Double row angular contact ball bearing

Description

The standard series IMCB double row angular contact ball bearings include:
Bearings of 32 A and 33 A series
33 D series bearings:
closed bearing
Open type bearings (with closed type) have grooves on the outer ring side.
52 and 53 series bearings are no longer available and have been replaced by 32 A and 33 A series bearings that are interchangeable in size. The only difference is the size 3200 A, which has a width of 14 mm instead of 14.3 mm.
Bearings with double half inner rings
It can accommodate more steel balls and has a larger contact angle, so the bearing has higher load-bearing capacity, especially axial load-bearing capacity
In the 33D series, it belongs to the separable design, which means that the outer ring component with steel balls and retainers can be independently installed from the double half inner ring
It belongs to the inseparable design in the 33 DNRCBM series
A stop ring is installed in the stop groove of the outer ring, making axial positioning in the bearing seat both simple and space saving.
It is specifically designed for centrifugal pumps, but is also suitable for other applications
closed bearing
IMCB offers the most commonly used basic model bearings with sealed or dust-proof covers on both sides, as well as IMCB Explorer bearings. For more information, please refer to the built-in seal.
dust cover
Represented by model suffix 2Z
Made of stamped steel
Extend into the groove on the inner ring
Contact seal
Represented by the suffix 2RS1
Made of nitrile rubber
Reinforced with steel frame
Installed in the groove on the outer ring and in direct and tight contact with the groove on the inner ring
The sealing lip applies slight pressure to the inner groove to form an effective seal.
When closed bearings must operate under extreme conditions such as extremely high speeds or temperatures, grease leakage may occur between the inner ring and seal. If the leakage will have adverse effects on the bearing configuration, corresponding measures must be taken
Lubricating grease for closed bearings
The bearings sealed on both sides adopt lifelong lubrication, which can achieve maintenance free. The closed bearing is pre filled with the following type of grease :

Standard lubricating grease → GJN
In Europe → MT33 (commonly used and widely available)
Low friction grease → GE2
Other lubricating greases can be provided upon request
Standard lubricating grease will not be labeled in the bearing model (without suffix). Other lubricating greases are indicated by their corresponding grease suffixes.
Lubricating grease life of closed bearings
Represented by L10, at the end of this time period, 90% of the bearings can still receive reliable lubrication
Depending on:
operation temperature
Speed coefficient ndmm value
The coefficient of performance (GPF) of lubricating grease is shown in Table 1
The above-mentioned grease life is applicable under the following working conditions:
horizontal axis
Inner circle rotation
Light load (P ≤ 0.05 C)
The working temperature is within the green temperature range of the grease traffic light concept Table 1
Non mobile devices
Low vibration level
If the operating conditions are different from the following conditions, the lubricant life obtained from the chart needs to be adjusted:
Vertical axis → 50% of the obtained value
For heavier loads (P>0.05 C) → use the reduction factor in