Can the radial clearance of the bearing be as small as possible?

601 Published by admin1 May 01,2018

Can the radial clearance of the bearing be as small as possible?

Not all bearings require minimum working clearance. You must choose the proper clearance
according to the conditions. In GB 4604-93, the radial clearance of rolling bearings is divided into five groups of -2 groups, 0 groups, 3 groups, 4 groups and 5 groups. The clearance values are from small to large, and group 0 is the standard clearance. The basic radial clearance group is suitable for general operating conditions, normal temperature, and common interference fit; bearings that work under special conditions such as high temperature, high speed, low noise, low friction, etc. should use large radial clearance; For precision spindles and spindles for machine tools, small radial clearances should be used; for roller bearings, a small amount of working clearance can be maintained. In addition, there is no clearance for a separate bearing; finally, the working clearance after the bearing is installed is smaller than the original clearance before installation, because the bearing is subject to a certain load rotation, as well as the bearing coordination and load generated
Elastic deformation.

radial clearance
After the bearing is installed, check the operation to check whether it is correct. Small machines can be rotated by hand to confirm smooth rotation. The excessive operation caused by foreign matter, flaws, and indentations is a problem in the inspection items. Due to poor installation, the torque generated by improper mounting of the mounting seat is unstable, and the moment due to excessive clearance, installation error, and seal friction is too large.
Wait. If there is no abnormality, you can start power running.
The power operation starts from the no-load low speed and gradually increases to the rated operation of the specified condition. The test items in the test run include abnormal sound,
changes in the temperature of the rolling bearing, leakage or discoloration of the lubricant,
and so on. If the abnormality is found, stop the operation immediately, check the machine, and remove the bearing inspection if necessary.

radial clearance
The bearing temperature can generally be estimated based on the external temperature of the bearing
housing. However, using the oil hole to directly measure the temperature of the bearing outer ring is more accurate. The rolling bearing temperature gradually increases from the start of operation, and the temperature is usually stable after 1 to 2 hours. If the bearing is poorly mounted, the temperature will rise sharply and abnormally high temperatures will occur. The reasons for this are an excessive lubricant, excessive rolling bearing clearance, poor installation, excessive friction in the sealing device, and the like.
The rotation sound of the rolling bearing is checked with a stethoscope, etc., and there are
abnormal metal noises, abnormal sounds, and irregular sounds. This may be due to poor lubrication,
poor shaft or bearing seating accuracy, bearing damage, or intrusion of foreign objects.

How to remove and install radial spherical bearings?

How to remove and install radial spherical bearings? The following information show you the metho...

Do you like ? 1,865

Read more

What is the structure of the slewing plummer blocks?

The slewing plummer blocks is a large and extra large bearing housing that can accept comprehensi...

Do you like ? 1,872

Read more

How to adjust the installation clearance of self roller bearings?

Self roller bearings have double row rollers, the outer ring has one shared spherical raceway, an...

Do you like ? 1,710

Read more

How to choose the suitable ball bearing units from different designs?

According to the different requirements of the bearing and ball bearing units, the classification...

Do you like ? 1,983

Read more

Features of all balls bearings

Common equipment using all balls bearings are: motor shafts, transmission parts for light (civil)...

Do you like ? 1,674

Read more

What is the effect of high temperature on imperial ball bearings?

High temperature impact on imperial ball bearings If the lubrication or installation is not appro...

Do you like ? 1,629

Read more

ZYSL factory making ball bearings with customers’ customized specifications.

ZYSL factory making ball bearings with customers' customized specifications.Our company has more ...

Do you like ? 2,296

Read more

These problems should be noticed on the using of radial thrust bearing.

Radial thrust bearing is divided into thrust ball bearing and thrust roller bearing. Radial thrus...

Do you like ? 1,815

Read more