THK | Railway

Railway systems are among the most demanding mechanical environments in the world — subject to heavy loads, constant vibration, extreme weather conditions, and the expectation of near-continuous operation over decades of service. THK's linear motion components are designed to meet these challenges with robust construction, high load ratings, and exceptional fatigue resistance that keeps critical railway systems running reliably over long service intervals. From door operating mechanisms and HVAC systems to pantograph assemblies and braking components, THK products are found throughout rolling stock and infrastructure applications where durability and safety are non-negotiable. THK's extensive experience in high-cycle, heavy-load environments makes its components a trusted choice for railway engineers and manufacturers who require precision motion solutions capable of performing consistently across the full lifespan of the system — reducing maintenance requirements and contributing to the overall safety and efficiency of rail operations worldwide.

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Ball Spline

The Ball Spline is a rolling guide spline bearing. This is an innovative product with a ball rolling on a groove connected to the shaft, realizing allowable loads greater than with linear bushing and enabling torque transmission while making linear movements.

Cam Follower

The Cam Follower is a compact bearing with a high-rigidity shaft and a built-in needle bearing. Most suitable as a guide roller for cam mechanisms and linear motion of automated machines and dedicated machines.

Cross Roller Ring

With the Cross-Roller Ring, cylindrical rollers are arranged crosswise, with each roller perpendicular to the adjacent roller, in a 90゜V groove, separated from each other by a spacer retainer. This design allows just single bearing to receive loads in all directions including, radial, axial and moment loads. Since the Cross-Roller Ring achieves high rigidity despite the minimum possible dimensions of the inner and outer rings, it is optimal for applications such as joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators, precision rotary tables, medical equipment, measuring instruments and IC manufacturing machines.

Linear Bushing

Linear Bushing model LM is a linear motion system used in combination with a cylindrical LM shaft to perform infinite straight motion. The balls in the loaded area of the nut are in point contact with the LM shaft. This allows straight motion with minimal friction resistance and achieves highly accurate and smooth motion despite the small permissible load.

Linear Bushing (Inch)

THK's Inch Series of Linear Bushings. (POWER LINEAR BUSHING) The POWER LINEAR BUSH has extremely smooth and quiet motion due to a uniquely designed ball retainer and outer sleeve. They are constructed of engineering polymer, which is lightweight, low friction and highly wear-resistant.

Linear Motion Guide

The LM Guide (Linear Motion Guide) is our main product, incorporating a part with a linear rolling motion into practical usage for the first time in the world. It realizes the development of high-precision, high-rigidity, energy-saving, high-speed machines with long service lives.

Lubrication

An assortment of lubrication associated products is available to maintain sufficient lubrication of machines.

Roller Follower

The Roller Follower is a compact and highly rigid bearing system. It contains needle bearings and is used as a guide roller for cam discs and straight motion. Since its outer ring rotates while keeping direct contact with the mating surface, this product is thickwalled and designed to bear an impact load.

Slide Rail

Slide Rail model FBL is a thin, compact, lightweight and ultra-low price slide unit for finite motion. It has two rows of balls placed between an inner rail (made of a steel sheet roll-formed with precision) and an outer rail. The balls are evenly spaced by a cage press-molded with precision, thus eliminating friction between balls and achieving a smooth slide mechanism.