Grease

8-1 Topic

: Grease

GREASE Semi- solid lubricant consisting of a high viscosity mineral oil and metallic soap with a filler. Soaps are compounds of a metal base--calcium, sodium, aluminium--with fatty acids obtained from animal or vegetable Fillers are lead, zinc, graphite, molybdenum disulphide. Fillers enable grease to withstand shock and heavy loads. Function of grease: (1) Will stay put (2) Will lubricate (3) Will act as a seal (4) Useful for inaccessible parts. Application of grease: Calcium soap greases are water resistant and have a melting point of about 95°C and are suitable for low speeds. Sodium soap greases have a high melting point, about 200°C are suitable for high speeds but emulsify in water. Aluminium soap grease has a high load carrying capacity.

R.B, 22.12.04 L4.DOC Singapore Maritime Academy Singapore Polytechnic