Insert ball bearings are mainly used in simple arrangements, e. g. in agricultural machines, conveyer devices, food processing machines, construction machines, etc.
Design specifications
Main dimensions
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.
Lubrication
The insert ball bearings do not require maintenance. The filling of the lubrication is usually sufficient for the whole operation life of the bearing.
Radial clearance
Insert ball bearings have radial clearance C3 in the range valid for the single row ball bearings.
Operation temperature
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 DiameterLimiting rotation speed with plastic lubricant for bearings type UA, UE, UD and UC with shaft diameter tolerance
d h6 h7 h8 h9 h11 mmmin-1
17 9500 6000 4300 1500 950
20 8500 5300 3800 1300 850
25 7000 4500 3200 1000 700
30 6300 4000 2800 900 630
35 5300 3400 2200 750 530
40 4800 3000 1900 670 480
45 4300 2600 1700 600 430
50 4000 2400 1600 560 400
55 3600 2000 1400 500 360
60 3400 1900 1300 480 340
65 3000 1700 1100 430 300
70 2800 1600 1000 400 280
80 2400 1400 900 360 240
90 2000 1200 800 320 200
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
Factors
Fa/Cor e Y
0.025 0.22 2
0.040 0.24 1.8
0.070 0.27 1.6
0.130 0.31 1.4
0.250 0.37 1.2
0.500 0.44 1
Insert ball bearings
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).
Design specification
Application
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.
Main dimensions
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.
Designation
For designation of the housing units and complete insert bearing units see the following table.
