Application of deep groove ball bearings

Application of deep groove ball bearings

Deep groove ball bearings were originally listed as radial ball bearings, which are the most widely used type of rolling bearings. Its characteristics are low frictional resistance, 

high rotational speed, and can be used on components that can withstand radial loads or combined loads of radial and axial forces. It can also be used on components that 

can withstand axial loads, such as low-power motors, car and tractor gearboxes, machine tool gearboxes, general machines, tools, etc.

The basic type of deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls, and a set of retaining structures. There are two types of deep groove ball 

bearings: single row and double row. The deep groove ball structure is also divided into sealed and open types. Open type refers to bearings without a sealed structure, while 

sealed deep groove balls are divided into dust-proof and oil proof seals. The dustproof sealing cover material is stamped steel plate, which only plays a simple role in preven-

ting dust from entering the bearing raceway. The oil proof type is a contact type oil seal, which can effectively prevent the lubricating grease inside the bearing from overf-

lowing.

The type code for single row deep groove ball bearings is 6, and the code for double row deep groove ball bearings is 4. Its structure is simple and easy to use, making it the 

most commonly produced and widely used type of bearing.

Installation method one for deep groove ball bearings: Press fit: The inner ring of the bearing is tightly fitted with the shaft, and when the outer ring is loosely fitted with the 

bearing seat hole, a press machine can be used to press the bearing onto the shaft first, and then the shaft and bearing can be installed into the bearing seat hole together. 

When pressing, a soft metal material assembly sleeve (copper or soft steel) should be placed on the end face of the inner ring of the bearing. The outer ring of the bearing is 

tightly fitted with the bearing seat hole. When the inner ring is loosely fitted with the shaft, the bearing can be pressed into the bearing seat hole first. At this time, the outer 

diameter of the assembly sleeve should be slightly smaller than the diameter of the seat hole. If the bearing ring is tightly fitted with the shaft and the seat hole, both the 

inner ring and the outer ring of the installation chamber should be pressed into the shaft and the seat hole simultaneously The structure of the assembly sleeve should be 

able to simultaneously press the end faces of the inner and outer rings of the bearing.

Installation method 2 for deep groove ball bearings: Heating fit: By heating the bearing or bearing seat, the tight fit is transformed into a loose fit through thermal expansion. 

It is a commonly used and labor-saving installation method. This method is suitable for the installation of bearings with large interference. Before hot fitting, place the bearing 

or separable bearing ring in the oil tank and heat it evenly at 80-100 ℃. Then remove it from the oil and install it on the shaft as soon as possible. To prevent the inner ring end 

face from not fitting tightly with the shaft shoulder after cooling, the bearing can be tightened axially after cooling. When the outer ring of the bearing is tightly fitted with a 

light metal bearing seat, the hot fitting method of heating the bearing seat can be used to avoid scratches on the fitting surface. When heating bearings with an oil tank, there 

should be a mesh grid at a certain distance from the bottom of the tank, or the bearing should be hung with a hook. The bearing cannot be placed on the bottom of the tank 

to prevent impurities from entering the bearing or uneven heating. There must be a thermometer in the oil tank, and the oil temperature must be strictly controlled not to 

exceed 100 ℃ to prevent tempering effect and reduce the hardness of the ring.