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Cement machinery SKF import bearing
Cement machinery SKF import bearing
Sets of FAG bearings
The correct use of FAG bearings

About the characteristics of the internal clearance of NSK bearings

Rolling Mill NSK Bearings Clearance

Rolling mill nsk bearings internal clearance is defined as one NSK bearing collar related to another NSK bearing collar in the radial or axial can move the total interval. About NSK bearing clearance, must distinguish the NSK bearing internal clearance before the device and the NSK bearing internal clearance after the device reached the task temperature. The initial internal clearance  is greater than the task clearance, due to the difference in the level of interference common and NSK bearing ring and related parts of the thermal expansion of the difference will make NSK bearing ring expansion or shortening.

Radial clearance is very important,In order to make rolling mill nsk bearings superior operation, radial clearance is very important. General principle, the ball bearing should always have simply equal to zero task clearance, perhaps slightly pre-loadable. On the other hand, cylindrical, spherical and CARB circular roller bearings in operation should always have some residual clearance – no matter how small. The same applies to tapered roller bearings, except in NSK bearing equipment that requires rigidity, such as pinion NSK bearing equipment, each of which should have a certain amount of preload in the installation.


In these conditions, should be installed after rolling-mill-nsk-bearings clearance of the residual.

  • Whenrolling mill nsk bearings equipment using the recommended public relations common, and in the ordinary normal task premise, choose the common group clearance NSK bearing, you can get the appropriate task clearance.
  • If the operation and installation conditions and normal conditions diverge, for example, two NSK bearing circle are using interference common, often have abnormal temperature, etc., need more or less than the standard internal clearance. In these conditions, should be installed after the NSK bearing clearance of the residual.

Internal clearance of the additional code suffix internal clearance

Rolling mill nsk bearings other than the common group clearance, the general today suffix C1 to C5 to reveal. Internal clearance of the additional code suffix internal clearance

  • C1 smaller than C2
  • C2 smaller than the common group
  • CN common group clearance, where only with other letters, reveal clearance limit reduction or offset
  • C3 larger than the norm
  • C4 greater than C3
  • C5 greater than C4
HM136948 HM136916XD Railroad Bearing

Rolling Mill NSK Bearings Characteristics

  1. roller and raceway for line contact or repair under the line contact, radial bearing capacity, suitable for accepting heavy load and shock load. Friction coefficient is small, suitable for high speed, the limit speed is close to the deep groove ball rolling mill nsk bearings .
  2. can be moved axially, can cope with the thermal expansion or device error caused by the shaft and shell relative position of the transformation, can be used for free end support.
  3.  the shaft or seat hole processing requirements are high, NSK bearing installation after the relative deflection of the outer ring axis should be strictly controlled, so as not to form a contact stress concentration.
  4.  the inner ring or outer ring can be separated, easy to install and disassemble.
  5. Steel plate stamping frame, high-speed NSK bearings or requirements for smooth operation of imported NSK bearings, then use the solid frame. According to the application site and user requirements, can also be designed and supplied with glass fiber reinforced plastic frame.

Rolling mill bearing protection, maintenance and abnormal disposal

  1. in order to be able to work for a long time in superior form to maintain the original function of rolling mill nsk bearings , must be protected, overhaul, in order to prevent chaos before it happens, to ensure the reliability of operation, improve productivity, economy.
  2. the protection of mechanical operating conditions in response to the work specifications, on a regular basis. Contents include watching the running form, add or change the smooth agent, disassembling the reflection on a regular basis.
  3. as the operation of the maintenance matters, there are NSK bearing torsion sound, vibration, temperature, the form of lubricant, etc..
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