DF Sales&Marketing
Oil Tech Moderator
Sulfur is used in many ep oils and metal-working fluids as an ep additive. The basic way this works is for the sulfur to react at elevated temperatures, such as those experienced by meshing gears to form a sulfide layer. For example, for steel gears, an iron sulfide layer forms on the gear tooth surface. This ductile layer improves sliding contact, preventing scuffing or galling.
There are two types of sulfur compounds used — active and inactive sulfur. The main difference is that for active additives, the sulfur-containing additive reacts with the surface at much lower temperatures, whereas inactive compounds react only at much higher temperatures. While active additives have advantages of greater reactivity and hence May offer better anti-scuff protection, especially at lower temperatures, they are also mildly corrosive, particularly to yellow metals (brass, bronze, etc.), and should be avoided where these alloys are present.
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the “yellow-metal” compatibility of gear oils limits normal gear oil specs to be that of “gl-4” which is recommended for some older and/or european and japanese transmissions to prevent corrosive conditions to occur. However, some “gl-5” gear oils including swepco’s do not contain those highly reactive ep additives, and so consequently, they can also be used in applications requiring the gl-4 rating without any problems regarding corrosiveness and therefore offer the better protection of a gl-5 oil in those areas.
Swepco gear oils are formulated to provide superior performance in a wide range of demanding operating conditions. They provide outstanding wear control, service life, cleanliness, thermal stability and corrosion resistance for most industrial gear boxes, manual transmissions, final drives and take-off units. They contain an advanced additive chemistry including lubium®, swepco’s highly effective anti-wear additive.
Swepco 210 multi-graded gear oil is available from the ihon lubricants web page.
There are two types of sulfur compounds used — active and inactive sulfur. The main difference is that for active additives, the sulfur-containing additive reacts with the surface at much lower temperatures, whereas inactive compounds react only at much higher temperatures. While active additives have advantages of greater reactivity and hence May offer better anti-scuff protection, especially at lower temperatures, they are also mildly corrosive, particularly to yellow metals (brass, bronze, etc.), and should be avoided where these alloys are present.
- - - - - - - - - - - - - - - - - - - - - - - - -
the “yellow-metal” compatibility of gear oils limits normal gear oil specs to be that of “gl-4” which is recommended for some older and/or european and japanese transmissions to prevent corrosive conditions to occur. However, some “gl-5” gear oils including swepco’s do not contain those highly reactive ep additives, and so consequently, they can also be used in applications requiring the gl-4 rating without any problems regarding corrosiveness and therefore offer the better protection of a gl-5 oil in those areas.
Swepco gear oils are formulated to provide superior performance in a wide range of demanding operating conditions. They provide outstanding wear control, service life, cleanliness, thermal stability and corrosion resistance for most industrial gear boxes, manual transmissions, final drives and take-off units. They contain an advanced additive chemistry including lubium®, swepco’s highly effective anti-wear additive.
Swepco 210 multi-graded gear oil is available from the ihon lubricants web page.