1PCS Bearing ‌39581/39520 Tapered Roller Bearings Size 57.1500 * 112.7120 * 30.1620mm

The structure, assembly dimensional accuracy, and rotational accuracy of English tapered roller bearings are different from those of metric bearings. Usually used for imported machinery or industries with special requirements, external dimensions and tolerances are expressed in imperial units, suitable for equipment with imperial (usually in inches) dimensions. For example, UK tapered roller bearings refer to tapered roller bearings with external dimensions measured in inches, originating from the UK and the US. Its structural types also include single row, double row, four row, etc., and its working performance is the same as the corresponding metric tapered roller bearings. British bearings represent the external dimensions and tolerances of bearings in British units and are suitable for equipment with British dimensions. British bearings are suitable for various British sizes of industrial machinery, small rotating machinery, etc. The structure, assembly dimensional accuracy, and rotational accuracy of English tapered roller bearings are different from those of metric bearings. Mainly used in industries with imported machinery or special needs. Correspondingly, the inner and outer rings of metric tapered roller bearings have tapered raceways, with tapered rollers installed between the raceways. If the conical surface extends, it will eventually converge at a point on the bearing shaft. Conical roller bearings are mainly used to withstand combined radial and axial loads, mainly composed of radial loads. The axial bearing capacity of a bearing is determined by the contact angle, and the larger the contact angle, the greater the axial bearing capacity. Conical roller bearing is a separable bearing, with an inner ring composed of rollers and a cage, which can be installed separately from the outer ring. This type of bearing can limit the axial displacement on one side of the shaft or housing, and does not allow the shaft to tilt relative to the housing hole. Under the action of radial load, additional axial force will be generated. Therefore, generally speaking, in the two supports of a bearing, the outer and inner rings of the bearing should be installed relative to each end face. The main uses of this type of bearing are: front and rear wheels of automobiles, transmissions, differentials, small gear shafts, machine tool spindles, construction machinery, large agricultural machinery, railway vehicle gear reducers, and rolling mill roll neck small reducers

• Bearing type: tapered roller bearing Model: 39581/39520 Inner diameter (mm): 57.1500 Outer diameter (mm): 112.7120 Width (mm): 30.1620 Weight (KG): 1.420
• Bearing material:Bearing steel Gcr15 to 52100
• Installation method: Clean the bearings with gasoline or kerosene, dry them before use, and ensure good lubrication. Generally, grease lubrication is used, but oil lubrication can also be chosen. Select lubricating grease with superior properties such as impurity free, antioxidant, rust proof, and extreme pressure, with a filling amount of 30% -60% of the bearing and bearing housing volume
• Installation method: Apply equal pressure on the circumference of the ring end face, press the ring in, and avoid using tools such as pliers to directly strike the bearing end face. When the interference fit is small, a sleeve can be used to press the end face of the bearing ring at room temperature, and the sleeve can be tapped with a hammer to evenly press the ring through the sleeve. When installing in large quantities, hydraulic presses can be used. When pressing in, it should be ensured that the outer ring end face is tightly pressed against the outer shell shoulder end face, and the inner ring end face is tightly pressed against the shaft shoulder end face, with no gaps allowed
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