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Bearing Basics

Lubrication

The main purpose of bearing lubrication is to reduce friction and wear of each element. Lubricants perform this function by separating rolling and sliding surfaces with a very thin film of oil. Bearing performance and service life is largely dependent on the suitability of the lubricating system and lubricant to the application. Functions of lubrication in rolling contact bearings are

(1) Reduction of friction and wear, reduce the running noise.
(2) Removal of friction heat
(3) Prolonged bearing life
(4) Prevention of rust
(5) Prevention of foreign material from entering the bearing

Lubrication method for bearings can be roughly divided into grease and oil lubrication, grease lubrication is the most widely used lubricant for rolling bearings, It is used a bearing that is shields or seals on both sides, or if using an unsealed bearing

Lubricating grease consist of a mineral or synthetic oil with thickener, the thickners are usually metallic soaps, or other additives also be included to enhance certain properties of the grease. When selecting grease, must consider the the consistency, viscosity of the base oil, operating temperature range, compressive load ,speed

Following are common grease type, properties and characteristics

Maker NO. Brand Base oil Soup Temperature range Characteristics
KYODO YUSHI 1 Multemp SRL Polyol ester+ Diester Li -50~+150 Excellent noise suppressant property and extended performance life
2 Multemp SM-B Synthetic hydrocarbon Urea -40~+200 Long service life under high temperature, Excellent low-temperatureperformance, has high-speed operation, low noise property
3 Raremax SUPER N mineral oil+Synthetic hydrocarbon Urea -40~+180 Long service life under high temperature, Excellent low- temperature performance,
low noise property
4 Multemp PS2 Diester+Synthetic hydrocarbon Li -50~+130 Excellent low-temperature performance, has outstanding noise suppressant property
5 Multemp SRH Polyol ester Li -40~+150 Excellent noise suppressant property and extended performance life
6 Multemp SRM Polyol ester Li -50~+150 Low noise long life and low torque resistance to chemical attack 
7 Multemp ET-K Synthetic easter +Polyol ester Aromatic
double urine
-40~+200 Has more extended life under a high operating temperature condition.
KLUBER 8 BQH72-102 ester Urea -40~+180 Long service life under high temperature, Excellent low-temperature performance, has high-speed operation, low noise
property
9 BEP72-82 ester Urea -40~+180 Low noise,Excellent low temperature performance,
10 ASONIC GLY32 ester Li -50~+140 Low noise, long life and low torque
11 ASONIC Q74-73 ester Urea -40~+160 Low noise,long life and low torque
long life and low torque
13 Isoflex TOPAS NB 52 mineral grease +polyesters Barium
complex soap
-50~+120 load bearing,high speed
14 PETAMO GHY133 mineral grease+ Synthetic hydrocarbon Urea -30~+160 Long service life under high
temperature
15 BE 41-542 Mineral grease Li -20~+140 High load bearing,Excellent
Bearing protection
16 BE 31-502 Mineral grease Urea -10~+140 high viscosity and high load
SHELL 17 Alvania 2 Mineral grease Li -25~+120 Long life and high temperature.
18 RLQ #2 Mineral grease Li -20~+120 Long life and high temperature.
19 RL2 Mineral grease Li -20~+120 Long life and high temperature.
20 RL3 Mineral grease Li -30~+120 Long life and high temperature.
EXXON MOBIL 21 Polyrex EM Mineral grease Urea -29~+177 long life
22 Unirex N3 Mineral grease Li -40~+190 long life,resistance to chemical attack waterproof
23 BEACON325 Synthetic grease Li -54~+150 High speed and low noise
24 Unirex N2 Mineral grease Li -40~+190 long life,resistance to chemical attack waterproof
25 Mobil 28 Synthetic hydrocarbon Micro adhesive -60~+177 High temperature stability
Cosmo 26 EMQ2(SBR) Mineral grease Li -30~+130 long life and low noise
27 PNG Mineral grease Li -30~+130 long life and low noise
CHEVRON 28 SRI-2 ISOSYN Mineral grease Urea -30~+150 waterproof
Lubcon 29 N2 ester Urea -40~+180 High temperature and low noise
DUPONT 30 Krytox 240AC Fluorinated grease
(PFPE/PFPAE)
PTFE -34~+288  High temperature stability with good lubricity properties
Jinzhi 31 Hangu 2 Mineral grease Li -20~+120 Low noise
32 HTHS Mineral grease -40~+180 High speed ,low temperature,low torque and low noise

 

 

 

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