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Needle Roller Bearing

Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are thin and long. This type of roller is called a needle roller. Despite its small cross-section, the bearing still has a high load-bearing 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. When its inner diameter size and load capacity are the same as those of other types of bearings, the outer diameter is the smallest, which is particularly suitable for support structures with limited radial installation dimensions.

Product details

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Model number Basic size Basic load rating Rated speed
Dynamic state Static Reference speed Limiting speed
d [mm] D [mm] B [mm] C [kN] C₀ [kN] [r/min] [r/min]
NA6905A
 25 42 30
NA6902A
 15 28 23
NA6901A
 12 24 22
NA6900A
 10 22 22
NA4844
 220 270 50
NA4840
 200 250 50
NA4838
 190 240 50
NA4836
 180 225 45
NA4834
 170 215 45
NA4832
 160 200 40
NA4830
 150 190 40
NA4828
 140 175 35
Model number Basic size Basic load rating Rated speed
Dynamic state Static Reference speed Limiting speed
d [in] D [in] B [in] C [Ibf] C₀ [Ibf] [r/min] [r/min]
NA6905A
NA6902A
NA6901A
NA6900A
NA4844
NA4840
NA4838
NA4836
NA4834
NA4832
NA4830
NA4828

Advantage

‌The main features of needle roller bearings include high load-bearing capacity, compact structure, low friction and high efficiency, good durability and high precision‌. ‌


‌1. High load-bearing capacity‌: Since the length of the needle roller is greater than the diameter, the needle roller bearing has a large contact area and can withstand large radial loads. This makes the needle roller bearing perform well in high-load situations.


‌2. Compact structure‌: The structure of the needle roller bearing is very compact, which can provide a high load-bearing capacity in a limited space, especially suitable for application scenarios with limited axial space.


‌3. Low friction and high efficiency‌: The needle roller bearing reduces friction through rolling contact between the rolling element and the inner and outer rings, improves transmission efficiency, and reduces energy loss.


‌4. Good durability and high precision‌: The needle roller bearing uses wear-resistant materials, has high manufacturing precision, can maintain stable performance in harsh working environments, and has a long service life.


‌5. Strong adaptability‌: Needle roller bearings are suitable for a variety of different working environments and working conditions, and can be widely used in various mechanical equipment to ensure the normal operation of the equipment.


‌6. Simple structure‌: The needle roller bearing has a simple structure, a small contact area between the needle roller and the inner and outer rings, and can withstand high speeds.


These characteristics make needle roller bearings widely used in mechanical equipment, especially in situations that require high load capacity, compact structure and low friction.