BSD2047CGB SKF Super Precision Single Direction Angular Contact Thrust Ball Bearing 20x47x15mm
SKF High precision angular contact thrust ball bearings to support precision ball screws. They are especially suitable for high precision machine-tool feeding mechanisms and similar applications. 20mm inside x 47mm outside x 15mm wide medium preload
Regular price
£129.67
inc.VAT
£108.06 exc.VAT
FREE UK MAINLAND DELIVERY ON ORDERS OVER £50
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These bearings are non-separable and have a 62 degree contact angle. The transition radius between the raceway and shoulder on both rings is ground. This reduces edge stresses by approximately 30 percent, enabling these bearings to accommodate heavy axial loads and incidental overloading better than conventional designs. Single direction bearings are designed to accommodate axial loads in one direction only and are therefore adjusted against a second bearing or mounted as sets. The bearings are universally matchable, as standard, and can be mounted in sets of up to four bearings for a variety of bearing arrangements, reaching the performance level of matched sets. A unique heat treatment helps to maintain a constant bearing preload over the entire service life of the bearings.
A V-shaped marking on the outside surface of the outer rings of universally matchable single direction bearings indicates how the bearing set should be mounted in relation to the axial load. The V-shaped marking points toward the side face of the inner ring that can support axial load. For sets of bearings, the large inner ring side face of the outer bearing should support axial load and should be mounted so that the V-shaped marking points in the direction opposite the axial load. In applications where there are axial loads in both directions supported by face-to-face or back-to-back arrangements, the inner ring side face of the outer bearing, to which the majority of the V-shaped markings point to, should support the heavier of the axial loads.
Dimensions
d 20 mm Bore diameter
D 47 mm Outside diameter
H 15 mm Height
d1 29.4 mm Shoulder diameter
d2 34.5 mm Shoulder diameter
D1 34.6 mm Shoulder recess diameter
D2 40.65 mm Shoulder recess diameter
r1,2 min.1 mm Chamfer dimension
a 40 mm Distance to pressure point
Calculation data
Basic dynamic load rating C 22 kN
Basic static load rating C0 49 kN
Fatigue load limit Pu 1.8 kN
Attainable speed for grease lubrication 9 000 r/min
Attainable speed for oil-air lubrication 12 000 r/min
Contact angle 62 degree
Preload 2 960 N
Frictional moment 0.091 Nm
Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) 860 N/ µm
Maximum axial load carrying capacity Fa max.14.5 kN
Reference grease quantity Gref 1.4 cm ³
Mass
Mass bearing 0.13 kg
A V-shaped marking on the outside surface of the outer rings of universally matchable single direction bearings indicates how the bearing set should be mounted in relation to the axial load. The V-shaped marking points toward the side face of the inner ring that can support axial load. For sets of bearings, the large inner ring side face of the outer bearing should support axial load and should be mounted so that the V-shaped marking points in the direction opposite the axial load. In applications where there are axial loads in both directions supported by face-to-face or back-to-back arrangements, the inner ring side face of the outer bearing, to which the majority of the V-shaped markings point to, should support the heavier of the axial loads.
Dimensions
d 20 mm Bore diameter
D 47 mm Outside diameter
H 15 mm Height
d1 29.4 mm Shoulder diameter
d2 34.5 mm Shoulder diameter
D1 34.6 mm Shoulder recess diameter
D2 40.65 mm Shoulder recess diameter
r1,2 min.1 mm Chamfer dimension
a 40 mm Distance to pressure point
Calculation data
Basic dynamic load rating C 22 kN
Basic static load rating C0 49 kN
Fatigue load limit Pu 1.8 kN
Attainable speed for grease lubrication 9 000 r/min
Attainable speed for oil-air lubrication 12 000 r/min
Contact angle 62 degree
Preload 2 960 N
Frictional moment 0.091 Nm
Axial stiffness for preload A (sets of two brgs back-to-back or face-to-face) 860 N/ µm
Maximum axial load carrying capacity Fa max.14.5 kN
Reference grease quantity Gref 1.4 cm ³
Mass
Mass bearing 0.13 kg