Thomson Industries Qsm 8 L 36 Round Linear Shaft

Product Description

The THOMSON INDUSTRIES QSM 8 L 36 is a round linear shaft designed for precision linear motion applications. Manufactured from 1566-grade steel and hardened to 60 to 65 HRC, this shaft delivers the surface hardness required for reliable operation in linear bearing systems. The shaft measures 8 millimeters in diameter and 36 inches in overall length, with a tightly controlled diameter tolerance range of 0.3146 inches to 0.3150 inches. Mechanical engineers, millwrights, and automation technicians install this type of shaft in linear guide assemblies across industrial and commercial machinery.

This shaft is suited for use in standard linear motion assemblies where a hardened steel shaft is required to interface with linear ball bushings, sleeve bearings, or pillow block bearing units. Typical applications include CNC equipment, automation frames, actuator assemblies, and general motion control systems requiring a 36-inch shaft span. The 8mm diameter and tolerance specifications align with standard Thomson linear bearing bore sizing, making it a direct fit in systems designed around that shaft diameter class.

Key Features

• 1566-grade steel construction for high strength and wear resistance
• Hardened to 60 to 65 HRC for extended service life in high-cycle linear motion applications
• Tight diameter tolerance of 0.3146 inches to 0.3150 inches for accurate bearing fit
• 36-inch overall length suits a wide range of mid-span linear guide configurations
• 8mm nominal diameter compatible with standard linear bearing bore sizes

Compatibility

Designed as an OEM-style replacement or build component for linear motion assemblies requiring an 8mm diameter hardened steel shaft at 36 inches overall length.

Installation Notes

Installation is typically performed by millwrights or mechanical technicians familiar with linear motion systems. Power down and de-energize all actuators and drive components before removing or installing the shaft. Ensure bearing bores and mounting blocks are clean and free of debris before seating the shaft. Verify shaft alignment after installation to prevent premature bearing wear.