CASTROL Molub-Alloy 936 SF Medium

Description

Castrol Molub-Alloy 936 SF Medium Open Gear Compound is a uniquely compounded open gear lubricant

developed specifically for use on heavy duty equipment in mining and industrial service. 936 SF Medium is

compounded to give maximum protection to gears and slides on large draglines and shovels while minimizing

potential pollutants to the environment. Molub-Alloy 936 SF Medium is designed to meet the Bucyrus

International SD4713 specification for open gear lubricants.

Molub-Alloy 936 SF Medium is part of Castrol's Eco-Solutions™ product offering. Formulated to address

environmental concerns, Molub-Alloy 936 SF Medium is free of lead, antimony, barium, and chlorinated solvents.

No solvents of any kind are used in 936 SF Medium. The product is available also in grades Light and Heavy.

The structural integrity and strength of the lubricating film is particularly valuable in the critical process of seating

new gears because of the natural occurrence of high spots (asperities) in newly machined surfaces. The

lubricating film must separate the mating surfaces sufficiently to cushion the effect of the impact of asperities, and

thus minimize initial pitting which could lead to progressive and destructive pitting later.

A highly refined, viscous, paraffinic petroleum derivative is the foundation of a blended base fluid with excellent

natural chemical and thermal stability. Molub-Alloy 936 SF Medium is compounded to flow readily in the filmforming process; yet it resists "squeeze-out" and clings tenaciously even to gear teeth in vertical orientation.

A proprietary blend of Castrol Molub-Alloy lubricating solids is included to promote antiwear and load carrying

properties beyond those of conventional lubricants. The select lubricating solids work synergistically with chemical

antiwear and extreme pressure (EP) additives to reduce contact temperatures while providing excellent antiweld

protection under extreme pressure and shock loading.

Rust and oxidation inhibitors are included in the formulation to protect the equipment and the lubricating film

against the elements in severe climate.

Application

Mining applications include all types of open gears, rails and rollers, racks and pinions, dipper sticks and other

slides on shovels and draglines.

Molub-Alloy 936 SF Medium may be applied either manually or by heavy duty automatic systems.

Advantages

• Compounded for the protection of the ecology, the elimination of materials considered to be hazardous.

• Forms tough durable film with "cushioning" effect, even under extreme pressures and at very slow speeds; film

resists erosion from rain or sleet, and resists peeling in dusty environments.

• Resists film destruction by contaminating oils and greases migrating from nearby mechanisms.

Additional Information

Molub-Alloy 936 SF Medium was not intended for general use in bushings and bearings except in slow moving

heavily loaded applications. Contact Castrol Engineering for all new applications of Molub-Alloy 936 SF Medium in

bearings.