Which Grease Is Used for Bearings and Chains?

Bearing grease selection

A common general bearing application may specify an NLGI 2 lithium or lithium complex grease, but that is only a starting point. High speed electric motors may require lower base oil viscosity and careful quantity control. Slow, heavily loaded bearings may need higher viscosity and EP performance. Wet or corrosive environments can require improved water resistance and rust protection.

Application	Important grease property	Main risk
High speed bearing	Suitable base oil viscosity and consistency	Churning and heat from grease that is too heavy
Heavy load or shock	EP and antiwear performance	Film failure and wear
High temperature	Oxidation stability and thermal performance	Hardening, oil loss or shortened life
Wet environment	Water resistance and corrosion protection	Washout and rust
Electric motor	Speed suitability, stability and controlled quantity	Overgreasing and excess temperature

Chain lubrication is different

Chains need lubricant to reach the pin and bush contact where wear occurs. A product that stays only on the outer plates may provide poor internal protection. Depending on speed, temperature and contamination, the correct choice may be a chain oil, tacky penetrating lubricant, aerosol product or specialist high temperature chain lubricant. Heavy grease can trap abrasive dust or fail to penetrate where it is needed.

For wire ropes and exposed cables, use a product formulated for penetration, adhesion, water resistance and corrosion control. Wire rope grease is not a universal substitute for a chain lubricant, but it illustrates why open component lubrication needs properties beyond a standard bearing grease.

How much grease should be applied?

More grease does not always mean better protection. Overgreasing a bearing can cause churning, heat, seal damage and energy loss. Under lubrication can allow film failure, wear and corrosion. Use the manufacturer’s fill quantity and relubrication interval, then adjust only through a controlled reliability process based on speed, temperature, operating hours and contamination.

Changing from an existing grease

• Identify the grease currently in service.
• Compare thickener, base oil, viscosity, NLGI grade and additives.
• Check supplier compatibility guidance.
• Purge or clean the component where the change procedure requires it.
• Monitor temperature, noise, leakage and condition after conversion.

Read what multipurpose grease is used for and compare different grease types before choosing. Buyers can use the original external Grease Shop Nigeria link or contact Epoxy Oilserv. Both original links are retained.

Information needed for a quotation

• Equipment manufacturer and model
• Bearing or chain type and dimensions
• Speed, load and temperature range
• Water, dust, chemical and washdown exposure
• Current lubricant and relubrication practice
• Quantity, pack size and delivery location

Frequently asked questions

Is EP2 grease suitable for bearings?

It can be suitable where the equipment specification and operating conditions match. EP2 alone does not confirm base oil viscosity, speed or temperature suitability.

Should chains be lubricated with grease?

Some slow open chains use tacky products, but many chains need an oil or penetrating lubricant that reaches pins and bushes. Follow the chain and equipment guidance.

Can bearing grease be mixed with another brand?

Brand difference is not the only issue. Compare the formulation and confirm compatibility before mixing or changing.