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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]
RNA4916
 90 110 30 102 183 5000 4500
RNA4915
 85 105 30 98 170 5300 4800
RNA4914
 80 100 30 96.5 163 5600 5000
RNA4913
 72 90 25 71 120 6300 5600
RNA4912
 68 85 25 69.5 114 6700 6000
RNA4911
 63 80 25 67 106 7000 6300
RNA4910
 58 72 22 55 85 8000 7000
RNA4909
 52 68 22 52 78 8500 7500
RNA4908
 48 62 22 50 71 9500 8000
RNA4907
 42 55 20 36.5 54 11000 9500
RNA4906
 35 47 17 30 39 13000 11000
RNA4905
 30 42 17 28 34.5 15000 13000
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]
RNA4916
 5000 4500
RNA4915
 5300 4800
RNA4914
 5600 5000
RNA4913
 6300 5600
RNA4912
 6700 6000
RNA4911
 7000 6300
RNA4910
 8000 7000
RNA4909
 8500 7500
RNA4908
 9500 8000
RNA4907
 11000 9500
RNA4906
 13000 11000
RNA4905
 15000 13000

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.