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
KMJ23X31X25.3XS
23.000 mm
31.000 mm
25.300 mm
KMJ18X24X17SV1
18.000 mm
24.000 mm
17.000 mm
0.014 kg
KMJ20X26X13
20.000 mm
26.000 mm
13.000 mm
0.012 kg
KMJ20X26X13.8X1S
20.000 mm
26.000 mm
14.000 mm
0.013 kg
KMJ20X26X17S
20.000 mm
26.000 mm
17.000 mm
0.016 kg
KMJ20X26X20
20.000 mm
26.000 mm
20.000 mm
0.019 kg
KMJ20X26X20S
20.000 mm
26.000 mm
20.000 mm
0.019 kg
KMJ10X14X11.3XS
10.000 mm
14.000 mm
11.500 mm
0.004 kg
KMJ12X16X11.3XS
12.000 mm
16.000 mm
11.500 mm
0.005 kg
KBK9X12X11.7V2
9.000 mm
12.000 mm
11.500 mm
0.003 kg
KMJ12X17X9.8XS
12.000 mm
17.000 mm
10.000 mm
0.005 kg
KJ16X22X23.8XS
16.000 mm
22.000 mm
23.800 mm
0.018 kg
KMJ15X20X15.8XS
15.000 mm
20.000 mm
16.000 mm
0.009 kg
KJ30X35X17S
30.000 mm
35.000 mm
17.000 mm
0.021 kg
KMJ15X21X16.8X1SK
15.000 mm
21.000 mm
17.000 mm
0.012 kg
KJ30X36X31.8X1S
30.000 mm
36.000 mm
31.800 mm
KMJ15X21X17
15.000 mm
21.000 mm
17.000 mm
0.014 kg
KJ32X36X25.7XS
32.000 mm
36.000 mm
25.700 mm
0.024 kg
KJ32X37X27S
32.000 mm
37.000 mm
27.000 mm
0.037 kg
KJ32X38X20S
32.000 mm
38.000 mm
20.000 mm
0.031 kg