Thin Section Ball Bearings

**TIMKEN Ball Bearings: Precision Engineered for Demanding Applications**

TIMKEN is a global leader in engineered bearings and mechanical power transmission products, renowned for delivering superior performance, reliability, and durability. Among its extensive portfolio, **TIMKEN Deep Groove Ball Bearings** and **Thin Section Ball Bearings (61800, 61900 series)** stand out as critical components in industrial machinery, automotive systems, and precision equipment. These bearings are designed to handle radial and axial loads with exceptional efficiency, ensuring smooth operation and extended service life even in the most demanding environments.

### **Technical Features & Performance Advantages**

**Deep Groove Ball Bearings**
TIMKEN’s Deep Groove Ball Bearings are engineered for versatility, featuring deep raceway grooves that enable high-speed operation while accommodating both radial and moderate axial loads. Key benefits include:
– **Optimized Load Distribution:** Precision-ground raceways and high-quality steel construction ensure even load distribution, reducing wear and extending bearing life.
– **Low Friction & High Efficiency:** Advanced sealing options (such as shields or rubber seals) minimize friction and contamination, making them ideal for electric motors, pumps, and gearboxes.
– **Robust Construction:** Manufactured from premium chrome steel or corrosion-resistant materials, these bearings withstand harsh operating conditions, including high temperatures and heavy loads.

**Thin Section Ball Bearings (61800, 61900 Series)**
TIMKEN’s Thin Section Ball Bearings are designed for applications where space and weight savings are critical, without compromising performance. These bearings feature:
– **Compact, Lightweight Design:** With ultra-thin cross-sections, they are ideal for robotics, aerospace, medical equipment, and semiconductor machinery.
– **High Precision & Rigidity:** Tight tolerances and superior roundness ensure smooth motion control in precision applications.
– **Multiple Configurations:** Available in open, shielded, or sealed variants, with options for radial, angular contact, or four-point contact designs.

### **Typical Applications**
TIMKEN’s Deep Groove and Thin Section Ball Bearings are widely used across industries, including:
– **Industrial Machinery:** Conveyors, machine tools, and electric motors benefit from their durability and low maintenance.
– **Automotive Systems:** Alternators, transmissions, and wheel hubs rely on their high-speed capabilities and load resistance.
– **Precision Equipment:** Medical devices, robotics, and optical systems utilize thin-section bearings for their compactness and accuracy.

With a legacy of innovation and precision engineering, TIMKEN continues to set the standard for performance in ball bearing technology, ensuring optimal efficiency and reliability for critical applications worldwide. Whether in high-speed industrial equipment or compact precision instruments, TIMKEN bearings deliver unmatched performance and longevity.

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Part Number Clearance Bore Size d Features Outside Diameter D Outside Ring Width B Cr - Dynamic Load Rating C0r - Static Load Rating Grease Limiting Speed Oil Reference Speed
61903-2RZ
C0 (Normal)
17 mm
Non-Contact Seals
30 mm
7 mm
4600 N
2600 N
22000 rpm
26000 rpm
61800
C0 (Normal)
10 mm
Open
19 mm
5 mm
1700 N
840 N
34000 rpm
40000 rpm
61802
C0 (Normal)
15 mm
Open
24 mm
5 mm
2100 N
1300 N
26000 rpm
31000 rpm
61804
C0 (Normal)
20 mm
Open
32 mm
7 mm
4000 N
2500 N
21000 rpm
25000 rpm
61800-ZZ
C0 (Normal)
10 mm
Shields
19 mm
5 mm
1700 N
840 N
34000 rpm
40000 rpm
61802-ZZ
C0 (Normal)
15 mm
Shields
24 mm
5 mm
2100 N
1300 N
26000 rpm
31000 rpm
61804-ZZ
C0 (Normal)
20 mm
Shields
32 mm
7 mm
4000 N
2500 N
21000 rpm
25000 rpm
61800-2RS
C0 (Normal)
10 mm
Contact Seals
19 mm
5 mm
1700 N
840 N
34000 rpm
40000 rpm
61802-2RS
C0 (Normal)
15 mm
Contact Seals
24 mm
5 mm
2100 N
1300 N
26000 rpm
31000 rpm
61804-2RS
C0 (Normal)
20 mm
Contact Seals
32 mm
7 mm
4000 N
2500 N
21000 rpm
25000 rpm
61800-2RZ
C0 (Normal)
10 mm
Non-Contact Seals
19 mm
5 mm
1700 N
840 N
34000 rpm
40000 rpm
61802-2RZ
C0 (Normal)
15 mm
Non-Contact Seals
24 mm
5 mm
2100 N
1300 N
26000 rpm
31000 rpm
61804-2RZ
C0 (Normal)
20 mm
Non-Contact Seals
32 mm
7 mm
4000 N
2500 N
21000 rpm
25000 rpm
61900
C0 (Normal)
10 mm
Open
22 mm
6 mm
2700 N
1300 N
31000 rpm
37000 rpm
61902
C0 (Normal)
15 mm
Open
28 mm
7 mm
4300 N
2300 N
24000 rpm
29000 rpm
61904
C0 (Normal)
20 mm
Open
37 mm
9 mm
6400 N
3700 N
19000 rpm
22000 rpm
61900-ZZ
C0 (Normal)
10 mm
Shields
22 mm
6 mm
2700 N
1300 N
31000 rpm
37000 rpm
61902-ZZ
C0 (Normal)
15 mm
Shields
28 mm
7 mm
4300 N
2300 N
24000 rpm
29000 rpm
61904-ZZ
C0 (Normal)
20 mm
Shields
37 mm
9 mm
6400 N
3700 N
19000 rpm
22000 rpm
61900-2RS
C0 (Normal)
10 mm
Contact Seals
22 mm
6 mm
2700 N
1300 N
31000 rpm
37000 rpm