The QJ309 bearing is an angular contact ball bearing capable of withstanding radial and axial loads, as well as pure axial loads, and can operate at high speeds. Angular Contact Ball Bearings have a higher ball capacity than Deep Groove Ball Bearings, resulting in the largest load capacity among ball bearings, as well as higher rigidity and smoother operation. When installed in pairs with the outer rings facing each other, additional axial forces are avoided, and the shaft or housing is confined within axial clearance in both directions. Radial clearance can be adjusted by the relative displacement of the inner and outer rings.
Its key performance parameters include a basic dynamic load rating (C) of 79 kN, a basic static load rating (C0) of 121 kN, a grease-lubricated limiting speed of 5500 r/min, an oil-lubricated limiting speed of 7400 r/min, and a weight of 1.05 kg. Its basic dimensions are an inner diameter of 45 mm, an outer diameter of 100 mm, and a thickness of 25 mm.
Other mounting dimensions include a point of action (a) of 42 mm, a minimum chamfer (r min.) of 1.5 mm, a minimum shoulder diameter (da min.) of 53.5 mm, and a maximum housing shoulder diameter (Da max.) of 91.5 mm. The weight is approximately 1.05 kg.
The basic rated dynamic load is 79 kN, and the basic rated static load is 121 kN; the limiting speed for grease lubrication is 5,500 r/min, and for oil lubrication it is 7,400 r/min; the weight is 1.05 kg; the point of action is 42.0 mm; the minimum chamfer size is 1.5 mm; and the mounting dimensions are a minimum (da) of 53.5 mm and a maximum (da) of 91.5 mm.
Mainly used in rubber molding machines, machine tools, metallurgical equipment, industrial furnaces, and other industrial fields. Also applicable in welding equipment, chromatography products, transistor components, suction nozzles, rolling mill lathes, lifting equipment, Doppler equipment, pressure regulating valves, textile machinery, garden machinery, and sanitary ware facilities.
