The Timken Company MM9310WI2HQUH Precision Bearing Set

Description:

The Timken MM9310WI2HQUH precision bearing set is used in high-precision machine tool spindles and ball screw support systems requiring accurate radial and axial positioning. Commonly installed in CNC machining centers, milling machines, precision grinding equipment, and high-speed industrial machine tools. Maintenance teams, OEMs, and machine tool integrators use this precision bearing set for replacement, spindle rebuilding, and performance-critical machine maintenance.

Applications:

The Timken MM9310WI2HQUH precision bearing set is designed for high-speed, high-accuracy machine tool applications where rigidity, low runout, and precise shaft positioning are essential. It is commonly used in CNC machining centers, precision milling machines, grinding machines, ball screw support assemblies, and other industrial automation equipment requiring reliable spindle performance and extended operating life.

Technical Specifications:

• Manufacturer: Timken
• Manufacturer Part Number (MPN): MM9310WI2HQUH
• Alternate Reference: #305263
• Product Type: Precision bearing set
• Bearing Type: Single-row angular contact ball screw support bearing, QUH matched set
• Series: Fafnir MM9-H precision bearings
• Bore Diameter: 1.5000 in (38.100 mm)
• Outside Diameter: 2.8346 in (72.000 mm)
• Bearing Width: 0.6250 in (15.88 mm)
• Total Width: 2.5000 in (63.52 mm)
• Contact Angle: 60°
• Ball Type: Steel
• Cage Type: CR phenolic outer land riding cage
• Dynamic Radial Load Rating (C1): 8,150 lbf (36,300 N)
• Static Radial Load Rating (C0): 10,200 lbf (45,400 N)
• Limiting Speed (Grease): 2,500 rpm
• Limiting Speed (Oil): 5,000 rpm
• Application: Precision machine tool spindles and ball screw support systems

Common Replacements:

• Timken MM9310WI2HSUL
• Timken MM9310WI2HDUH
• Timken MM9310WI2HQUH matched set