Insert ball bearings
Insert ball bearings are mainly used in simple arrangements, e. g. in agricultural machines, conveyer devices, food processing machines, construction machines, etc.
The main dimensions of insert ball bearings specified in the dimension tables are in accordance with the international standards ISO 2264 and DIN 626 T1. The dimensions of the rings are in accordance with the international standard ISO 3145.
The insert ball bearings do not require maintenance. The filling of the lubrication is usually sufficient for the whole operation life of the bearing.
Insert ball bearings have radial clearance C3 in the range valid for the single row ball bearings.
Insert ball bearings are filled with high quality plastic lubricant, which is suitable for maximum operation temperature 100°C and minimum temperature -30°C.
Limiting rotation speed
The limiting rotation speed of the insert ball bearings depends mainly on the arrangement on the shaft (see the following table).
Limiting rotation speed for various shaft diameter tolerances
|Bore Diameter||Limiting rotation speed with plastic lubricant for bearings type UA, UE, UD and UC with shaft diameter tolerance|
Radial equivalent dynamic load
Radial equivalent dynamic load is calculated in the same way as for the standard ball bearings:
Pr = Fr
Pr = 0,56.Fr + Y.Fa
for Fa/Fr ≤ e
for Fa/Fr > e
Radial equivalent static load
Radial equivalent static load of insert ball bearings is calculated as follows:
Por = 0,6.Fr + 0,5.Fa
for (Por ≥ Fr)
Insert ball bearing housing units
Insert ball bearing housing units are made of cast iron and have a spherical hollow where the insert ball bearing is located. The bearing type is inserted according to the housing design request (UA, UC, UD, UE). The housing units are supplied as pillow block type (SG design) or flanged type (FG design).
The insert ball bearings with housing units are used mainly in agricultural machines, conveyor systems, food industry machines as insert bearing units. In general, they are used in arrangements, where the insert bearing unit provides an economical solution with simple arrangement design. For the purpose of potential re-lubrication, the housing units are equipped with grease nipple and grease duct leading straight to the bearing. Should the re-lubrication of insert bearing be not required by its operating conditions, the threaded hole can be plugged.
The housing unit main dimensions are in the accordance with standards ISO 3228, the eccentric locking collar dimensions are in accordance with standards ISO 2145.
For designation of the housing units and complete insert bearing units see the following table.