**TIMKEN® Precision Ball Bearings: Fafnir® Single Row Imperial Ball Screw Support Bearings (MM9 H)**

When precision, durability, and high-performance motion control are critical, **TIMKEN’s Fafnir® Single Row Imperial Ball Screw Support Bearings (MM9 H)** deliver unmatched reliability for demanding industrial and automotive applications. Engineered to support axial and radial loads in ball screw assemblies, these precision ball bearings are designed for high rigidity, smooth operation, and extended service life—even in harsh operating conditions.

### **Technical Features & Design Advantages**
The **MM9 H series** features a **single-row angular contact design**, optimized to handle combined loads with superior accuracy. Key technical attributes include:

– **High-Precision Grinding:** Manufactured to tight tolerances (ABEC precision grades available) for minimal runout and consistent performance in precision machinery.
– **Robust Construction:** Made from premium **high-carbon chromium steel** for exceptional hardness and fatigue resistance, ensuring durability under heavy loads.
– **Optimized Contact Angle:** The angular contact design (typically 60°) maximizes axial load capacity while maintaining radial load support—ideal for ball screw applications.
– **Sealed & Shielded Options:** Available with **contact seals (RS) or non-contact shields (ZZ)** to protect against contaminants while retaining lubrication.
– **Preloaded Configurations:** Adjustable preload options enhance system rigidity, reducing deflection and improving positional accuracy in CNC machines and automation systems.

### **Performance Benefits**
TIMKEN’s **Fafnir® MM9 H bearings** excel in applications requiring **high-speed rotation, precise linear motion, and minimal friction**. Their advantages include:

– **Reduced Friction & Heat Generation:** Precision-ground raceways and high-quality steel minimize energy loss, improving efficiency in servo-driven systems.
– **Extended Service Life:** Advanced heat treatment and surface finishing resist wear, even in continuous-duty cycles.
– **Vibration Dampening:** Stable operation reduces noise and vibration, critical for medical equipment, robotics, and aerospace actuators.

### **Typical Applications**
These bearings are widely used in industries where **precision motion control** is essential:

– **Industrial Machinery:** Ball screw supports in CNC machine tools, robotic arms, and linear actuators.
– **Automotive Systems:** Steering systems, electric vehicle (EV) drivetrains, and transmission components.
– **Aerospace & Defense:** Flight control actuators, landing gear mechanisms, and satellite positioning systems.
– **Medical Equipment:** High-accuracy imaging devices and surgical robotics.

### **Why Choose TIMKEN?**
With over a century of expertise in bearing technology, **TIMKEN** combines rigorous engineering with global manufacturing standards to ensure reliability. The **Fafnir® MM9 H series** reflects this commitment—offering a balance of **precision, load capacity, and longevity** for mission-critical applications.

For industries pushing the limits of speed and accuracy, TIMKEN’s **ball screw support bearings** provide the foundation for smooth, dependable motion—driving innovation in automation, transportation, and beyond.

**Upgrade your system’s performance with TIMKEN’s precision-engineered solutions.**