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
MMC313K
Single
65 mm
140 mm
33 mm
102700 N
53100 N
12840 rpm
25680 rpm
Ceramic
MMC308K
Single
40 mm
90 mm
23 mm
45000 N
20300 N
20520 rpm
41040 rpm
Ceramic
MM211K
Single
55 mm
100 mm
21 mm
48100 N
29100 N
13300 rpm
26600 rpm
STEEL
MM9114K
Single
70 mm
110 mm
20 mm
42200 N
30900 N
10700 rpm
21400 rpm
STEEL
MM9109K
Single
45 mm
75 mm
16 mm
23300 N
15100 N
16300 rpm
32600 rpm
STEEL
MMC211K
Single
55 mm
100 mm
21 mm
48100 N
26000 N
16000 rpm
32000 rpm
Ceramic
MMC9114K
Single
70 mm
110 mm
20 mm
42200 N
27500 N
12800 rpm
25600 rpm
Ceramic
MMC9109K
Single
45 mm
75 mm
16 mm
23300 N
13500 N
19600 rpm
39200 rpm
Ceramic
MM311K
Single
55 mm
120 mm
29 mm
79300 N
44600 N
12500 rpm
25000 rpm
STEEL
MM214K
Single
70 mm
125 mm
24 mm
69000 N
43600 N
10500 rpm
21000 rpm
STEEL
MM209K
Single
45 mm
85 mm
19 mm
36300 N
20200 N
16000 rpm
32000 rpm
STEEL
MMC311K
Single
55 mm
120 mm
29 mm
79300 N
39700 N
15000 rpm
30000 rpm
Ceramic
MMC214K
Single
70 mm
125 mm
24 mm
69000 N
39200 N
12600 rpm
25200 rpm
Ceramic
MMC204K
Single
20 mm
47 mm
14 mm
14200 N
5860 N
39400 rpm
78800 rpm
Ceramic
MM9107K
Single
35 mm
62 mm
14 mm
17700 N
10300 N
20700 rpm
41400 rpm
STEEL
MM9301K
Single
12 mm
24 mm
6 mm
3700 N
1610 N
N/A
N/A
STEEL
MM9305K
Single
25 mm
42 mm
9 mm
7790 N
4000 N
N/A
N/A
STEEL
MMC9107K
Single
35 mm
62 mm
14 mm
17700 N
9150 N
24800 rpm
49600 rpm
Ceramic
MM9101K
Single
12 mm
28 mm
8 mm
5670 N
2400 N
52800 rpm
105600 rpm
STEEL
MM9105K
Single
25 mm
47 mm
12 mm
11200 N
5900 N
28300 rpm
56600 rpm
STEEL
MM207K
Single
35 mm
72 mm
17 mm
28500 N
15300 N
19800 rpm
39600 rpm
STEEL
MMC9101K
Single
12 mm
28 mm
8 mm
5670 N
2130 N
63400 rpm
126800 rpm
Ceramic
MMC9105K
Single
25 mm
47 mm
12 mm
11200 N
5210 N
34000 rpm
68000 rpm
Ceramic
MMC207K
Single
35 mm
72 mm
17 mm
28500 N
13600 N
23800 rpm
47600 rpm
Ceramic