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How to lubricate gears?

Publié le 2020-06-23

The lubrication of open crane gears, planetary gears, portable tools, gear wheels, drive shaft pinions requires specific greases. Gear teeth must be protected from wear by lubricants resistant to the load and adhesive enough not to be centrifuged.

In the case of closed gears (high speed) of geared motors, the gear oils also dissipate the heat from the contacts. In addition, the composition of the gear oils for gearboxes Molykote™ includes : Pure oils with a very high resistance to oxidation, patented antioxidants with a much longer service life than traditional oils, additives, etc., which are used in the production of gear oils.

phosphorus-based anti-wear agent that is non-corrosive to metals. The result is a low tendency to emulsification, high lubricating film strength and high endurance at high temperatures

SAMARO offers gear oils with different viscosities from 150 cSt to 460 cSt.

References ViscosityViscosity index Pour point / 
Flash point
Features

ISO VG 150

Molykote™ L-1115 FM 134,7 / 17,4 122 -39°C / +224°C Semi-synthetic • NSF-H1
Molykote™ L-2115 162 / 18,2 128 -43°C / +238°C Synthetic
Serenys® Reductal 150 150 / 20 130 -15°C Semi-synthetic • NSF-H1

ISO VG 220

Molykote™ L-1122 FM 197,8 / 24 142 -39°C / 226°C Semi-synthetic • NSF-H1
Serenys® Reductal 220 220 / 24 130 -25°C Semi-synthetic • NSF-H1

ISO VG 320

Molykote™ L-2132

320 / 33 123 -37°C / +227°C Synthetic
Serenys® Reductal 320 320 / 40 130 -25°C Semi-synthetic • NSF-H1

ISO VG 460

Molykote™ L-1146 FM 460 / 39,2 147 -36°C / +285°C Synthetic • NSF-H1
Serenys® Reductal 460 460 / 55 130 -20°C Semi-synthetic • NSF-H1

For grease lubrication of gears (low to moderate speed), load resistance, consistency and adhesion are key properties

References TemperaturesLoadFeaturesProperties

Grease for open gears

Molykote™ Longterm 2 Plus -25°C +110°C up to +130°C peak 3800 N Mineral - Lithium - MoS2 + Solid lubricants - Black - NLGI 2 Extreme pressure - Long-lasting lubrication - Very good adhesion - Corrosion protection
Molykote™ 1122 +10°C +160°C 2600 N Synthetic - Inorganic - Solid lubricants - black - NLGI 2 Highly adherent grease - High pressure - Resistant to water washout - Very good anti-wear protection
Molykote™ 165 LT -25°C +120°C 4400 N PAO - Aluminium Complex - PTFE - White - NLGI 2 NSF-H1 Excellent lubricating properties - Good load bearing capacity - Wide temperature range
Molykote™ G-67 -25°C +120°C 4800 N Silicone (high viscosity = 22500 cSt at 40°C) - PTFE - White - NLGI 1 Low coefficient of friction silicone compound - Compatible with many plastics and rubbers - Wide operating temperature range - Good corrosion resistance - Low coefficient of friction
Molykote™ G-1502 FM -40°C +150°C 4600 N Huile PAO - Thickener aluminium Complex - Solid lubricants - White - NLGI 2-3 - NSF-H1 Extremely adherent synthetic grease - Resistant to washout - Good load bearing capacity - Particularly resistant to centrifugation - Compatible with most plastic and rubber materials
Serenys® Gear Plus v2 -20°C +80°C 3500 N Mineral - Organic - Graphite - Brown - NLGI 2-3 Viscous, highly adhesive and penetrating fluid - Protects surfaces from corrosion. Heavy loads - Good resistance to water washout - (CMF: without methylene chloride)

Grease for semi-enclosed gears

Molykote™ Longterm 00

-40°C +110°C 3400 N Mineral • Lithium • MoS2 • Black • NLGI 00 Extremely adherent grease - High load capacity - Good protection against wear and corrosion

For plastic gears

References TemperaturesLoadFeaturesProperties

Heavy loads applications

Molykote™ YM-103 45°C +120°C up to 150°C peak 4800 N PAO - Lithium - Solid lubricants - Yellow - NLGI 1-2 Very heavy loads - Wide temperature range - Long-lasting lubrication due to low tendency to oxidation - Low starting torque - Excellent water resistance

Applications for métal / plastique

Krytox® GPL 205 -36°C +204°C NC PFPE - PTFE - NSF-H1- Base oil at 40°C (104°F): 160 cSt High temperature grease - Compatible with all plastic and elastomer materials
Molykote™ G-4500 FM -40°C +150°C 3100 N PAO - PTFE - White - NLGI 2 NSF-H1 Excellent lubricant properties - Good load bearing capacity - Wide temperature range
Molykote™ G-807 -40°C +150°C NC Silicone (high viscosity = 22500 cSt to 40°C) - PTFE - Blanche - NLGI 1 Low coefficient of friction silicone compound - Compatible with many plastics and rubbers - Wide range of operating temperatures - Good corrosion resistance - Low coefficient of friction
Molykote™ PG-75 -40°C +130°C 1300 N Semi-synthetic - Lithium - Solid lubricants - Beige - NLGI 2 Metal/plastic combination - Long-lasting lubrication - Good behaviour at low temperatures - Very low coefficient of friction
Molykote™ G-2003 -50°C +150°C 2200 N PAO - Lithium - Solid lubricants - Beige - NLGI 2 Long-lasting grease - Very good behaviour at low temperatures - Good water resistance

Low coefficient of friction

Molykote™ EM 30L

-45°C +150°C 3800 N PAO - Lithium - PTFE - Solid lubricants - White - NLGI 1 Heavy-duty grease - Wide temperature range - Long-lasting lubrication - Low coefficient of friction
Molykote™ EM 50L -40°C +150°C 1400 N PAO - Lithium - White - NLGI 1 Noise reduction - Wide temperature range - Improves adhesion to surfaces
Molykote™ G-1067 -50°C +120°C 1900 N PAO - Solid lubricants - White Maintains a very low friction coefficient even after contamination (dust, sand,...) - Does not stain textiles - Reduces operating noise - Very good lubrication of the POM
Molykote™ PG-54 50°C +180°C 2000 N Silicone - Lithium - White - PTFE - NLGI 2-3 Wide temperature range - Low coefficient of friction - Excellent protection against corrosion and oxidation

Contact plastic/ plastic

Molykote™ PG-65 -55°C +130°C 2100 N PAO - Lithium - Solid lubricants - White - NLGI 2 Compatible with many plastics - Low coefficient of friction - Designed for high speed applications
Molykote™ PG-21 -50°C +190°C 1600 N Silicone - Lithium - White - NLGI 2 Wide temperature range - High resistance to oxidation - High resistance to water - Excellent corrosion protection
Molykote™ G-1057 -50°C +150°C 1400 N PAO - Transparent Reduces oil separation - Reduces contamination and is non-staining on textiles - Reduces operating noise

More informations :

Do you need information about our range of Molykote® lubricants? Contact our technical department on +33 426 680 680 or fill in our contact form.

Download our selection guide dedicated to industrial lubrication and maintenance:


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