Washer

**NTN Needle Roller Thrust Bearings & Washers: Precision Performance for Demanding Applications**

NTN Corporation, a global leader in bearing technology, delivers high-performance **Needle Roller Thrust Bearings and Washers** engineered to withstand extreme axial loads while maintaining compact, space-saving designs. These precision components are critical in applications where high load capacity, durability, and minimal friction are essential—particularly in automotive transmissions, industrial machinery, and heavy-duty equipment. By leveraging advanced materials, optimized geometries, and rigorous manufacturing standards, NTN’s needle roller thrust bearings ensure reliable operation even in the most demanding environments.

### **Technical Features & Design Advantages**
NTN’s **Needle Roller Thrust Bearings** incorporate a robust construction featuring needle rollers arranged in a flat or grooved washer configuration. Key design elements include:

– **High Load Capacity:** The use of small-diameter needle rollers maximizes the number of rolling elements, distributing axial loads evenly across the bearing surface. This design excels in applications with limited radial space but high thrust load requirements.
– **Low Friction & Smooth Operation:** Precision-ground rollers and hardened raceways minimize rotational resistance, reducing heat generation and energy loss—critical for high-speed automotive and industrial systems.
– **Thin Section Design:** The compact profile allows integration into tightly constrained assemblies, such as gearboxes, clutch systems, and hydraulic pumps, without sacrificing performance.
– **Durable Materials & Coatings:** NTN utilizes high-carbon chromium steel and specialized surface treatments (e.g., phosphate or black oxide coatings) to enhance wear resistance and corrosion protection, extending service life.
– **Washer Variants:** Complementary thrust washers (flat or with locating lips) provide additional support, ensuring proper alignment and load distribution in assemblies like planetary gear sets or camshaft thrust plates.

### **Performance Benefits**
NTN’s thrust bearings are engineered to outperform conventional ball thrust bearings in scenarios requiring:
– **Higher load ratings** in confined spaces.
– **Improved stiffness** for precision motion control.
– **Reduced maintenance needs** due to hardened surfaces and optimized lubrication retention.

### **Typical Applications**
1. **Automotive Systems:**
– Transmissions (thrust washers for gear positioning)
– Clutch release mechanisms
– Steering column pivot supports

2. **Industrial Machinery:**
– Construction equipment (pump drives, excavator slew rings)
– Machine tool spindles and linear actuators
– Agricultural gearboxes

3. **Precision Equipment:**
– Robotics (axial load support in rotary joints)
– Aerospace actuators

### **Why Choose NTN?**
With decades of expertise in needle roller bearing technology, NTN combines rigorous testing, advanced simulation tools, and global manufacturing capabilities to deliver components that meet **ISO, JIS, and OEM-specific standards**. Whether for high-speed automotive drivetrains or heavy industrial machinery, NTN’s thrust bearings and washers provide unmatched reliability, efficiency, and longevity.

For engineers seeking a balance of **compact design, high axial load capacity, and durability**, NTN’s needle roller thrust solutions offer a proven advantage in performance-critical applications.

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Part Number Dp1 Dp S r1 Mass
ZS5594
55.000 mm
94.000 mm
12.500 mm
1.000 mm
0.440 kg
ZS6099
60.000 mm
99.000 mm
12.500 mm
1.000 mm
0.470 kg
ZS65104
65.000 mm
104.000 mm
12.500 mm
1.000 mm
0.500 kg
ZS70109
70.000 mm
109.000 mm
14.500 mm
1.000 mm
0.612 kg
ZS75119
75.000 mm
119.000 mm
16.000 mm
1.000 mm
0.828 kg
ZS85134
85.000 mm
134.000 mm
18.000 mm
1.000 mm
1.180 kg
ZS95144
95.000 mm
144.000 mm
20.000 mm
1.000 mm
1.430 kg
ZS2546
25.000 mm
46.000 mm
7.000 mm
0.300 mm
0.062 kg
ZS3051
30.000 mm
51.000 mm
8.000 mm
0.300 mm
0.081 kg
ZS3059
30.000 mm
59.000 mm
8.000 mm
0.600 mm
0.125 kg
ZS3564
35.000 mm
64.000 mm
9.000 mm
0.600 mm
0.156 kg
ZS4069
40.000 mm
69.000 mm
10.000 mm
0.600 mm
0.190 kg
ZS4577
45.000 mm
77.000 mm
10.000 mm
0.600 mm
0.235 kg
ZS5084
50.000 mm
84.000 mm
11.500 mm
0.600 mm
0.316 kg
ZS5589
55.000 mm
89.000 mm
12.000 mm
0.600 mm
0.360 kg
ZS120179
120.000 mm
179.000 mm
23.000 mm
1.000 mm
2.460 kg
ZS1229
12.000 mm
29.000 mm
5.500 mm
0.300 mm
0.023 kg
ZS130189
130.000 mm
189.000 mm
24.000 mm
1.000 mm
2.740 kg
ZS140199
140.000 mm
199.000 mm
25.000 mm
1.000 mm
3.030 kg
AS1122
110.000 mm
145.000 mm
1.000 mm
N/A
0.055 kg