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In order to solve the mechanical equipment in the high temperature, low speed, heavy load, dust, water shower and shock vibration lubrication, the choice of oil-free self-lubricating FAG bearings. [Details]

Lubricant selection and supply

Author:Liaocheng Zhongrui Bearing Fittings Co., Source:http://www.lqzhongrui.com/ Time:2013-10-18 11:43:34 frequency:

The purpose of adding a lubricant to the bearing, the rotary sliding surface of the bearing surface is formed with a thin film to prevent direct contact of the metal surface, the following effects. 

1. Reduce friction and wear 
2. Exclude heat caused by friction 
3. Extend bearing life 
4. Prevent rust 
5. Prevent foreign matter mixed 
 

Lubricate 

Simple use of lubricant, the simple design of the sealing device, it is widely used in rolling bearings. To base oil types and characteristics, thickening and additives were considered when choosing a lubricant, and ultimately determine the most suitable bearing lubricant used. The consistency of the relationship with the use of a lubricant can refer to Table 1. On the type and characteristics of the lubricant can refer to a comprehensive manual NTN rolling bearings. 

Select the example in Table 1 lubricant viscosity

NLGL
Thick numbers 

JIS(ASTM)
60 mixed consistency 

Use 

0

355 to 385 

With a focus on oil 

1

310 to 340

With a focus on oil 

2

265 to 295

General use, sealing bearing 

3

220 to 250

General use, high temperature 

4

175 to 205

Special Purpose

Grease 
Grease applied to the next higher rotation than the lubricant lubrication and high temperature conditions. Suitable for use grease inside the bearing when the heat required to heat or external bearing given discharge and so on. Rolling bearings lubricated rotary temperature viscosity range to match the needs of Table 2 below. 
Several aspects need to be considered viscosity, viscosity index, acid stability, rust, etc. When selecting Bubble grease. Also, Figure 1 are denoted by the grease viscosity - temperature curve. About rotation temperature, is to select the reference data to match the viscosity of lubricating oil when. 

Table 2 bearing viscosity needed

Bearing form 

Kinematic viscosity mm2 / s 

Ball bearings, cylindrical roller bearings, needle roller bearings

13

Self-aligning roller bearings, tapered roller bearings, needle roller bearings slide 

20

Slide the self-aligning roller bearings 

30

Table 3 pointer lubricant viscosity of the sample selected

Rotation of the bearing temperature 

Dn values 
×104

ISO viscosity grade lubricant (VG) 

Applicable bearings 

Normal load 

Weight or 
Impact load 

-300

Allow rotation speed 

22

32

46

All types 

060

1.5

46

68

100

All types 

1.58

32

46

68

All types 

815

22

32

32

Does not include a sliding ball bearing 
All types 

1550

10

22

32

Single row radial ball bearings, 
Cylindrical roller bearings 

60100

1.5

150

220

All types 

1.58

100

150

All types 

815

68

100

150

Does not include a sliding ball bearing 
All types 

1550

32

68

Single row radial ball bearings, 
Cylindrical roller bearings 

100150

Allow rotation speed 

320

All types 

060

46

68

Self-aligning roller bearings

60100

150

Remarks

1. Lubrication is circulating oil or oil immersion method. 
2 conditions outside the scope described in this table, then please contact NTN. 
Figure lubricating oil viscosity - temperature curve

 

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