Needle Bearing | Needle Bearing Size Chart

Needle Bearing Size Chart: HK

Drawn cup needle roller bearing(HK Series) is one of the needle roller bearings. It composed of  thin walled punched outer ring, retainer and a group of needle rollers. It is usually formed with thin steel plate through precision punching with very sectional height and big load capacity, so it is suitable for the needed of the low cost and mass produced.

Drawn cup needle roller bearing is used between the needle bearings and the bearing cage, and no axial fixture device is required. Even under the condition of high speed and heavy load, the original function of the bearing can be fully maintained, and not to be easily damaged. Due to the high storage volume of grease, the drawn cup needle roller bearing possibly without lubricating for a long time.

The sealed drawn cup needle roller bearings with sealing lips can normally protect the dirt from entering into the bearing and the lubricant leakage.

Needle Bearing Size Chart: HF

The one-way drawn cup needle clutch bearing(HF Series) is composed of thin wall punched outer ring and plastic retainer. The punched outer ring is made of alloy steel, and there’s the inradius surface which holds the needles tightly. The needle clutch has very small torque due to its thin radical. Each needle is supported by an independent spring, so higher switching frequency and precision are allowed.

    The one-way drawn cup needle clutch bearing is greatly increased after special heat treatment. Metal springs are fitted on the plastic retainer which keeps the correct movement of the needles while the needles are used as clamping unit at the same time.

Through fitting the one-way drawn cup needle roller bearing of the same diameter on the two sides of the drawn cup needle clutch bearing, better supporting rigidity and rotation characteristics are achieved.

    The one-way drawn cup needle clutch bearing assemblely HFL, HFLZ series has a two-in-one supporting bearing which can be a special space-saving support. The support bearings are needles and the plastic retainer, fitted by the two sides of the needle clutch to bear the radical load.

Needle Bearing Size Chart: NK

Entity bushed needle roller bearing(NK Series) is a kind of high capacity bearing with small sectional height. It can operate very flexibly even with the light alloy bearing seat due to its high hard outer ring. There are two series: metric and inch series. Both of which are structured with retainer, full needle and sealing types. Besides, the entity bushed needle roller bearings are divided into two kinds: that with inner ring and without ring. The center shaft is used as rolling body tray for those without inner ring so that its size is even smaller.

The solid ferrule needle roller bearing is compact in structure and small in radial size, and can withstand larger radial loads. In addition to the full complement of needle roller bearings, the other uses of a high-rigidity needle retainer is correctly guides the needle roller parallel to the axis. Accurate machining of the shaft will improve the accuracy of the entire bearing.In general case, the mounting of the needle roller bearings needs compact combination so that the thin wall bush can be well supported. The heavier the load is, the selection combination is bigger, especially when impact load should be considered. Further more, it is necessary to consider the combination of materials and temperature differences.

Entity bushed needle roller bearing and others needle bearings, such as drawn cup needle roller bearings, thrust needle bearings and retainer assembly bearings are suitable for the applications of smaller space and high capacity, widely use in the  automotive parts, the drivetrain system of mechanical engineering, the steering system and the connecting rod.

Needle Bearing Size Chart: AXK

Thrust needle bearing(AXK Series) is composed of tray ring gaskets combined with retainer with needle roller bearings, the stand leads can hold many rolling element, there are very tiny differences among the elements in the same group. The trust needle bearings can support the bearings with the axial directional load and also can be used as the bearings with good rigidity and minimum axial occupied spaces.

The surface of the adjacent parts can be used as a tray for the rolling needles and the holding stand assembly, so the configuration of bearings can be very compacted.

In one assembly, the diameter deviation of the needle roller is very small, so that the thrust needle roller bearing can withstand greater axial load and impact load, and the needle ends are slightly contracted, which can change the line contact between the raceway and the needle roller. The contact can prevent stress peaks and extend the life of thrust needle roller bearings.

If the mounting surface of the thrust needle roller bearing is subjected to the heat treatment and grinding, it can be used as a track surface instead of the track wheel. The thrust needle roller bearing can be miniaturization and more compact, it is suitable for carrying large thrust loads and high impact, loads and high speed operation of industrial applications, and tapered roller bearings and other ball bearings, such as deep groove ball bearings, thin wall ball bearings and miniature ball bearings, they are differ in the shape of the rolling elements.

Needle Bearing Size Chart: KT

KT needle retainer assembly bearing is a kind of independent bearing unit with high load capacity and rigidity especially applicable for the tray of shaft and seat holes with the unit which is limited in radical dimension. Each needle have excellent operative characteristic due to each needle exactly guided and kept by the retainer.

Needle retainer assembly bearing has to bear a large centrifugal force, impact and vibration, working under the complicated load and high-speed rotating condition, there is a large sliding friction between the needle retainer assembly bearing and the rolling element, and a large amount of thermal energy will be generated. In the case of interaction with heat and force, it will lead to the failure of the needle retainer assembly bearing, and also cause the burn and breakage. Therefore, the needle retainer assembly bearing needs to have better thermal conductivity, wear resistance, elasticity, steel and processing technology, smaller coefficient of friction, density, proper strength and toughness fit, and the coefficient of expansion of the rolling elements.

Needle retainer assembly bearing is divided into two series: single row and double row. The main function is to maintain the proper distance between the rolling elements, reduce the friction generated by the contact between the rolling elements, and distribute the rolling elements evenly, so that the load can be evenly distributed, and the rolling elements can be guided in the unloaded area to improve the rolling conditions in the bearing to prevent damaging slippage.

Needle Bearing Size Chart: CF

The bolt roller shaft is generally a full-loaded roller structure, and the bolt shaft raceway portion is quenched. To avoid the stress concentration, the thick wall of the outer ring of the outer surface of the roller is cured. The outer ring has two integral ribs, and the axial direction is guided by rollers. The bolt shaft head and the press-fit side retaining ring provide axial support for the outer ring through rollers.

Bolt roller shaft is suitable for heavier radial loads. Since the outer ring is axially guided by the roller, the bearing can also withstand heavy axial loads, allowing relatively high speed operation. However, since it is a full-loaded roller, it is necessary to replenish the grease frequently, and the lubricant can be filled through the both en ds of the mandrel and the holes in the mandrel body.

Bolted roller shafts and linear bearings have high rigidity, high precision and low friction coefficient for high speeds, and full-roller cam follower bearings are suitable for load applications at low speed or rocking motion. It is widely used in machine tools, industrial manipulators, electronic component devices, and OA equipment. The low coefficient of friction is suitable for high speeds, while the full-roller cam follower bearing is suitable for load applications with low speed or rocking motion.

Needle Bearing Size Chart: LM-UU

The linear bearing passes through the linear motion system and is a linear motion mechanism that rotates by the steel ball. Since the bearing ball is in point contact with the bearing jacket, the steel ball rolls with minimum frictional resistance, the linear bearing has small friction and is relatively stable, and maintains high accuracy, low noise and high rigidity when carrying heavy load.The retainer and the steel ball are inserted into the cylindrical outer cylinder, and the retainer is fixed to the outer cylinder with the retaining buckle at both end ends, and the guiding loop on the retainer enables the steel ball to smoothly circulate and roll to obtain smooth linear motion.

     The linear bearing uses a simple mechanism that effectively uses the space, and is used in conjunction with the circular axis, therefore, the space can be effectively used, and it is suitable for a simple mechanism design.

Linear bearings can be selected according to different environments.

The linear linear bearing is a linear moving element that is rotated by the steel ball, and has a simple structure, that is, a linear motion with low friction. It is widely used in linear motion mechanisms such as semiconductor manufacturing, food machinery, and precision machine tools.