Fafnir® Spindle Angular Contact Ball Bearings (9300WI, 9100WI, 200WI, 300WI)

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

When precision, reliability, and high-speed performance are critical, TIMKEN® Ball Bearings—including the renowned *Fafnir® Spindle Angular Contact Ball Bearings* (9300WI, 9100WI, 200WI, 300WI series)—deliver unmatched durability and efficiency. Engineered for exacting industrial, automotive, and precision equipment applications, these bearings combine advanced materials, precision manufacturing, and innovative design to optimize load capacity, rotational accuracy, and service life.

### **Technical Features & Design Advantages**
TIMKEN’s *Fafnir® Spindle Angular Contact Ball Bearings* are designed for high-speed, high-precision applications where rigidity and low friction are essential. Key features include:

– **Superior Steel Construction**: Manufactured from premium-grade steel, these bearings offer exceptional hardness, wear resistance, and fatigue life, even under heavy loads and high RPMs.
– **Angular Contact Design**: The optimized contact angle (typically 15° or 25°) ensures precise axial and radial load distribution, reducing deflection and improving stiffness in spindle applications.
– **Precision Ground Raceways**: Ultra-smooth surfaces minimize vibration and noise, critical for machining accuracy in CNC equipment and high-speed tools.
– **Advanced Lubrication Options**: Available with grease or oil lubrication, these bearings maintain performance in extreme temperatures and high-speed conditions.
– **Sealed & Shielded Variants**: Select models feature integrated seals or shields to prevent contamination in harsh environments.

### **Performance Benefits**
TIMKEN’s precision ball bearings excel in applications demanding tight tolerances and minimal runout:

– **High-Speed Capability**: Optimized internal geometry reduces heat generation, enabling stable operation at elevated speeds.
– **Extended Service Life**: Advanced heat treatment and material purity enhance durability, reducing downtime and maintenance costs.
– **Rigidity & Accuracy**: Ideal for machine tool spindles, robotics, and precision gearboxes where alignment and repeatability are critical.

### **Typical Applications**
These bearings are trusted in industries requiring precision motion control:

– **Industrial Machinery**: CNC lathes, grinding machines, and milling spindles rely on their low vibration and high rigidity.
– **Automotive Systems**: Used in turbochargers, electric motors, and transmission systems where high RPMs and load capacity are vital.
– **Aerospace & Medical Equipment**: Critical for high-precision actuators, rotary tables, and imaging devices.

For engineers and OEMs seeking uncompromising performance, TIMKEN’s *Fafnir® Spindle Bearings* represent a proven solution—combining decades of metallurgical expertise with cutting-edge bearing technology to maximize efficiency and reliability in the most demanding environments.

*Choose TIMKEN for precision that drives innovation.*

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Part Number Rows per Set d - Bore D - Outer Diameter Bearing Width Total Width Contact Angle C0 - Static Radial Rating (per row) Ce - Dynamic Radial Rating (per row) Ball Type
3MMC220WICRSUL
Single
100 mm
180 mm
34 mm
34 mm
25 º
107800 N
157500 N
Ceramic
3MM220WICRSUL
Single
100 mm
180 mm
34 mm
34 mm
25 º
121000 N
157500 N
STEEL
2MM220WICRDUL
Duplex
100 mm
180 mm
34 mm
68 mm
15 º
126800 N
165200 N
STEEL
2MMC220WICRDUL
Duplex
100 mm
180 mm
34 mm
68 mm
15 º
112900 N
165200 N
Ceramic
3MMC220WICRDUL
Duplex
100 mm
180 mm
34 mm
68 mm
25 º
107800 N
157500 N
Ceramic
3MM220WICRDUL
Duplex
100 mm
180 mm
34 mm
68 mm
25 º
121000 N
157500 N
STEEL
2MM220WICRTUL
Triplex
100 mm
180 mm
34 mm
102 mm
15 º
126800 N
165200 N
STEEL
2MMC220WICRTUL
Triplex
100 mm
180 mm
34 mm
102 mm
15 º
112900 N
165200 N
Ceramic
3MMC220WICRTUL
Triplex
100 mm
180 mm
34 mm
102 mm
25 º
107800 N
157500 N
Ceramic
3MM220WICRTUL
Triplex
100 mm
180 mm
34 mm
102 mm
25 º
121000 N
157500 N
STEEL
2MM220WICRQUL
Quadruplex
100 mm
180 mm
34 mm
136 mm
15 º
126800 N
165200 N
STEEL
2MMC220WICRQUL
Quadruplex
100 mm
180 mm
34 mm
136 mm
15 º
112900 N
165200 N
Ceramic
3MMC220WICRQUL
Quadruplex
100 mm
180 mm
34 mm
136 mm
25 º
107800 N
157500 N
Ceramic
3MMC9120WICRQUX
Quadruplex
100 mm
150 mm
24 mm
96 mm
25 º
65326 N
79200 N
Ceramic
3MMC9120WICRDUX
Duplex
100 mm
150 mm
24 mm
48 mm
25 º
65326 N
79200 N
Ceramic
3MM9120WIQULFS637
Quadruplex
100 mm
150 mm
24 mm
96 mm
25 º
73400 N
79200 N
STEEL
3MM9120WICRTUX
Triplex
100 mm
150 mm
24 mm
72 mm
25 º
73400 N
79200 N
STEEL
3MM9120WICRSUX
Single
100 mm
150 mm
24 mm
24 mm
25 º
73400 N
79200 N
STEEL
3MM9120WICRQUX
Quadruplex
100 mm
150 mm
24 mm
96 mm
25 º
73400 N
79200 N
STEEL
3MM9120WICRDUX
Duplex
100 mm
150 mm
24 mm
48 mm
25 º
73400 N
79200 N
STEEL
3MM9120WI TUM
Triplex
100 mm
150 mm
24 mm
72 mm
25 º
73400 N
79200 N
STEEL
3MM9120WI TUL
Triplex
100 mm
150 mm
24 mm
72 mm
25 º
73400 N
79200 N
STEEL
3MM9120WI SUM
Single
100 mm
150 mm
24 mm
24 mm
25 º
73400 N
79200 N
STEEL
3MM9120WI SUL
Single
100 mm
150 mm
24 mm
24 mm
25 º
73400 N
79200 N
STEEL