Lithium vs calcium vs lithium-complex grease — which to pick.

The grease in a bearing isn't a single product — it's a chemistry decision. Three thickener families dominate Indian industry: lithium soap, lithium complex, and calcium sulfonate complex. They look identical in a tin. They are not.

What a "thickener" actually does

A grease is roughly 80% base oil, 10–20% thickener, and a few percent of additives. The thickener is a soap or polymer that holds the oil in a sponge-like matrix — releasing it slowly under load. The thickener determines almost everything that matters in service: drop point, water resistance, mechanical stability, and compatibility with other greases.

The three families at a glance

Property	Lithium 12-Hydroxy	Lithium Complex	Calcium Sulfonate Complex
Drop point	180–200°C	260–280°C	300°C+
Max continuous temp	~120°C	~160°C	~180°C
Water resistance	Good	Very good	Excellent
EP (load-carrying)	Needs additive	Good with additive	Inherent
Rust protection	Needs additive	Good	Excellent (inherent)
Mechanical stability	Fair	Good	Excellent
Relative cost	Low	Medium	High

Lithium 12-hydroxystearate — the everyday workhorse

This is the grease 80% of Indian workshops reach for. It's been the multipurpose standard for sixty years for good reason:

• Affordable, easy to source, predictable performance
• Drop point around 190°C — fine for ambient-to-warm operation
• Compatible with most other lithium greases
• Excellent shear stability at moderate temperatures

Use it for: chassis lubrication, low-temperature bearings, general workshop work, agricultural equipment, two-wheeler hubs, mild industrial duty.

Don't use it for: wheel bearings on heavy disc-brake vehicles, steel-mill bearings, anything seeing sustained temperatures above 100°C.

Lithium complex — the modern upgrade

Adding a complexing agent (typically azelaic or sebacic acid) to lithium 12-hydroxy gives you lithium complex grease — same easy handling, much better high-temperature behaviour. The drop point jumps from ~190°C to ~260°C, the continuous-service temperature ceiling rises by ~40°C, and mechanical stability improves.

For most modern automotive and industrial bearings, lithium complex is the right default. It's the best balance of performance, price, and availability in India today.

Use it for: car wheel bearings (especially disc brakes), commercial vehicle bearings, electric motor bearings, conveyor bearings, off-highway equipment, construction.

Calcium sulfonate complex — the heavy-duty specialist

Calcium sulfonate (CSC) grease is engineered for the worst environments — marine, mining, steel mills, paper mills. The thickener itself provides EP protection and rust inhibition without needing the additive pack that lithium greases rely on. Performance is exceptional:

• Drop point above 300°C
• Resists complete water washout — even works as a marine grease
• Inherent extreme-pressure protection (Timken OK loads of 30 kg+)
• Inherent rust and corrosion protection
• Excellent mechanical stability under shock loading

Use it for: marine deck winches, anchor windlasses, steel mill roll bearings, mining crushers, kiln support rollers, anywhere hot + wet + loaded.

Trade-off: typically 1.8–2.5× the cost of lithium complex, and slightly higher pumping pressure in centralised lubrication systems.

The classic mistake: paying premium for CSC grease in an application that would do equally well on lithium complex — or running cheap lithium grease where the application punishes it and the bearings die early.

Compatibility — what mixes, what destroys

Mixing incompatible greases breaks down the thickener network. The grease softens, loses structure, and bleeds oil out — leaving the bearing un-lubricated. A rough compatibility chart:

Mixing →	Lithium	Li Complex	Ca Sulfonate	Polyurea
Lithium	OK	OK	Avoid	Avoid
Li Complex	OK	OK	Avoid	Avoid
Ca Sulfonate	Avoid	Avoid	OK	Avoid
Polyurea	Avoid	Avoid	Avoid	OK

When switching grease types, purge the housing of the old grease (pump until clean grease appears, or hand-pack after cleaning).

Quick decision tree

1. Mostly indoor, ambient temperature, low load → Lithium
2. Automotive, modern bearings, mixed conditions → Lithium complex
3. High heat + water + shock load + critical asset → Calcium sulfonate complex
4. Anything specified by an OEM → follow the OEM spec, don't substitute thickener families

What we manufacture

Manak Petroleum has been formulating greases in India since 1973. The full range covers all three thickener families:

• ZIGMA Multipurpose Lithium NLGI 2 — the everyday workshop grease
• ZIGMA Lithium Complex EP-2 — automotive and industrial general purpose
• EMTEX CSC NLGI 2 / 3 — calcium sulfonate complex for severe service
• EMTEX Red Gel — open-gear gel for mining and steel mill applications

Browse the greases catalogue, see where we supply across Indian industries, or launch a private-label grease range using our ISO 17025:2017 accredited lab.