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Front and rear code of Swedish SKF bearing (2)
Source: Bearing network time: 2013-08-16
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/DB Two pairs of single row deep groove ball bearings; single row angular contact ball bearings or single row tapered roller bearings in pairs with back-to-back method. The number after DB indicates the axial clearance or the preload of the device.
A light preload (angular touch ball bearing).
B Preload is larger than A (angular touch ball bearing).
C preload is larger than B (angular touch ball bearing).
The internal clearance of CA is more than that of the wall.
CB internal clearance is larger than CA (deep groove or angular touch ball bearing).
CC internal clearance is larger than CB (deep groove ball bearing).
CG "zero" clearance (tapered roller bearings).
C... The number behind the special axial internal clearance CC indicates the axial clearance.
GA lighter preload (deep groove ball bearing).
GB preload is greater than CA (deep groove ball bearing).
G... Special preload (the number behind G indicates the preload is large..
/DF Two face-to-face paired single row deep groove ball bearings; single row angular contact ball bearings or single row tapered roller bearings. DF can be followed by the same letter after DB.
/DT Two pairs of deep groove ball bearings placed in series; single row angular contact ball bearings or single row tapered roller bearings.
5) Heat treatment. The inner and outer rings of the bearing are safely disposed of; they can be operated at the following temperatures:
/S0 is up to 150 degrees Celsius.
/S1 up to 200 degrees Celsius.
/S2 up to 250 degrees Celsius.
/S3 up to 300 degrees Celsius.
/S4 up to 350 degrees Celsius.
6) Make up for the smoothing agent.
/W can't make up for smooth oil (no smooth oil groove and oil hole).
/W20 bearing outer ring has three smooth oil holes.
/W33 bearing outer ring has smooth oil groove and three oil holes.
/W33X bearing outer ring has smooth oil groove and six oil holes.
7) Smoothing agent. The post code used to identify the type of smooth grease filled in the bearing consists of a letter group and two numbers; the letters indicate the temperature scale; the latter two numbers indicate the actual smooth grease used; the common letter groups are as follows:
/HT high temperature grease (-20 degrees Celsius ~ +130 degrees Celsius).
/LHT Low/High Temperature Grease (-40 degrees Celsius ~ +140 degrees Celsius).
/LT low temperature grease (-50 degrees Celsius ~ +80 degrees Celsius).
/MT medium temperature grease (-30 degrees Celsius ~ 110 degrees Celsius).
The MT post-code indicates that the specific bearing uses non-standard grease. The amount of smooth grease in the bearing is not the same as the standard filling amount (25%~30% of the free space inside the bearing); it is identified by an additional letter:
A: The amount of smooth grease is less than the standard dosage.
B: The amount of smooth grease is greater than the standard dosage.
C: The amount of smooth fat is greater than B.
8) Other characteristics. The letter V and another letter (such as VA) are combined with three numbers; used to identify variants that cannot be represented by existing other post-codes. For example:
/VA201 kiln car bearing.
/VA301 Cylindrical roller bearings for traction motors.
Article Keywords: SKF Bearing
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