preload preload preload preload

Choice and supplement of lubricant


29th November 2009 Bearing Technology 0 Comments

Give, import bearing, it adds purposes of lubricant to be, rotatory surface and slip surface, form one layer thin oil film in bearing, prevent the direct contact of the metal covering, there are the following results.

Reduce friction and abrade

Get rid of and rub the temperature caused

Lengthen the life-span of the bearing

Prevent getting rusty

The ones that prevent foreign matter are mix withed

Lubricant is lubricated

Lubricant is simple to use, the design of the seal installation is simple and easy, so used in the rolling bearing extensively. Should be to the basic oil while choosing lubricant, it is thick to increase, kind and characteristic of additive,etc. are considered, confirm lubricant suitable for bearing to most use finally. The relation between consistency and use of lubricant can consult Table 1. Comprehensive manual regarding kind and characteristic of lubricant can consult NTN rolling bearing.

Choice example of the viscosity of lubricating oil of Table 1

NLGL
Thick number JISASTM
Mixed consistency 60 times Use

0 355- 385 Centralized and for use in oil 1 310- 340 Centralized and for use in oil 2 265- 295 Generally use, the sealing bearing is used 3 220 – 250 Generally use, the high temperature is used 4 175- 205 Special use

The oil is lubricated

The oil is lubricated and suitable for lubricating under higher rotation and high-temperature condition more than lubricant. Need the heat which entrusts the bearing to heat or outside within the bearing to be suitable for using the oil to lubricate while discharging etc.. The rotatory temperature that the rolling bearing lubricates needs Table 2 Match of the viscosity range illustrated.

It needs to consider the viscosity, viscosity index, acidifying stability when lubricating to choose the oil, antirust, get rid of a plurality of respects such as the bubble. Another, Fig. 1 Have marked the viscosity that the oil lubricated – curve graph of temperature. About rotating the temperature, it is a reference data chosen while matching the lubricating oil of viscosity.

Viscosity that the bearing of Table 2 needs

Bearing form Move and glue degree mm2/s

Ball bearing, drum roll sub bearing, acicular to get away sub bearing 13 Transfer heart, roll sub bearing automatically, taper roll sub bearing, slip needle get away sub bearing 20 Slip, transfer heart get away sub bearing automatically 30

Selected indicator example of the viscosity of lubricating oil of Table 3

Rotatory temperature of the bearing
℃ Dn value
*104 Viscosity grade VG of ISO of the lubricating oil Applicable bearing Ordinary load Shoulder a heavy task or
Impact load

-30- 0 Rotational speed allowed 22 32 46 All kind 0- 60 – 1.5 46 68 100 All kind 1.5- 8 32 46 68 All kind 8- 15 22 32 32 Excluding the one that slip the ball bearing
All kind 15- 50 10 22 32 Uniline radial ball bearing,
Sub bearing of the drum roller 60- 100 – 1.5 150 220 All kind 1.5- 8 100 150 All kind 8- 15 68 100 150 Excluding the one that slip the ball bearing
All kind 15- 50 32 68 Uniline radial ball bearing,
Sub bearing of the drum roller 100- 150 Rotational speed allowed 320 All kind 0- 60 46 68 Transfer heart get away sub bearing automatically 60- 100 150










  • Leave a Reply

    * Required
    ** Your Email is never shared