Linear Guide

Linear Guide

Linear guide can be divided into:

  • Roller linear guide
  • Cylindrical linear guide
  • Ball linear guide

It is used to support and guide moving parts and make reciprocating linear motion in a given direction.

Depending on the nature of the friction, linear motion guides can be divided into:

  • Sliding friction guide
  • Rolling friction guide
  • Elastic friction guide
  • Fluid friction guide


It can be divided into:

  • Square ball linear guide
  • Double shaft roller linear guide
  • Single-axis linear guide

Working principle

Can be understood as a scroll guide.

The steel ball is infinitely rolling between the slider and the guide rail, so that the load platform can easily move linearly along the guide rail with high precision, and the friction coefficient is reduced to one-fiftieth of the conventional sliding guide.

It can easily achieve high positioning accuracy.

The design of the slider and the guide rail end unit make the linear guide rail can bear the load in all directions, such as up, down, left and right.

The patented recirculation system and streamlined structural design give HIWIN’s linear guides smoother, quieter motion.

Slider – Turns the motion from a curve to a straight line.

The new rail system allows the machine to achieve fast feed rates.

In the case of the same spindle speed, rapid feed is a feature of linear guides.

Linear guides, like flat guides, have two basic components;

One is a fixed component as a guide and the other is a moving component.

Since linear guides are standard components, for machine tool builders.

The only thing left to do is to machine the parallelism of the plane of the mounting rail and the alignment rail.

Of course, in order to ensure the accuracy of the machine tool, a small amount of scraping of the bed or column is essential.

In most cases, the installation is relatively simple.

The guide rail as a guide is hardened steel, which is finely ground and placed on the mounting plane.

Compared to planar guides, the geometry of the cross-section of a linear guide is more complex than that of a flat guide.

The reason for the complexity is that grooves need to be machined on the guide rail to facilitate the movement of the sliding member.

The shape and number of grooves depends on the function that the machine has to perform.

For example, a rail system that withstands both linear forces and subversive moments is quite different in design from rails that only accept linear forces.

The basic function of the fixed element (rail) of the linear guide system is like a bearing ring, a bracket for mounting a steel ball, and the shape is a “v” shape.

The bracket wraps around the top and sides of the rail.

In order to support the working parts of the machine tool, a set of linear guides has at least four brackets.

Used to support large work pieces, the number of brackets can be more than four.

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