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
K47X52X27
47.000 mm
52.000 mm
27.000 mm
0.051 kg
K48X53X25.8X3
48.000 mm
53.000 mm
26.000 mm
0.029 kg
K48X53X29.8X1
48.000 mm
53.000 mm
30.000 mm
0.062 kg
K48X53X37.5ZW
48.000 mm
53.000 mm
37.500 mm
0.072 kg
K43X48X17
43.000 mm
48.000 mm
17.000 mm
0.029 kg
K48X54X19
48.000 mm
54.000 mm
19.000 mm
0.044 kg
K43X48X27
43.000 mm
48.000 mm
27.000 mm
0.046 kg
K4X6X7.8X
4.000 mm
6.000 mm
8.000 mm
0.000 kg
K43X50X18
43.000 mm
50.000 mm
18.000 mm
0.049 kg
K4X7X7
4.000 mm
7.000 mm
7.000 mm
0.001 kg
K45X49X19
45.000 mm
49.000 mm
19.000 mm
0.027 kg
K4X7X72
4.000 mm
7.000 mm
7.000 mm
0.001 kg
K45X50X17
45.000 mm
50.000 mm
17.000 mm
0.033 kg
K45X50X27
45.000 mm
50.000 mm
27.000 mm
0.050 kg
K45X52X18
45.000 mm
52.000 mm
18.000 mm
0.051 kg
K45X52X21
45.000 mm
52.000 mm
21.000 mm
0.061 kg
K45X53X20
45.000 mm
53.000 mm
20.000 mm
0.062 kg
K45X53X25
45.000 mm
53.000 mm
25.000 mm
0.077 kg
K47X52X17
47.000 mm
52.000 mm
17.000 mm
0.033 kg
K42X47X17
42.000 mm
47.000 mm
17.000 mm
0.028 kg
K38X43X27
38.000 mm
43.000 mm
27.000 mm
0.043 kg
K42X47X27
42.000 mm
47.000 mm
27.000 mm
0.047 kg
K38X43X28.8X
38.000 mm
43.000 mm
29.000 mm
0.047 kg
K42X48X17
42.000 mm
48.000 mm
17.000 mm
0.036 kg