Needle roller bearings are generally not suitable for static loads. Such loads may damage the roller elements. This includes slow oscillating applications where the bearings rotate at less than 10 rpm. It is critical to re-examine and determine load and speed requirements before selecting the correct bearing type. This helps in selecting a suitable needle bearing that meets the specific requirements of the system and ensures proper functionality, longevity and efficiency. For example, high-speed applications require needle roller bearings that can handle high rotational speeds without excessive heat generation or wear. Likewise, heavily loaded applications will require larger needle bearings to support the weight without premature failure.

For example, inner diameter: 12 mm; outer diameter: 18 mm; width: 16 mm– Bearing type: HK1216But that’s not all – needle roller bearings also have a suffix indicating the presence of a seal.For example 2RS= 2 rubber seals = double seal

Operating temperature: Operating temperature is the temperature range in which the bearing can be used. In low temperature environments, lubricant viscosity increases, requiring higher minimum loads. The reference speed is the rotational speed at which heat dissipation and heat generation are balanced.

Maximum Speed: This value represents the maximum speed at which a needle roller bearing can operate without generating excessive heat or failing prematurely. – “RPM” represents the maximum speed of the bearing model.

Needle roller bearing dimensions chartin inches

Heavy-duty needle roller bearings with machined rings for higher load-bearing applications. Machined heavy-duty needle roller bearings are bearings with low cross-section height and high load ratings. The outer ring has high rigidity and can be easily used even with light alloy bearing seats. These bearings are available in metric and inch series, both with cage and full complement roller types. Therefore, it is possible to select bearings suitable for use under various conditions such as heavy loads, high-speed or low-speed rotation. There are two main types of heavy-duty needle roller bearings with machined rings – needle roller bearings without inner rings and needle roller bearings with inner rings. The inner ringless type uses the shaft as the raceway surface, so a compact design can be achieved.

Due to its relatively complex structure and high manufacturing process requirements, needle roller bearings have the advantage of high precision. The manufacturing accuracy of needle roller bearings can reach below 0.5μm or even above 0.1μm, and they are widely used in high-speed rotation and precision equipment.

C2 = Clearance smaller than international standardNo mark = standard clearanceC3 = Clearance larger than international standardC4 = gap larger than C3

For the 3D drawing, we prefer to STEP, IGS or X_T format. The maximum supported file size is 10MB, For larger or multiple files please place into one folder and compress into a ZIP or RAR file and sent to info@aubearing.com

Accurate Measurement of Needle Roller Bearings: To measure a needle roller bearing in a good way, you need to determine its width (W), inner diameter (ID), and outer diameter (OD). To get accurate readings, measure OD at the widest point, ID at the narrowest point, and measure W between the two bearing rings. You can do this using vernier calipers or a ruler to ensure accurate measurements. Once you have these measurements, you can search for bearings by size using our bearing search tool.

Bearing Name: This is a unique alphanumeric code or part number that identifies a specific needle bearing model. – Standard size bearings usually use inner diameter (ID), outer diameter (OD) and width (W) to indicate the bearing model.

Needle roller bearings also have the advantage of high-speed operation. Since the design and installation of needle roller bearing rollers have been optimized, the maximum speed of the bearing has reached an extremely high level, making it suitable for high-speed rotation and high-precision equipment.

The maximum supported file size is 10MB, For larger or multiple files please place into one folder and compress into a ZIP or RAR file and sent to info@aubearing.com

Measuring Needle Roller Bearing Sizes: Once you know your load and speed requirements, you need to size your bearings. The quickest way to determine the correct type is to use the reference number. Most needle bearings have these numbers engraved on them, but over time they can become difficult to read or completely erase. In these cases, you will need to measure the bearings yourself to get an accurate fit.

Dimensions: The chart provides needle roller bearing dimensions, including the bearing’s inner diameter (ID), outer diameter (OD), and width or length (W or L). – “dr” represents the inner diameter (ID), “D” represents the outer diameter (OD), and “B(C)” represents the width (W).

Needle roller bearingsizechartpdf

Needle roller bearings are used to support mechanical moving components, bear loads and perform rotation, swing or reciprocating linear motion. Compared with general mechanical parts, needle roller bearings have higher accuracy and reliability indicators. There are many ways to classify needle roller bearings, which can be classified according to the structure type and size. The structure type is based on the direction of load the bearing bears, the shape of the rolling elements, the number of rows of rolling elements in each set of bearings, and whether it can be adjusted during operation. Classification is carried out in several directions such as heart. The size classification is based on the overall size of the bearing.

Needle bearingID ODchart

One-way needle roller bearing is a mechanical element specially used to transmit one-way rotation torque. It allows axial force to be transmitted only in one direction but not in the other direction. One-way needle roller bearings usually consist of outer rings, inner rings, rollers and cages. There is a certain gap between the outer ring and the inner ring, allowing the rollers to roll freely within them. The function of the cage is to maintain the position of the roller and prevent it falling out of the bearing. The working principle of one-way bearings is based on the rolling friction of rollers. When a rotational torque is applied to the outer ring, the rollers are acted upon by force and begin to roll. The rolling of the roller will generate a reaction force, causing the inner ring to also start to rotate. However, when the outer ring stops rotating, the rollers immediately stop rolling and the inner ring also stops rotating. This is because the structure of one-way bearings allows the rollers to only roll in one direction but not in the other.

Metricneedle roller bearing dimensions chart

When a needle roller bearing machine is running, due to its unique rolling friction characteristics, the friction is small, which not only reduces energy consumption, but also reduces heat and noise. Especially during high-speed operation, the low friction characteristics of needle roller bearings are prominent.

Needle Roller Bearing Clearance: Another important suffix to consider is the bearing clearance value. This determines the amount of space between the bearing races and can affect how the bearing performs under certain conditions. This clearance is necessary to accommodate any thermal expansion that may occur during operation and ensures that the bearing operates smoothly and efficiently. For example, if the bearing is likely to get hot, a larger gap may be needed to allow for thermal expansion.

Needle bearingSize Calculator

Needle Roller and cage assemblies are single- or double-row units consisting of a cage or needle rollers contained in the cage. They do not have any bearing rings and are assembled between the shaft and housing. They have a higher load-bearing capacity within a smaller working range. Since their radial cross-section is no larger than the diameter of the needle roller, needle roller and cage assemblies allow the realization of bearing configurations with a very small radial design envelope. They have a very high load carrying capacity, are suitable for high speeds and are easy to install.

Due to their high load-bearing capacity and adaptability, needle roller bearings are widely used in a variety of different types of shaft, housing and seat designs, so they can be found in a variety of machines and equipment. Its characteristics enable it to adapt to different working conditions and application requirements, and can meet the bearing requirements under some special working environments and conditions.

Needle roller bearings also have the advantage of high reliability. When a needle roller bearing fails, it is generally only partially damaged and has little impact on the entire bearing system. At the same time, when the service life is properly maintained, the life of needle roller bearings is also longer.

It is important to select the correct clearance for needle roller bearings based on the application requirements. Too much clearance can cause excessive vibration in a needle bearing, while too little clearance can cause the bearing to overheat and fail prematurely.

Needle Roller Bearing Life: Needle roller bearings are subjected to constant compression forces that will eventually cause spalling no matter how well maintained the bearing is. Bearing life is usually estimated based on the number of revolutions experienced before operation. Before determining the expected service life of a needle roller bearing, its basic load rating must first be calculated.

Drawn cup needle roller bearings are the most common type of needle roller bearings. They have a deep, thin-walled outer ring drawn from sheet metal. The hole is usually open but can also be capped on one side. They are designed to be mounted on a shaft. Experience smoother operation without the need for an inner ring. There are three main types of drawn cup needle roller bearings: drawn cup rings with a cage and an open end, drawn cup rings with a cage and a closed end, and full complement bearings with an open end.

Thrust needle roller bearings are used in applications where axial rather than radial loads are carried. The axis of the roller is perpendicular to the axis of the bearing bore. These types of bearings can accept heavy axial loads and shock loads. This type of bearing takes up no space than a thrust washer if the associated machine parts can serve as raceways. If not, a thrust washer must be installed on the machine.

Needle roller bearings have many advantages such as high load bearing capacity, high precision, high-speed operation, low friction, and high reliability, so they are widely used in modern machinery manufacturing. The advantages of needle roller bearings can not only improve the operating efficiency of equipment, but also reduce failure rates and extend service life.

Needle roller bearing dimensions chartpdf

Additional Specifications: Charts may also include additional specifications such as the weight of the bearing, the type of cage used to hold the needle rollers, and any special features or variations of the bearing model. – Most of the detailed model specifications provided by the Aubearing bearing official website also include weight, chamfer and other information.

All needle bearings require lubrication. Most heavy-duty, machined needle roller bearing raceways may contain annular grooves and lubrication holes in the outer ring to help spread lubricant around the circumference of the bearing. Synthetic oil is most commonly used in high-quality bearings. Mineral oil is suitable for high speed use. Synthetic oil is suitable for medium to high speed. Oil exhibits good lubrication under heavy load/high speed conditions. Silicone oil has good heat resistance and will not corrode rubber, but is suitable for low speeds. Oil can be dripped, centrifuged or impregnated into the bearings.

If you’re still not sure how to choose the right needle roller bearing and choose the perfect bearing type, feel free to consult a bearing expert. A bearing supplier or manufacturer can assist you with your specific requirements. At Aubearing, we are committed to providing the best bearing services. Contact us today to learn about how we can serve your needle roller bearing needs.

Needle roller bearings are composed of an outer cylindrical mating surface, an inner conical mating surface and a needle roller. It has the advantage of high load bearing capacity. Compared with other bearings, needle roller bearings have a longer raceway length and a longer needle roller length, so they can effectively share the load and are not easily deformed. The design structure of needle roller bearings enables them to withstand large radial loads and axial loads, thus having a high load-bearing capacity. Among bearings of the same size, the load-carrying capacity of needle roller bearings is much greater than that of other types of bearings.

Maximum speed: The maximum speed is the highest speed at which the bearing is designed to operate. This is determined by the following factors: the strength of the bearing cage, the quality of lubrication, centrifugal and rotational forces, the precision of bearing manufacturing and the characteristics of the lubricant.

Needle roller bearingsizechartSKF pdf

Needle roller bearings are roller bearings with cylindrical rollers that are both thin and long relative to their diameter. Despite their smaller cross-section, needle roller bearings have a high load-carrying capacity. Needle roller bearings are equipped with thin and long rollers (roller diameter D≤5mm, L/D≥2.5, L is the roller length), so the radial structure is compact, and its inner diameter size and load capacity are the same as other types of bearings. , with the smallest outer diameter, especially suitable for support structures with radial installation dimensions. The surface area of the rollers and the large number of rolling load-bearing elements provide needle roller bearings with excellent load capacity and stiffness. Most radial needle roller bearings are designed to withstand axial forces in excess of 5% of the radial load. All needle bearings require some type of lubricant to help dissipate heat and reduce friction. The amount of friction depends on the load carried, the type and size of the needle bearing, the speed of rotation of the bearing and the properties of the lubricant used. Needle roller bearings, especially those with outer rings made of high-strength steel, also dampen shock and vibration.

Steel is the most commonly used cage material in needle roller bearings. Plastic cages may be used where operating conditions permit. Lubrication and surface treatments can reduce the heat generated by friction. Some drawn cup needle roller bearings are designed without a cage and contain a complete set of needle rollers. Full complement bearings combine maximum load carrying capacity with the low cost of drawn cup bearings. In this design, an inward-turning lip is used to secure the rollers in the bearing rings. Testing determined the following friction coefficient values for cage and full complement roller bearing designs:

Grease is best for medium to high rpm. Generally, lubricated bearings have lower high-speed torque than lubricated bearings, but the opposite is true at lower speeds. These are usually applied via a grease pack, but grease plating can also be used. Silicone grease has good heat resistance and will not corrode rubber, but is best suited for medium to low speed applications.

Rated load: Needle roller bearings have dynamic load ratings and static load ratings. These values represent the maximum load that the bearing can withstand under dynamic or static conditions, respectively. – “Dynamic” means dynamic load rating, “Static” means static load rating.

Needle roller bearings come in many different design types. The needle roller is the load-bearing component of the bearing and is a common component for all needle roller bearing types. These allow the outer and inner rings to rotate almost friction-free. They are most commonly made of steel alloys. Raceways (if present) guide the rollers within the bearing. Although the inner and outer rings are designed to fit tightly, the necessary minimum clearance is required to account for thermal expansion and other differences. These products are typically made from carbon chromium steel or other alloys to increase hardness, fatigue resistance and dimensional stability.The bearing cage separates the rollers to keep the load evenly distributed around the bearing. They also reduce bearing noise, improve rolling conditions and prevent slippage.

The Needle Roller Bearing Size Chart is a reference tool that provides information on needle roller bearing sizes and specifications. Needle roller bearings can handle high radial loads within a certain space and are widely used in various industries.Proper selection is essential to ensure optimal performance and service life of machinery and equipment. To assist in this process, it can serve as a valuable reference tool.Next, we’ll delve into the details of the needle roller bearing size chart, explain its importance and provide important insights to help you make informed decisions when selecting for your specific application.The size table of needle roller bearings usually includes the following information:

Needle roller bearingSizechartmm

The Needle Roller Bearing Size Chart is a comprehensive reference guide that provides important information about the different types and sizes of needle roller bearings. It usually includes key parameters such as bore diameter, outer diameter, width and load-bearing capacity. Dimension charts can also provide additional details such as maximum speeds, tolerance classes, and available variations in cage design and materials. Needle roller bearing size charts accurately identify the appropriate bearing size required for a specific application. By referring to the chart, engineers and technicians can match the required size and load capacity to available needle bearing options.

Choosing the Right Needle Roller Bearing Type: There are many needle roller bearing types to choose. Each type is designed for a specific application, so it’s important to choose the type that suits your needs. Once you have measured your needle bearing, you can use our search to find the corresponding bearing type. This is called a suffix in the bearing reference.

Because needle roller bearings show less wear and fatigue under frictional working conditions, have a solid structure and high precision internal components, their lifespan is much longer than that of ordinary bearings. This long life makes needle roller bearings widely used in some equipment that requires long-term stable operation.

Seals isolate rollers, cages and lubricants from contaminants and moisture in harsh environments. Seals must be able to withstand the oxidation, heat and chemicals to which the bearing may be exposed. Sealed bearings often provide inner ring access holes in the outer ring so the bearing can be relubricated. Seals are very reliable when friction between the seal and the bearing or shaft is kept to a minimum. Additional surface treatment or lubrication can be used to reduce this friction. Bearings with integral seals are limited to relatively low rotational speeds compared to open bearings. Seals are usually made of acrylonitrile-butadiene rubber, polyurethane or fluoroelastomer. Since there is no contact between the components, there is no friction that must be taken into account in the implementation of the seal. Non-contact seals are preferred for high speeds. The most common non-contact seal is the labyrinth seal, and many of these seals are made of steel or other rigid metals.