Japanese Tapered roller bearings KOYO bearings 30221 have a variety of designs and sizes to suit a variety of purposes. They can be divided into the following categories: single row tapered roller bearings paired with single row tapered roller bearings double row tapered roller bearings. KOYO tapered roller bearings can be separated, and the components composed of the inner ring, roller, and cage and the outer ring can be installed separately with tapered roller bearings. The corrected contact line at the contact between the roller and the raceway can reduce stress concentration. Tapered roller bearings can withstand large radial loads and axial loads. Since the tapered roller bearing can only transmit one-way axial load, another tapered roller bearing installed symmetrically with it is needed to transmit the axial load in the opposite direction. Tapered roller bearings Japanese KOYO bearings 30221 are the most used single-row tapered roller bearings. In the front wheel hubs of cars, small-sized double-row tapered roller bearings have also been used in recent years. Four-row tapered roller bearings are used in heavy machines such as large cold and hot rolling mills.
KOYO Taper Bearing 30221 Detailed parameters
Main purpose: Tapered roller bearings are mainly subjected to combined radial and axial loads based on the radial direction. The bearing capacity depends on the raceway angle of the outer ring, the greater the angle, the greater the bearing capacity. This type of bearing is a separable bearing, which is divided into single-row, double-row and four-row tapered roller bearings according to the number of rows of rolling elements in the bearing. The clearance of single-row tapered roller bearings needs to be adjusted by the user during installation; the clearances of double-row and four-row tapered roller bearings have been set at the factory according to user requirements and do not require user adjustment.
The tapered roller bearing has a tapered inner ring and an outer ring raceway, and the tapered rollers are arranged between the two. All the projection lines of the cone surface converge at the same point on the bearing axis. This design makes tapered roller bearings particularly suitable for bearing compound (radial and axial) loads. The axial load capacity of the bearing is mostly determined by the contact angle α; the larger the angle α, the higher the axial load capacity. The size of the angle is expressed by the calculation coefficient e; the greater the value, the greater the contact angle, and the greater the applicability of the bearing to bear the axial load.