Description
Castrol Alpha™ SMR range of open gears are designed for use on heavily loaded open gears and brass journal bearings such as found in the sugar processing, mining, quarrying and rubber industries. Can also be used as a wire rope lubricant.
Application
The combination of additives includes extreme pressure additives to satisfy the vigorous lubrication demands of heavily
loaded mill roll bearings and open gears. Also to protect wire ropes during the extremes of service conditions, in
such applications as the protection of hoist ropes where internal wear and lubricity are of prime concern, to the
severe service conditions of drag ropes where protection from abrasive dirt is the major need.
Also contain emulsifiers to resist the harmful effects of the contamination with sugar juices.
Recommended for use in the following applications:
- sugar mill roll bearing;
- heavily loaded open gears; and
- lubrication and protection of wire ropes.
Advantages
- The products impart high load carrying capabilities thereby reducing wear on contact surfaces.
- The products contain emulsifiers to resist the harmful effects of contamination with sugar juices.
- Protection for wear and corrosion.
- Resists throw-off through excellent adhesive properties.

The most common are as follows:
DIN 51517-2 CL – lubricants have additives that protect from corrosion and oxidation, and are suitable for medium load conditions.
DIN 51517 CGLP – lubricants have additives that protect from corrosion, oxidation and wear in mixed friction locations and additives improving the surface friction characteristics.
DIN 51517-3 CLP – lubricants have additives that protect from corrosion, oxidation and wear in mixed friction locations.
- CLP is typically a CLP mineral oil
- CLP HC is typically a CLP synthetic (SHC, PAO, POE) oil
- CLP PG is typically a CLP polyglycol PAG oil