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Moly Grease for Heavy Load, Shock Load & Anti-Seize Applications

Morelic moly grease (MoS2 grease) is designed for extreme pressure lubrication where metal-to-metal contact, sliding motion and boundary lubrication require solid film protection.

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Extreme Pressure Protection (EP)
Anti-Galling & Anti-Seize
Shock Load Resistance
Boundary Lubrication Film (MoS2)
moly grease heavy load construction mining equipment lubrication

Where Moly Grease Is Required in Real Equipment Failures

Standard lithium grease washes out or breaks down under extreme pressure. MoS2 is critical when mechanical forces exceed the oil film's capacity.

Metal Seizing in Pins and Bushings

Metal Seizing in Pins & Bushings

Cause:

Slow oscillation under heavy weight squeezes out standard base oils, causing direct metal contact and welding.

MoS2 Solution:

Molybdenum disulfide particles plate the metal surface, creating a sacrificial low-friction solid film that prevents seizing.

Fretting Wear in Oscillating Joints

Fretting Wear in Oscillating Joints

Cause:

Micro-vibrations and short-stroke movements prevent proper hydrodynamic oil film formation, leading to adhesive wear.

MoS2 Solution:

Solid lubricants embed into surface asperities, providing continuous protection even when motion is too slow to draw in oil.

Shock Load Damage in Construction Equipment

Shock Load Damage

Cause:

Sudden, severe impacts in buckets, crushers, or chassis components instantly rupture liquid lubricant films.

MoS2 Solution:

The layered structure of MoS2 slides over itself under pressure, absorbing impact energy and preventing metal gouging.

Sliding Surface Galling

Sliding Surface Galling

Cause:

Linear sliding mechanisms (like boom extensions) wipe away standard grease, leaving tracks exposed to friction welding.

MoS2 Solution:

High-tack moly grease formulations adhere aggressively to sliding ways, leaving a burnished MoS2 layer that resists wiping.

Corrosion in Heavy Machinery Joints

Corrosion in Exposed Joints

Cause:

Water washout, mud, and industrial chemicals strip away protective grease collars on open gearings and pins.

MoS2 Solution:

When formulated with calcium sulfonate thickeners, moly grease provides exceptional water resistance and seals out corrosive elements.

Lubricant Film Breakdown Under Pressure

Film Breakdown Under Pressure

Cause:

Standard EP additives require heat to activate. Slow-moving, high-load applications may not generate enough heat before damage occurs.

MoS2 Solution:

Molybdenum disulfide functions physically, not chemically. It provides immediate boundary lubrication regardless of operating temperature.

How Molybdenum Disulfide Protects Metal Surfaces

Understanding the mechanics of MoS2 is critical for specifying the right grease for heavy-duty applications. It operates fundamentally differently than standard oil-based lubrication.

  • Forms Solid Lubrication Film

    MoS2 particles have a lamellar (layered) crystalline structure. These layers bond strongly to metal but slide easily against each other.

  • Reduces Friction When Oil Fails

    When extreme pressure forces the base oil out of the contact zone, the solid MoS2 film remains, preventing a spike in friction.

  • Supports Shock Conditions

    The physical barrier of molybdenum disulfide absorbs impact energy, preventing micro-welding and surface spalling during sudden loads.

Technical Definition: Moly grease is a lithium or calcium-based extreme pressure grease fortified with molybdenum disulfide (MoS2) that provides solid film lubrication under heavy load and boundary lubrication conditions. It is most effective where lubrication shifts from hydrodynamic to boundary lubrication under heavy load or slow movement.

Microscopic layered MoS2 film forming on metal surfaces

Moly Grease vs Regular EP Grease

Selecting the wrong grease type can lead to premature bearing failure or joint seizing. Understand the functional differences.

Feature Moly Grease (MoS2) Standard EP Grease
Protection Mechanism Solid lubricant film (Physical barrier) Chemical additives (Sulfur/Phosphorus)
Primary Application Heavy load, sliding motion, oscillating joints General industrial load, continuous rotation
Anti-Seize Capability Excellent protection against galling Limited under extreme slow motion
High-Speed Suitability Generally not recommended (solids can cause drag/heat) Suitable for high-speed precision bearings
Important Note: Moly grease is highly effective for boundary lubrication but is not always suitable for high-speed precision bearings where solid particles might disrupt rolling element clearances.

Moly Grease Formulation Options

Morelic provides diverse OEM formulations tailored to specific industrial environments, base oil requirements, and thickener compatibilities.

Lithium Moly EP Grease

Versatile multi-purpose grease for automotive chassis and general industrial sliding components.

  • Load Type: Medium to Heavy
  • Temp Range: Standard Industrial
  • Packaging: Tubes, Pails, Drums
View bearing applications

Calcium Sulfonate Moly

Superior water resistance and inherent rust protection for marine and wet environments.

  • Load Type: Extreme Heavy
  • Environment: High Moisture / Salt
  • Packaging: Cartridges, Pails

Synthetic Moly Grease

PAO or Ester base oils for wide temperature stability and extended lubrication intervals.

  • Load Type: Heavy / Shock
  • Temp Range: Broad Extreme
  • Packaging: Small packs, Bulk
View high-temp options

High Tack Moly Grease

Formulated with polymers to resist fling-off on open gears and vertical sliding ways.

  • Load Type: Sliding / Open
  • Adhesion: Very High
  • Packaging: Cartridges, Pails

Heavy Duty Mining Grease

High percentage MoS2 (3% to 5%+) for draglines, shovels, and highly loaded pins.

  • Load Type: Severe Shock
  • MoS2 Content: High Density
  • Packaging: Drums, Totes

Anti-Seize Assembly Paste

Extremely high solid content for press fits, splines, and long-term static joints.

  • Application: Assembly / Static
  • Temp Range: Ultra High
  • Packaging: Brush Cans, Tubes
View anti-seize pastes

Equipment & Metal Compatibility Guide

Important Note: Check yellow metal (copper, brass, bronze) compatibility before selecting greases with active sulfur EP additives, as they can cause corrosive wear. MoS2 itself is generally inert, but the base grease additive package matters.

Component / Metal Recommended Grease Type Compatibility Notes Risk Factors
Steel / Cast Iron Lithium Moly EP Excellent bonding of MoS2 layers. Minimal risk.
Bronze / Brass Bushings Inactive EP Moly Grease Requires inactive sulfur additives. Active sulfur causes pitting.
High-Speed Bearings Non-Moly EP Synthetic Avoid solid lubricants. Solids alter clearances, cause heat.
Heavy Sliding Pins High Tack 3-5% MoS2 Prevents grease squeeze-out. Dirt accumulation if over-applied.
Open Machinery (Wet) Calcium Sulfonate Moly Resists water washout completely. Hardening if mixed with incompatible grease.

Failure Diagnosis & Technical Solutions

Grease Squeezed Out Under Pressure

Cause: Base oil viscosity too low or lack of solid boundary lubricants.

Solution: Upgrade to 3-5% MoS2 grease with a higher base oil viscosity.

Buyer Data Needed: Operating load (kN) and speed.

Metal Galling on Slides

Cause: Lubricant wiping off during linear motion.

Solution: Apply high-tack moly grease formulated with tackifier polymers.

Buyer Data Needed: Stroke length and frequency.

Noise Increase in Joints

Cause: Intermittent metal-to-metal contact due to shock loads.

Solution: MoS2 solid film absorbs impact and dampens acoustic vibration.

Buyer Data Needed: Joint clearance dimensions.

Rust in Exposed Equipment

Cause: Standard lithium grease washing out in rain or mud.

Solution: Switch to Calcium Sulfonate Moly for superior sealing.

Buyer Data Needed: Environmental exposure conditions.

Breakdown Under Shock Load

Cause: Chemical EP additives cannot react fast enough during sudden impacts.

Solution: Physical barrier of MoS2 provides instantaneous protection.

Buyer Data Needed: Equipment type (crusher, press, etc.).

Wrong Grease Mixing

Cause: Incompatible thickeners (e.g., Lithium complex mixed with Polyurea) causing hardening.

Solution: Purge old grease completely before applying new moly formula.

Buyer Data Needed: Current grease MSDS/TDS.

Packaging & OEM Private Label Solutions

From retail-ready small packs to industrial bulk drums, Morelic provides flexible filling and private label printing for your brand.

30g 50g tubes

10g / 120g Tubes

Syringe kits

15g Syringes

400g cartridges

400g Cartridges

1kg cans

1kg Cans

15kg pails

15kg Pails

170kg drums

170kg Drums

OEM Manufacturing Capabilities

  • Custom formulation filling
  • Silk-screen & sticker labeling
  • Export-compliant carton packaging
  • Automated batch coding
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Industrial Applications

Construction Equipment Lubrication

Construction Equipment

Problem: High shock loads on excavator bucket pins.

Solution: 5% MoS2 EP Grease.

Mining Machinery Lubrication

Mining Machinery

Problem: Extreme pressure on dragline open gears.

Solution: High-Tack Heavy Duty Moly.

Agricultural Equipment Lubrication

Agricultural Equipment

Problem: Dirt and heavy loads on tractor hitches.

Solution: Lithium Complex Moly EP.

Steel Industry Equipment Lubrication

Steel Industry Equipment

Problem: High heat and slow rolling loads.

Solution: Synthetic High-Temp Moly.

Marine Heavy Duty Joints

Marine Heavy Duty Joints

Problem: Saltwater corrosion and heavy crane loads.

Solution: Calcium Sulfonate Moly.

Automotive Chassis and Pins

Automotive Chassis & Pins

Problem: CV joint wear and ball joint fretting.

Solution: Standard Automotive Moly EP.

Morelic damping grease QC testing torque feel oil separation and packaging inspection

Quality Control & Lab Testing

Every batch of Morelic moly grease undergoes rigorous mechanical and chemical testing to ensure extreme pressure performance and consistency.

Testing / Review Items

  • Appearance and color
  • Consistency / penetration
  • Viscosity direction
  • Oil separation
  • 4-Ball Wear & Weld Test
  • Adhesion & Tackiness
  • Load Stability (Timken OK)
  • Corrosion Protection
  • Water Washout Resistance
  • Filling weight & sealing check

Documents & Support

  • MSDS / TDS
  • RoHS / REACH
  • COA if required

Morelic Manufacturing

  • • Founded in Shenzhen in 2009
  • • 8+ senior R&D engineers
  • • Internal QC laboratory
  • • ISO 9001 certified

Frequently Asked Questions

What is moly grease?
Moly grease is a specialized lubricating grease, typically lithium or calcium-based, that is fortified with molybdenum disulfide (MoS2) powder. It is designed to provide boundary lubrication. When extreme pressure forces the base oil out of a contact zone, the MoS2 particles form a solid, low-friction protective film on the metal surfaces, preventing direct metal-to-metal contact and severe wear.
What is MoS2 grease used for?
MoS2 grease is primarily used in slow to medium-speed industrial applications subject to heavy loads, shock loads, and sliding motion. Common uses include excavator pins and bushings, mining draglines, CV joints, open gears, and heavily loaded sliding ways where standard hydrodynamic oil films cannot be maintained due to pressure or slow movement.
Is moly grease good for bearings?
Moly grease is excellent for slow-moving, heavily loaded plain bearings and bushings where sliding friction is prominent. However, it is generally not recommended for high-speed precision roller or ball bearings. The solid MoS2 particles can interfere with the tight clearances of rolling elements at high speeds, potentially causing drag, increased operating temperatures, and premature wear.
What is the difference between EP grease and moly grease?
Standard EP (Extreme Pressure) grease relies on chemical additives (like sulfur-phosphorus) that react with metal surfaces under heat to form a protective layer. Moly grease, while often containing EP additives, relies primarily on the physical, solid barrier of MoS2. MoS2 provides immediate protection against shock loads and sliding friction without requiring heat to activate, making it superior for slow, heavy-load applications.
Can moly grease prevent metal seizing?
Yes, preventing metal seizing and galling is one of the primary functions of moly grease. The molybdenum disulfide layers shear easily against one another while remaining firmly bonded to the metal substrate. This sacrificial solid film ensures that even under extreme compressive forces where oil is absent, the metal asperities do not weld together.
Does Morelic provide OEM moly grease?
Yes, Morelic is an established manufacturer offering OEM and ODM moly grease solutions since 2009. We formulate lithium, calcium sulfonate, and synthetic-based MoS2 greases tailored to specific industrial requirements. We also provide comprehensive private label packaging services, ranging from small 30g tubes to 170kg bulk drums, supported by full MSDS and technical documentation.

Need a Moly Grease Formulation for Your Equipment or Market?

Morelic provides OEM moly grease solutions for heavy load, shock load and anti-seize industrial applications with flexible packaging and technical support.

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+86 195 1520 4360

Factory Address

No. 8, Xintang Village, Longhua District,
Shenzhen, Guangdong, China

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