Twin Specialties Corp
Twin Specialties Corp.
1730 Walton Road, Suite 207
Blue Bell, PA 19422
Ph : 610.834.7900
Fax : 610.834.7903
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Castrol Molub-Alloy™ OG 936 SF Heavy (previously called Molub-Alloy 936 SF Heavy) is an open gear lubricant developed specifically for use on heavy duty equipment in mining and industrial service. Molub-Alloy OG 936 SF Heavy is compounded to give maximum protection to gears and slides on large draglines and shovels while minimising potential pollutants to the environment.

A proprietary blend of Molub-Alloy lubricating solids is included to promote anti-wear and load carrying properties. These lubricating solids work synergistically with chemical anti-wear and Extreme Pressure (EP) additives to reduce contact temperatures while providing excellent anti-weld protection under extreme pressure and shock loading.

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 therefore minimise 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 OG 936 SF Heavy is compounded to flow readily in the film-forming process; yet it resists "squeeze-out" and clings tenaciously even to gear teeth in vertical orientation. Rust and oxidation inhibitors are included in the formulation to protect the equipment and the lubricating film against the elements in severe climates.
Unit of Measure

Specifications

Package Type

 N/A Keg

Weight

 N/A 120 lb

Specific Gravity

 N/A 0.950

National Lubricating Grease Institute (NLGI) Consistency

 N/A #0

Viscosity at 40ºC

 N/A 2030 cSt

Viscosity at 100ºC

 N/A 47 cSt

Penetration at 10mm and 77ºF (25ºC) (Worked 60 Strokes)

 N/A 345 to 360

Brookfield Viscosity at 25ºC, Spindle No. 7, 10 rpm

 N/A 144000 cP

Four Ball Extreme Pressure (EP) Weld Point Load

 N/A 800 kg

Four Ball Load Wear Index

 N/A 130 kgf

Four Ball Wear Scar Diameter

 N/A 0.75 mm

Copper Corrosion

 N/A 1B

Pumpability by Lincoln Ventmeter at -7ºC

 N/A 500 psi

Rust Test

 N/A Pass

Lubricating Solids Particle Size

 N/A 15 (Nominal) µm45 (Maximum) µm

Applications

Applications

 N/A Molub-Alloy OG 936 SF Heavy is suitable for use on all types of open gears, racks and pinions and sliding or skidding applications such as draglines and shovels. It can be applied either manually or by heavy duty automatic systems.

This product is used extensively in mining, construction, onshore drilling operations and on offshore installations, facilitating effective lubrication and protection on: 
  • Rack and pinion jacking mechanisms
  • Cantilever skidding systems
  • Mooring winch open gearing and slides
  • FPSO offloading systems
  • Crane slew ring & pinion
  • Exposed threads on penstock valves
  • Heavy duty top dressing for the ultimate protection of wire ropes
Molub-Alloy OG 936 SF Heavy complies with the Bucyrus International SD 4713 specification (CAT) and Komatsu specifications for Open Gear Lubricants.

Features and Benefits

Features and Benefits

 N/A
  • Formulated to address environmental concerns - it is free of solvents, lead, antimony and Barium
  • Forms a tough durable film with a "cushioning" effect, even under extreme pressures and at very slow speeds
  • The film resists erosion from rain or sleet, and resists peeling in dusty environments
  • The film resists destruction by contaminating oils and greases migrating from nearby mechanisms

Claims

Claims (Meets Requirements)

 N/A Bucyrus SD 4713 Komatsu Open Gear Lubricants

Additional Information

Additional Information

 N/A Molub-Alloy OG 936 SF Heavy is not intended for general use in bushings and bearings except in slow moving, heavily loaded applications. Please contact your Castrol Technical Services team to discuss new applications of OG 936 SF in bearings.