Needle Roller and Cage Assemblies

**NTN Needle Roller Bearings & Needle Roller and Cage Assemblies: Precision Performance for Demanding Applications**

NTN is a global leader in bearing technology, renowned for its high-performance needle roller bearings and needle roller and cage assemblies. These precision-engineered components are designed to deliver exceptional load capacity, durability, and efficiency in compact spaces, making them indispensable in industrial machinery, automotive systems, and precision equipment.

### **Technical Features & Design Advantages**
NTN’s needle roller bearings and cage assemblies are optimized for applications requiring high radial load support with minimal radial cross-section. Key features include:

– **High Load Capacity:** Despite their compact design, needle rollers provide a large load-bearing surface, enabling superior radial load handling compared to conventional ball bearings.
– **Space-Saving Design:** The slim profile reduces overall assembly size, making them ideal for applications with strict space constraints.
– **Precision Cage Guidance:** High-quality cages (typically steel or polymer) ensure smooth roller movement, reducing friction and wear while maintaining proper alignment.
– **Versatile Configurations:** Available in various designs, including drawn cup, solid, and open types, with options for sealed or open variants to suit different lubrication and contamination conditions.
– **Enhanced Durability:** Advanced heat treatment and surface finishing processes extend service life, even under high-speed or heavy-load conditions.

### **Performance Advantages**
NTN’s needle roller solutions excel in demanding environments due to:

– **Reduced Friction & Heat Generation:** Optimized roller geometry and cage design minimize energy loss, improving efficiency and reducing operating temperatures.
– **High-Speed Capability:** Precision balancing and low-mass rollers allow stable performance at elevated speeds.
– **Reliability in Harsh Conditions:** Resistant to shock loads, misalignment, and contamination, ensuring consistent operation in industrial and automotive settings.

### **Typical Applications**
These bearings are widely used in:

– **Automotive Systems:** Transmission components (gearboxes, differentials), engine accessories (rocker arms, cam followers), and steering mechanisms.
– **Industrial Machinery:** Printing presses, textile equipment, agricultural machinery, and construction gear where compact, high-load solutions are critical.
– **Precision Equipment:** Robotics, medical devices, and aerospace actuators requiring lightweight, high-rigidity bearing solutions.

By combining advanced engineering with rigorous quality control, NTN’s needle roller bearings and cage assemblies provide unmatched performance, reliability, and longevity—ensuring optimal functionality in the most challenging applications. Whether enhancing automotive efficiency or supporting heavy industrial loads, NTN delivers precision you can trust.

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Part Number Fw Ew Bc Mass
KV37X43X33.3XS
37.000 mm
43.000 mm
33.500 mm
0.062 kg
KV40X46X33.8XS
40.000 mm
46.000 mm
34.000 mm
0.063 kg
KV40X48X25SV1
40.000 mm
48.000 mm
25.000 mm
0.065 kg
KV43X48X37.8XZWS
43.000 mm
48.000 mm
38.000 mm
0.058 kg
KV44X50X30.8XS
44.000 mm
50.000 mm
31.000 mm
0.067 kg
KV44X50X41.8X1ZWS
44.000 mm
50.000 mm
41.800 mm
KV45X50X25.8XS
45.000 mm
50.000 mm
25.800 mm
0.045 kg
KV45X51X26.8XS
45.000 mm
51.000 mm
27.000 mm
0.058 kg
KV47X52X22.8XS
47.000 mm
52.000 mm
23.000 mm
0.044 kg
KV47X52X32.8XZWS
47.000 mm
52.000 mm
33.000 mm
0.064 kg
KV48X53X22.3XS
48.000 mm
53.000 mm
22.500 mm
0.042 kg
KMJ25X30X21.8XS
25.000 mm
30.000 mm
22.000 mm
0.020 kg
KMJ25X31X18.3X1SK
25.000 mm
31.000 mm
18.500 mm
0.021 kg
KMJ25X32X16
25.000 mm
32.000 mm
16.000 mm
0.025 kg
KMJ25X33X24S
25.000 mm
33.000 mm
24.000 mm
0.040 kg
KMJ25X33X24SV4
25.000 mm
33.000 mm
24.000 mm
0.040 kg
KMJ30X36X14
30.000 mm
36.000 mm
14.000 mm
0.022 kg
KMJ30X36X14V2
30.000 mm
36.000 mm
14.000 mm
0.021 kg
KMJ30X37X20
30.000 mm
37.000 mm
20.000 mm
0.038 kg
KMJ30X37X20S
30.000 mm
37.000 mm
20.000 mm
0.032 kg
KMJ30X38X26.3X2
30.000 mm
38.000 mm
26.300 mm
KMJ32X38X14
32.000 mm
38.000 mm
14.000 mm
0.022 kg
KMJ38X46X20
38.000 mm
46.000 mm
20.000 mm
0.046 kg
KMJ73X79X20
73.000 mm
79.000 mm
20.000 mm
0.063 kg