THK Co., Ltd. 611859 Ball Screw Assembly Rotary To Linear Motion

Description:

The THK 611859 Ball Screw is a precision linear motion drive assembly featuring a 1-inch diameter screw shaft and an overall length of approximately 39 inches. Designed to convert rotary motion into smooth, accurate linear movement with high mechanical efficiency, it provides precise positioning, low friction, and long service life for industrial automation and machine tool applications. Commonly installed in CNC machines, automated manufacturing equipment, material handling systems, packaging machinery, and precision positioning systems. Maintenance teams, OEM machine builders, and system integrators use this ball screw for equipment repairs, retrofits, replacement, and new machine construction.

Applications:

The THK 611859 is a precision ball screw assembly engineered to deliver efficient linear motion by recirculating steel balls between the screw shaft and the ball nut. Compared with conventional lead screws, THK ball screws significantly reduce drive torque while providing high positioning accuracy, smooth operation, and extended service life. The assembly is suitable for CNC machinery, industrial robots, semiconductor equipment, automated assembly systems, measuring equipment, and other applications requiring repeatable, high-efficiency linear motion. While the manufacturer number 611859 identifies this specific assembly, detailed dimensional and preload specifications are not publicly available in THK documentation.

Technical Specifications:

• Brand: THK
• Part Number: 611859
• Product Type: Ball Screw Assembly
• Screw Diameter: 1 in (25.4 mm)
• Overall Length: Approximately 39 in (991 mm)
• Motion Type: Rotary to Linear Motion
• Bearing Type: Recirculating Ball Screw
• Drive Efficiency: High efficiency, low friction
• Positioning Accuracy: High precision linear positioning
• Backlash: Configuration dependent
• Lubrication: Grease or oil lubrication compatible
• Mounting: Machine-specific end support configuration
• Material: Hardened alloy steel screw shaft and ball nut
• Features: Smooth linear motion, high mechanical efficiency, low operating torque, high rigidity, long service life, suitable for precision positioning and industrial automation.

Common Replacements:

• THK BNK Series Ball Screw Assembly
• THK BIF Series Precision Ball Screw
• THK BLK Series Large Lead Ball Screw