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.*

MORE +
CLOSE +
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
MM309K
Single
45 mm
100 mm
25 mm
58500 N
31700 N
15200 rpm
30400 rpm
STEEL
MMC9112K
Single
60 mm
95 mm
18 mm
32600 N
20600 N
15000 rpm
30000 rpm
Ceramic
MMC309K
Single
45 mm
100 mm
25 mm
58500 N
28200 N
18240 rpm
36480 rpm
Ceramic
MM212K
Single
60 mm
110 mm
22 mm
58200 N
36300 N
12100 rpm
24200 rpm
STEEL
MM9110K
Single
50 mm
80 mm
16 mm
24200 N
16700 N
14900 rpm
29800 rpm
STEEL
MMC212K
Single
60 mm
110 mm
22 mm
58200 N
32000 N
14500 rpm
29000 rpm
Ceramic
MMC9110K
Single
50 mm
80 mm
16 mm
24200 N
14700 N
17900 rpm
35800 rpm
Ceramic
MM312K
Single
60 mm
130 mm
31 mm
90700 N
51800 N
11500 rpm
23000 rpm
STEEL
MM210K
Single
50 mm
90 mm
20 mm
38900 N
23100 N
14600 rpm
29200 rpm
STEEL
MMC312K
Single
60 mm
130 mm
31 mm
90700 N
46100 N
13800 rpm
27600 rpm
Ceramic
MMC210K
Single
50 mm
90 mm
20 mm
38900 N
20600 N
17500 rpm
35000 rpm
Ceramic
MM9113K
Single
65 mm
100 mm
18 mm
33900 N
25200 N
11600 rpm
23200 rpm
STEEL
MM310K
Single
50 mm
110 mm
27 mm
68600 N
37900 N
13800 rpm
27600 rpm
STEEL
MMC9113K
Single
65 mm
100 mm
18 mm
33900 N
22400 N
13900 rpm
27800 rpm
Ceramic
MMC310K
Single
50 mm
110 mm
27 mm
68600 N
33700 N
16560 rpm
33120 rpm
Ceramic
MM213K
Single
65 mm
120 mm
23 mm
63400 N
40000 N
11100 rpm
22200 rpm
STEEL
MM208K
Single
40 mm
80 mm
18 mm
36200 N
20000 N
17700 rpm
35400 rpm
STEEL
MM9311K
Single
55 mm
80 mm
13 mm
18400 N
14100 N
N/A
N/A
STEEL
MMC213K
Single
65 mm
120 mm
23 mm
63400 N
35600 N
13300 rpm
26600 rpm
Ceramic
MMC208K
Single
40 mm
80 mm
18 mm
36200 N
17700 N
21200 rpm
42400 rpm
Ceramic
MM9111K
Single
55 mm
90 mm
18 mm
31400 N
21400 N
13500 rpm
27000 rpm
STEEL
MM313K
Single
65 mm
140 mm
33 mm
102700 N
59700 N
10700 rpm
21400 rpm
STEEL
MM308K
Single
40 mm
90 mm
23 mm
45000 N
22800 N
17100 rpm
34200 rpm
STEEL
MMC9111K
Single
55 mm
90 mm
18 mm
31400 N
18900 N
16200 rpm
32400 rpm
Ceramic