What is the specification of bearing?
Important operating specifications to consider when searching for bearings include rated speed, dynamic axial or thrust load, and dynamic radial load. The rated speed for a bearing running with grease lubrication is lower than a bearing with oil lubrication.
What is normal bearing clearance?
As a general rule, a ball bearing should have an almost-zero operational clearance, while needle, spherical, cylindrical and CARB toroidal bearings should always have some residual radial operational clearance. Radial clearance is the play between the ball and raceway perpendicular to the bearing axis.
What do the numbers and letters mean on bearings?
The basic code consists of the bearing series, which indicates the type of bearing, and the bore number, which specifies the bore diameter. The bearing series can be made up of letters and/or numbers that designate the construction, diameter series, and in many cases the width series.
How do you read a bearing specification?
The first digit indicates the width or height series (dimensions B, T or H). The second digit identifies the diameter series (dimension D). The last two digits of the basic designation identify the size code of the bearing bore. The size code multiplied by 5 gives the bore diameter (d) in mm.
What is C1 C2 C3 bearing clearance?
C codes for degree of bearing clearance If a bearing has a C code, it offers extra internal clearance. C1 offers the least extra clearance, C5 offers the most extra clearance. The extra margin C3 offer is considered ‘normal’. Bearings with C3 are in fact the most commonly used.
What does UU mean on a bearing?
I did a bit of looking about too and as previously noted LLU = UU and this normally means that there is a double-lip seal present both sides of the bearing. Enduro bearings (for example) are given the LLU suffix.
How do you calculate bearing size from bearing number?
Note : In case there is no fourth digit, then the 3rd digit indicates the bore size in mm. For example: in case of bearing 636, the bore size of the bearing will be 6mm. Thus, we can identify now that in case of bearing 6305ZZ, the third and fourth digit ’05’ means the bearing’s bore size is 25 mm.
