In actual factory environments, machines rarely stay perfectly aligned after long operating hours. We have seen many cases where vibration, shaft movement, installation deviation, or housing wear gradually affect bearing performance. Standard bearings often generate extra heat and noise under these conditions, which can eventually lead to premature failure.
Our Aligning Needle Roller Bearings are developed to handle these real operating challenges more effectively. The self-aligning structure allows the bearing to automatically compensate for minor alignment errors during rotation, helping machinery maintain smoother operation and reducing unnecessary stress on the bearing system.
This type of bearing is especially suitable for equipment running continuously for long periods or operating under unstable load conditions.
| Designation | Bore Diameter (mm) | Needle Roller Bore (mm) | Outer Diameter (mm) | Width (mm) | Dynamic Load Rating (kN) | Limiting Speed (r/min) |
| PNA 17/35 | 17 | - | 35 | 16 | 13.2 | 22, 000 |
| PNA 25/47 | 25 | - | 47 | 20 | 22.9 | 15, 000 |
| PNA 30/52 | 30 | - | 52 | 20 | 24.6 | 13, 000 |
| RPNA 15/28 | - | 15 | 28 | 12 | 7.37 | 28, 000 |
| RPNA 20/35 | - | 20 | 35 | 16 | 13.2 | 22, 000 |
| PNA 22/44 | 22 | - | 44 | 20 | 22 | 16, 000 |
| PNA 35/55 | 35 | - | 55 | 20 | 26.4 | 11, 000 |
| PNA 40/62 | 40 | - | 62 | 20 | 27.5 | 10, 000 |
| RPNA 25/42 | - | 25 | 42 | 20 | 19 | 18, 000 |
| RPNA 30/47 | - | 30 | 47 | 20 | 22.9 | 15, 000 |
| PNA 20/42 | 20 | - | 42 | 20 | 19 | 18, 000 |
| RPNA 35/52 | - | 35 | 52 | 20 | 24.6 | 13, 000 |
| RPNA 40/55 | - | 40 | 55 | 20 | 26.4 | 11, 000 |
| RPNA 45/62 | - | 45 | 62 | 20 | 27.5 | 10, 000 |
| PNA 12/28 | 12 | - | 28 | 12 | 7.37 | 28, 000 |
| PNA 15/32 | 15 | - | 32 | 16 | 12.8 | 24, 000 |
| RPNA 18/32 | - | 18 | 32 | 16 | 12.8 | 24, 000 |

| typical Aligning Needle Roller Bearings Models | |||
| Designation | Dimensions (mm) | Basic Load Ratings (kN) | Application Scenarios |
| RPNA 15/28 | Fw=15, D=28, C=12±0.5, D1=24.5, r min.=0.8 | dyn. Cr=6.9, stat. Cor=7.9 | Small gearboxes, pumps |
| RPNA 18/32 | Fw=18, D=32, C=16±0.5, D1=27, r min.=1.8 | dyn. Cr=12.5, stat. Cor=16.2 | Textile machinery, conveyors |
| RPNA 20/35 | Fw=20, D=35, C=16±0.5, D1=30.5, r min.=2.8 | dyn. Cr=13, stat. Cor=17.5 | Agricultural equipment |
| RPNA 25/42 | Fw=25, D=42, C=20±0.5, D1=36.5, r min.=3.8 | dyn. Cr=18.8, stat. Cor=30.5 | Machine tools, compressors |
| RPNA 28/44 | Fw=28, D=44, C=20±0.5, D1=38.5, r min.=4.8 | dyn. Cr=22, stat. Cor=34 | Printing presses |
| RPNA 30/47 | Fw=30, D=47, C=20±0.5, D1=42, r min.=5.8 | dyn. Cr=22.6, stat. Cor=36 | Fans, blowers |
| RPNA 35/52 | Fw=35, D=52, C=20±0.5, D1=47.5, r min.=6.8 | dyn. Cr=24.3, stat. Cor=41.5 | Construction machinery |
| RPNA 40/55 | Fw=40, D=55, C=20±0.5, D1=50.5, r min.=7.8 | dyn. Cr=26, stat. Cor=47 | Material handling systems |
| RPNA 45/62 | Fw=45, D=62, C=20±0.5, D1=58, r min.=8.8 | dyn. Cr=27.5, stat. Cor=53 | Heavy-duty conveyors |
| PNA 12/28 | d=12, F=15, D=28, C=12±0.5, B=12, D1=24.5, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=6.9, stat. Cor=7.9 | Small motors, precision tools |
| PNA 15/32 | d=15, F=18, D=32, C=16±0.5, B=16, D1=27, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=12.5, stat. Cor=16.2 | Textile spindles |
| PNA 17/35 | d=17, F=20, D=35, C=16±0.5, B=16, D1=30.5, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=13, stat. Cor=17.5 | Packaging machines |
| PNA 20/42 | d=20, F=25, D=42, C=20±0.5, B=20, D1=36.5, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=18.8, stat. Cor=30.5 | Automobile accessories |
| PNA 22/44 | d=22, F=28, D=44, C=20±0.5, B=20, D1=38.5, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=22, stat. Cor=34 | Hydraulic pumps |
| PNA 25/47 | d=25, F=30, D=47, C=20±0.5, B=20, D1=42, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=22.6, stat. Cor=36 | Pneumatic tools |
| PNA 30/52 | d=30, F=35, D=52, C=20±0.5, B=20, D1=47.5, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=24.3, stat. Cor=41.5 | Mining equipment |
| PNA 35/55 | d=35, F=40, D=55, C=20±0.5, B=20, D1=50.5, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=26, stat. Cor=47 | Marine auxiliary systems |
| PNA 40/62 | d=40, F=45, D=62, C=20±0.5, B=20, D1=58, r min.=0.8, r1 min.=0.3, s min.=0.5 | dyn. Cr=27.5, stat. Cor=53 | Industrial mixers |
The specially designed outer ring raceway allows the bearing to adjust naturally when shaft deflection or mounting inaccuracies occur. This helps improve operational stability and reduces uneven wear.
Compared with ordinary ball bearings, needle roller bearings provide larger contact surfaces while maintaining a smaller cross-sectional size. This makes them ideal for equipment with limited installation space.
Our factory uses automatic grinding and precision assembly equipment to improve raceway smoothness and rotational consistency. Customers using BMT bearings in motors and transmission systems often require stable low-noise performance, especially for continuous-running machinery.
From material selection to heat treatment and final inspection, every production step follows strict internal quality standards. BMT Bearings has accumulated extensive production experience in supplying industrial bearings for demanding applications worldwide.
BMT Aligning Needle Roller Bearings are widely used in:
· Electric motors
· Pumps and reducers
· Agricultural machinery
· Textile equipment
· Packaging machines
· Conveyor systems
· Industrial fans
· Automation machinery
· Household appliance motors
· Motorcycle transmission parts
Many of our customers choose this bearing type because it performs well in environments where installation precision may vary or continuous vibration exists.
We are not simply trading bearings. BMT Bearings has its own manufacturing facilities and automated production lines in China, allowing us to control quality from raw materials to finished products.
Over the years, we have continued improving our production process based on actual customer feedback and equipment operating conditions. This practical experience helps us better understand what industrial buyers truly care about:
· Stable quality between batches
· Accurate dimensions
· Consistent running performance
· Fast delivery capability
· Technical communication efficiency
· Long-term supply stability
Today, our annual production capacity exceeds 100 million bearing sets, supporting customers across multiple industries and international markets.
Every batch of BMT Aligning Needle Roller Bearings goes through multiple inspection procedures before shipment, including:
· Dimensional accuracy inspection
· Hardness testing
· Raceway precision checking
· Noise and vibration testing
· Rotational performance testing
· Surface quality inspection
We understand that industrial buyers need products they can trust for long-term operation, not only attractive catalog descriptions. For this reason, we focus heavily on production consistency and traceable quality management.
Different equipment designs require different bearing specifications. BMT Bearings supports customized solutions according to customer drawings or technical requirements, including:
· Non-standard sizes
· Customized internal clearance
· Different sealing solutions
· Special cage structures
· Low-noise bearing configurations
· OEM laser marking and packaging
Our engineering team can help customers select suitable Aligning Needle Roller Bearings based on actual application conditions and operating requirements.
As a professional bearing manufacturer established in 2004, BMT Bearings continues to supply dependable bearing products for global industrial markets. We value long-term cooperation and focus on providing stable quality, responsive communication, and practical solutions for our customers.
If you are sourcing Aligning Needle Roller Bearings for OEM production, industrial maintenance, or distribution business, BMT Bearings welcomes your inquiry.
Address
No.183,Longfeng,West of Zhangting industrial Zone,Yuyao,Ningbo,China
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