RY65/800B Thrust Angular Contact Ball Bearing
RY65/800B
Bore Diameter:800 mm
Outside Diameter:950 mm
Width:120 mm
Weight:132 kg
The RY65/800B bearing is a Thrust Angular Contact Ball Bearing with an inner diameter of 800 mm , an outer diameter of 950 mm, a width of 120 mm. It typically uses P0,P6,P5 grade precision tolerances and no seal type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
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Detailed description
BND Angular contact thrust ball bearings, RY65/800B single direction, Ry type and angular contact thrust ball
bearings, double direction, 2344 and 2347 types, have a large contact angle, i.e. between 45°
and 60°, which makes them support combined loads and especially very heavy axial or even
pure axial loads.
Suffixes
A, B, C, D -constructive versions for the same bore diameter
P6 -tolerance class with values smaller than normal
SP -special tolerance class
V -bearing without cage
single direction
Angular contact thrust ball bearings, single direction can take over particulary single direction
axial loads. They can also take over combined loads, considering the specifications given at
equivalent load calculation. These bearings are dismountable.
double direction
Angular contact thrust ball bearings, double direction are mainly high accuracy thrust
bearings, with low tolerances. They are intended to high accuracy main shafts of machinetools. In this case, angular contact thrust ball bearings, double direction, are mounted close to
cylindrical roller bearings, double row, with tapered bore, NN30K type. These bearings are
dismountable.
Dimensions
The main dimensions of angular contact thrust ball bearings, single direction, are in
accordance with national standar STAS 11950, and those of angular contact thrust ball
bearings, double direction, have the same overall dimensions as cylindrical roller bearings, 3
double row, with tapered bore, NN30K type, excepting the bore diameter of bearings series
2347 wich have larger bores.
Tolerances
The tolerances of angular contact thrust ball bearings, single direction, correspond to those of
angular contact thrust ball bearings, single direction. These bearings are generally
manufactured to the normal tolerance classes P6 and P5.
Angular contact thrust ball bearings, double direction, are generally manufactured to tolerance
classes SP and UP. The outer diameter is manufacturedin such a way that these bearings
mounted in the same fits with the cylindrical roller bearings should ensure a radial clearance.
In this case, angular contact angular contact thrust ball bearings, double direction, will take
over only axial loads.
A stiff guidance of the main shaft of machine-tools in longitudinal direction can be obtained if
the angular contact thrust ball bearings, double direction, are preloaded.
This can be done if a distance ring will be mounted between the two shaft washers.
Contact angle
Angular contact thrust ball bearings, single direction, are manufactured with a contact angle
between 45°and 60°, and angular contact thrust ball bearings, double direction, with a contact
angle of 60°. The angle of 60° ensures proper gudance at high speeds as compared to thrust
ball bearings.
Cages
Angular contact thrust ball bearings, single direction, are fitted with machined steel cages and
angular contact thrust ball bearings, double direction are fitted with machined cages guided on
the distance ring.
For an efficacious lubrication, on the outer surface of the housing washer of angular contact
thrust ball bearing, double direction, a peripheral groove and at last 3 lubrication holes are
provided. Generally, these bearings are lubricated with oil at high speeds, since oil reaches
easly the two rows of balls by means of the lubrication holes and groove.
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