viscosity across a range of temperatures, vital for equipment operating in diverse environments.
  • 6. NLGI Penetrability Classification System National Lubricating Grease Institute, establishes standards and guidelines for grease manufacturing and application. They classify greases based on their consistency, including the critical penetrability factor, using a scale from 000 to 6.
  • 7. The NLGI Classification grades are as follows: GRADE NUMBER NLGI 000 NLGI 00 NLGI 0 NLGI 1 NLGI 2 NLGI 3 NLGI 4 NLGI 5 NLGI 6 CONSISTENCY Very fluid, almost liquid-like Soft, semi-fluid Soft, butter-like Semi-soft Normal consistency Firm Very firm Hard Very hard PENETRATION (mm/10) 445-475 400-430 355-385 310-340 265-295 220-250 175-205 130-160 85-115 APPLICATION Gears, open gears, grease for grease trans- missions and cen- tralised systems Roller, ball bearing and plain bearings Sealing greases, pipeline sealing, valve