Inner Rings for Thrust Roller Bearings

**NTN Needle Roller Thrust Bearings & Inner Rings for High-Performance Applications**

NTN is a globally recognized leader in precision bearing technology, delivering robust and high-performance solutions for demanding industrial and automotive applications. Among its extensive product portfolio, **NTN Needle Roller Thrust Bearings and Inner Rings for Thrust Roller Bearings** stand out for their exceptional load capacity, compact design, and durability. These components are engineered to handle heavy axial loads while maintaining smooth operation in constrained spaces, making them ideal for applications where space efficiency and reliability are critical.

### **Technical Features & Design Advantages**
NTN’s Needle Roller Thrust Bearings incorporate precision-ground **needle rollers and hardened raceways**, ensuring optimal load distribution and reduced friction. The bearings are designed with **high-strength steel cages** that maintain roller alignment, preventing skewing and ensuring consistent performance under high-speed or high-load conditions. The **inner rings (shaft washers)** are precision-machined to exact tolerances, providing a secure fit and enhancing the overall rigidity of the bearing assembly.

Key features include:
– **High Axial Load Capacity:** Optimized needle roller geometry maximizes contact area, enabling superior thrust load support compared to conventional ball thrust bearings.
– **Space-Saving Design:** The slim cross-section allows for compact assembly configurations, making them ideal for applications with strict dimensional constraints.
– **Low Friction & High Rigidity:** Precision-ground surfaces and optimized roller profiles minimize rotational resistance while maintaining stability under heavy loads.
– **Enhanced Durability:** Heat-treated components and advanced surface treatments (such as phosphate or black oxide coatings) improve wear resistance and corrosion protection.

### **Performance Benefits for Industrial & Automotive Systems**
NTN’s Needle Roller Thrust Bearings excel in environments requiring **high axial stiffness and minimal deflection**, such as:
– **Automotive Transmissions & Clutch Systems:** Supporting axial loads in gear shift mechanisms, dual-clutch assemblies, and torque converter hubs.
– **Industrial Machinery:** Used in machine tool spindles, hydraulic pumps, and heavy-duty presses where precise axial load management is essential.
– **Aerospace & Precision Equipment:** Found in actuator systems, rotor assemblies, and other high-precision mechanisms requiring reliable thrust support.

### **Why Choose NTN Thrust Bearings?**
NTN’s commitment to **precision engineering, material innovation, and rigorous testing** ensures that these bearings deliver long service life even under extreme conditions. Whether in high-speed automotive drivetrains or heavy industrial equipment, NTN’s Needle Roller Thrust Bearings and Inner Rings provide the **durability, efficiency, and compact performance** needed for today’s advanced mechanical systems.

For applications demanding **high load capacity in minimal space**, NTN’s thrust bearing solutions offer a reliable, high-performance answer—backed by decades of engineering expertise and global quality standards.

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Part Number d d1 (-0.2/-0.5) B r Mass
WS89310
50.000 mm
95.000 mm
9.500 mm
1.100 mm
0.380 kg
WS87408
40.000 mm
90.000 mm
8.250 mm
1.100 mm
0.330 kg
WS87409
45.000 mm
100.000 mm
9.000 mm
1.100 mm
0.440 kg
WS87410
50.000 mm
110.000 mm
9.500 mm
1.500 mm
0.560 kg
WS87411
55.000 mm
120.000 mm
10.500 mm
1.500 mm
0.740 kg
WS87412
60.000 mm
130.000 mm
11.500 mm
1.500 mm
0.940 kg
WS87413
65.000 mm
140.000 mm
12.000 mm
2.000 mm
1.140 kg
WS87414
70.000 mm
150.000 mm
12.500 mm
2.000 mm
1.360 kg
WS87415
75.000 mm
160.000 mm
13.000 mm
2.000 mm
0.161 kg
WS87416
80.000 mm
170.000 mm
14.500 mm
2.100 mm
2.020 kg
WS81124
120.000 mm
155.000 mm
7.000 mm
1.000 mm
0.415 kg
WS81217
85.000 mm
125.000 mm
9.500 mm
1.000 mm
0.490 kg
WS81126
130.000 mm
170.000 mm
9.000 mm
1.000 mm
0.663 kg
WS81218
90.000 mm
135.000 mm
10.500 mm
1.100 mm
0.640 kg
WS81128
140.000 mm
178.000 mm
9.500 mm
1.000 mm
0.750 kg
WS81220
100.000 mm
150.000 mm
11.500 mm
1.100 mm
0.810 kg
WS81130
150.000 mm
188.000 mm
9.500 mm
1.000 mm
0.800 kg
WS81132
160.000 mm
198.000 mm
9.500 mm
1.000 mm
0.840 kg
WS81206
30.000 mm
52.000 mm
4.250 mm
0.600 mm
0.045 kg
WS81207
35.000 mm
62.000 mm
5.250 mm
1.000 mm
0.085 kg