Overview
The NB slide screw is a mechanical device that converts rotational motion into linear motion using the friction between radial ball bearings and a shaft. It is primarily used in transport devices within various machines and is not designed for precise positioning.

Structure and Advantages
The slide screw consists of two aluminum blocks with radial bearings and a round shaft. The rotation of the shaft results in linear motion, with thrust adjustable via spring-loaded bolts. Key advantages include suitability for long-stroke applications, high machine efficiency (up to 90%), no lubrication requirement beyond initial pre-lubrication, and a mechanism to prevent excessive load damage.

Selection Method
Thrust is generated by tightening bolts, and it should not exceed the required force for the application. The frictional resistance and inertia are considered to determine the required thrust. The rated life of the slide screw is calculated based on the number of revolutions, total travel distance, and life time.

Allowable Rotational Speed
The critical speed, which is the maximum speed before the shaft becomes inoperative, is calculated using specific equations. The maximum operating speed should be set at 80% of the critical speed to ensure safety.

Installation
Installation involves cleaning the drive shaft, placing it between blocks, adjusting parallelism, and tightening bolts to eliminate slippage. Care must be taken to avoid excessive tightening, which can reduce the rated life.

Use and Handling Precautions
Recommendations include using a heat-treated ground shaft, ensuring parallelism to avoid unbalanced loads, and transferring radial loads to linear motion guides to extend the slide screw's life.

Special Requirements
NB offers customization for slide screws to meet specific needs, such as special or reverse leads.

Technical Specifications
Detailed specifications are provided for various part numbers, including dimensions, maximum thrust, and tightening torque. The document also includes calculation examples for selecting appropriate slide screws based on specific conditions.