Thomson Industries 25MMSMAE L500MM Round Linear Shaft

Product Description

The THOMSON INDUSTRIES 25MMSMAE L500MM is a round linear shaft designed for precision linear motion applications. Machined from 1566 grade steel with a 60C hardness rating, this shaft delivers the dimensional consistency and surface durability required in demanding mechanical assemblies. The shaft measures 25 millimeters in diameter and 20 inches in overall length, with a tight diameter tolerance range of 0.9838 inches to 0.9843 inches. Annealed ends reduce brittleness at the shaft tips, making the part easier to work with during final fitting and assembly. Installation is typically performed by millwrights, mechanical technicians, or OEM assembly professionals working with linear guides and bearing systems.

This shaft is suited for use in linear motion systems found in industrial machinery, automation equipment, and precision mechanical assemblies. The annealed-end treatment makes it appropriate for applications where the shaft tip will be machined, drilled, or press-fit into a housing or end support. The 25mm nominal diameter matches standard metric linear bearing bore sizes, making it a practical choice for guided carriage systems and actuator assemblies that require consistent shaft geometry across the full 20-inch working length.

Key Features

• 25mm nominal diameter with tight tolerance range of 0.9838 inches to 0.9843 inches for precise bearing fit
• 1566 grade steel construction with 60C hardness for wear resistance in linear motion applications
• Annealed ends reduce tip brittleness and allow post-machining operations such as drilling or threading
• 20-inch overall length suitable for mid-span linear guide assemblies
• Consistent shaft geometry supports accurate carriage travel with minimal deflection

Compatibility

Designed as an OEM-style replacement or build component for linear motion assemblies using 25mm diameter round shafting with standard metric linear bearings and shaft supports.

Installation Notes

Installation should be performed by qualified mechanical technicians or millwrights familiar with linear motion system assembly. Secure all bearing supports and end blocks before loading the shaft into position. Do not exceed the shaft's rated load or span without consulting engineering load tables, as unsupported span length directly affects deflection and bearing wear. Inspect shaft surface for nicks or burrs before insertion into linear bearings to avoid premature bearing damage.