Fafnir® Spindle Deep Groove Ball Bearings

**TIMKEN® Precision Ball Bearings: Superior Performance for Demanding Applications**

When precision, reliability, and durability are critical, engineers and manufacturers turn to **TIMKEN® Ball Bearings**, including the high-performance **Fafnir® Spindle and Deep Groove Ball Bearings (9100K, 200K, 300K series)**. Designed for industrial machinery, automotive systems, and precision equipment, these bearings deliver exceptional rotational accuracy, reduced friction, and extended service life—even in high-speed and high-load applications.

### **Technical Features & Engineering Excellence**
TIMKEN’s **Fafnir® Precision Ball Bearings** are engineered with exacting tolerances and premium materials to meet the rigorous demands of modern industrial applications. Key features include:

– **Ultra-Precise Manufacturing:** The **9100K, 200K, and 300K series** are manufactured to ABEC-7 or higher precision standards, ensuring minimal runout and vibration for smooth operation in high-speed spindles and precision instruments.
– **Optimized Raceway & Ball Geometry:** Advanced grinding techniques and superior surface finishes reduce friction and heat generation, enhancing efficiency and reducing wear.
– **High-Grade Steel Construction:** Made from vacuum-degassed bearing steel for superior hardness, fatigue resistance, and long-term durability.
– **Specialized Lubrication Options:** Available with high-performance greases or oil lubrication systems to suit high-RPM or extreme-temperature environments.
– **Robust Sealing & Shielding:** Configurable with contact or non-contact seals to protect against contaminants while maintaining low torque resistance.

### **Performance Advantages**
TIMKEN’s precision ball bearings outperform conventional bearings in critical areas:

– **Higher Speed Capability:** Precision-balanced design minimizes centrifugal forces, allowing stable operation at elevated RPMs in machine tool spindles and turbochargers.
– **Extended Bearing Life:** Reduced internal stress and optimized load distribution enhance fatigue resistance, lowering maintenance costs.
– **Superior Rigidity & Accuracy:** Essential for CNC machining, robotics, and medical equipment where micron-level precision is required.
– **Reduced Energy Consumption:** Low-friction designs improve efficiency, contributing to energy savings in motors and industrial drives.

### **Typical Applications**
TIMKEN’s **Fafnir® Precision Ball Bearings** are trusted in industries where failure is not an option:

– **Machine Tools & Spindles:** High-speed milling, grinding, and lathe applications requiring minimal vibration.
– **Automotive Systems:** Turbochargers, electric vehicle motors, and transmission components.
– **Aerospace & Defense:** Gyroscopes, actuators, and avionics systems.
– **Medical & Laboratory Equipment:** MRI scanners, dental drills, and precision robotics.
– **Industrial Pumps & Compressors:** Reliable performance in harsh, high-load environments.

For engineers seeking unmatched precision and durability, **TIMKEN’s Fafnir® 9100K, 200K, and 300K series** ball bearings represent the pinnacle of bearing technology—delivering consistent performance where it matters most.

*Trusted by industry leaders worldwide, TIMKEN continues to innovate, ensuring your machinery operates at peak efficiency with minimal downtime.*

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Part Number Rows per Set d - Bore D - Outer Diameter Bearing Width Ce - Dynamic Radial Rating (per row) C0 - Static Radial Rating (per row) Limiting Speed (Grease) (per row) Limiting Speed (Oil) Ball Type
MMC203K
Single
17 mm
40 mm
12 mm
10600 N
4230 N
46200 rpm
92400 rpm
Ceramic
MM9104K
Single
20 mm
42 mm
12 mm
9620 N
4400 N
34000 rpm
68000 rpm
STEEL
MMC9104K
Single
20 mm
42 mm
12 mm
9620 N
3980 N
40800 rpm
81600 rpm
Ceramic
MM204K
Single
20 mm
47 mm
14 mm
14200 N
6500 N
32800 rpm
65600 rpm
STEEL
MMC204K
Single
20 mm
47 mm
14 mm
14200 N
5860 N
39400 rpm
78800 rpm
Ceramic
MM9305K
Single
25 mm
42 mm
9 mm
7790 N
4000 N
N/A
N/A
STEEL
MM9105K
Single
25 mm
47 mm
12 mm
11200 N
5900 N
28300 rpm
56600 rpm
STEEL
MMC9105K
Single
25 mm
47 mm
12 mm
11200 N
5210 N
34000 rpm
68000 rpm
Ceramic
MM205K
Single
25 mm
52 mm
15 mm
15500 N
7800 N
27400 rpm
54800 rpm
STEEL
MMC205K
Single
25 mm
52 mm
15 mm
15500 N
6980 N
32900 rpm
65800 rpm
Ceramic
MM305K
Single
25 mm
62 mm
17 mm
26200 N
12100 N
26500 rpm
53000 rpm
STEEL
MMC305K
Single
25 mm
62 mm
17 mm
26200 N
10800 N
31800 rpm
63600 rpm
Ceramic
MM9306K
Single
30 mm
47 mm
9 mm
8050 N
5020 N
N/A
N/A
STEEL
MM9106K
Single
30 mm
55 mm
13 mm
14700 N
8300 N
23300 rpm
46600 rpm
STEEL
MMC9106K
Single
30 mm
55 mm
13 mm
14700 N
7390 N
28000 rpm
56000 rpm
Ceramic
MM206K
Single
30 mm
62 mm
16 mm
21600 N
11300 N
23000 rpm
46000 rpm
STEEL
MMC206K
Single
30 mm
62 mm
16 mm
21600 N
10000 N
27600 rpm
55200 rpm
Ceramic
MM306K
Single
30 mm
72 mm
19 mm
33100 N
15800 N
22300 rpm
44600 rpm
STEEL
MMC306K
Single
30 mm
72 mm
19 mm
33100 N
14100 N
26760 rpm
53520 rpm
Ceramic
MM9307K
Single
35 mm
55 mm
10 mm
10600 N
6830 N
N/A
N/A
STEEL
MM9107K
Single
35 mm
62 mm
14 mm
17700 N
10300 N
20700 rpm
41400 rpm
STEEL
MMC9107K
Single
35 mm
62 mm
14 mm
17700 N
9150 N
24800 rpm
49600 rpm
Ceramic
MM207K
Single
35 mm
72 mm
17 mm
28500 N
15300 N
19800 rpm
39600 rpm
STEEL
MMC207K
Single
35 mm
72 mm
17 mm
28500 N
13600 N
23800 rpm
47600 rpm
Ceramic