Thk HRW21CR1UUGKBLO 4-way Linear Motion Guide Block

Product Description

The THK HRW21CR1UUGKBLO is a 4-way linear motion guide block designed for precision linear motion applications. It handles loads from four directions, providing rigidity and accuracy in demanding machine tool, automation, and industrial equipment installations. Key performance figures include a dynamic load capacity of 6.18 kN and a static load rating of 11.5 kN. The block measures 59 mm (approximately 2.32 inches) long by 54 mm (approximately 2.13 inches) wide by 18 mm (approximately 0.71 inches) high, with an 8.5 mm overhang. Mechanical engineers, machine builders, and industrial maintenance technicians install this component as part of a complete HRW series rail-and-block linear guide system.

This guide block is suited for use in CNC machining centers, robotic positioning systems, semiconductor handling equipment, and precision automation platforms where controlled linear travel and load distribution across all four directions are required. The M5x6 mounting hole pattern simplifies integration into existing machine structures. Transverse hole spacing is 19 mm and lateral hole spacing is 31 mm, allowing straightforward alignment during assembly. The block is rated for a 21-inch high assembly configuration.

Key Features

• 4-way load capacity handles radial, reverse radial, and lateral loads simultaneously
• 6.18 kN dynamic load capacity for reliable performance under cyclic loading
• 11.5 kN static load rating for high-force clamping and positioning applications
• M5x6 tapped mounting holes with 19 mm transverse and 31 mm lateral spacing
• 8.5 mm overhang dimension for precise rail-to-block fit within the HRW series
• Compact profile at approximately 2.32 inches long by 2.13 inches wide by 0.71 inches high

Compatibility

Designed for use with THK HRW21 series linear guide rails as part of a matched rail-and-block linear motion system.

Installation Notes

Installation should be performed by a qualified mechanical technician or machine builder familiar with precision linear guide systems. De-energize all machine axes and relieve any preloaded spring or pneumatic forces before removing or installing guide blocks. Use calibrated torque tools and follow the machine manufacturer's assembly tolerances when fastening the block to the carriage plate; do not overtighten M5 fasteners beyond the machine builder's specified values. Ensure the mating rail surface is clean and free of burrs before seating the block to avoid damage to the internal rolling elements.