NTN Bearings
NTN BEARING CORPORATION OF AMERICA
Bearing Solutions
The Insert Bearing  

The Insert Bearing

Wide Inner Ring Insert Bearing

Wide Inner Ring
Insert Bearing

 
A separate and distinct component of the ball bearing mounted unit is the insert bearing. This component is a standard 6200 or 6300 series radial ball bearing which has been adapted to fit into the housing. Although it is generally sold assembled within the housing, it may also be purchased as a stand-alone item as a replacement bearing for an NTN bearing unit. It may also be inserted into a customer-supplied housing or into a housing that is an integral component of the application equipment.

Ball Bearing Insert Series

As stated previously, ball bearing inserts are simply modified single row, deep groove (SRDG) radial ball bearings, however they warrant a closer look.

200, X and 300 Series Insert Bearings

200, X and 300 series insert bearings (top to bottom)
for the same size insert series and shaft—the illustration shows the proportional difference in O.D.

 

Insert bearings manufactured by NTN are available as a standard 200 or 300 dimension series, and are available as well as a special X dimension series. The 200 and 300 series inserts have the same number and diameter of balls as their counterpart standard bearings in the 6200 and 6300 SRDG bearing series.

Just as with SRDG ball bearings, the 200 series has a smaller outside diameter and balls, and carries lighter loads than the 300 series.

The X series, however, is a special dimension series that falls between the 200 and 300 series inserts. They are classified as medium-duty.

The 2, 3 and X in the NTN part number will indicate the series. For example, a UC206-104 bearing indicates a 200 series bearing with the same internal specifications as a 6206 radial ball bearing, while a UEL306-103 indicates a 300 series with the same internal specs as a 6306 radial ball bearing.

Note: NTN’s UEL series insert is slightly wider than other inserts due to the use of heavy-duty seals and flingers (more information on seals and flingers follows later in this guide). This variation is present in all 6200/200 and 6300/300 series bearings and inserts.

 

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