THK Linear Ball Guide
THK linear ball guide is driven by the steel ball in the slider, and the steel ball is smaller but the number is larger.
1.What is THK linear ball guide
Strengthening the development of the CNC industry is an urgent task. Today, the competition is so
fierce, the weak meat is strong, and once it can't keep up, it will be eliminated. Especially foreign
technology is so advanced, so we can't stop the pace, otherwise it will be overwhelmed. At this stage,
the application of linear slides for machine tool components is inevitable, and problems will inevitably
occur. Therefore, we need continuous improvement and optimization. Today I will lead you to the new
THK linear ball guide.
The THK linear ball guide replaces the steel ball with a rolling element as a rolling element. This is a
principle mode designed to achieve ultra-high rigidity and heavy load capacity: rolling is achieved by
rolling contact between the sliding rail and the slider. The body will only produce slight elastic
deformation when subjected to high loads. Through the realization of ultra-high stiffness, the machining
accuracy is greatly improved, thereby achieving high precision requirements. Taking into account the
heavy load characteristics of the linear slide, the service life of the linear slide is extended.
The return module of the THK linear ball guide has obtained many national patents at this stage, and
the rolling ball-shaped rolling body can smoothly perform infinite circulation motion. And the use of
advanced finite elements to analyze the structural strength, thus summarizing the optimal design of the
structure between the slider and the slide.
The THK linear ball guide can withstand loads in the up, down, left and right directions, making the
linear slides capable of exceeding high loads. Because linear guides and ball-type linear rails have a
small volume under the same load conditions, they can withstand the ability to exceed the load.
2.THK linear ball guide has good load bearing capacity
The THK linear ball guide is mainly composed of main components such as guide rails, sliders, ball
bearings, retaining rings, end caps, baffles and gaskets. The holder is mounted between each sphere and
is equally spaced. End caps are located at the ends of the slider to provide reflow, chip removal and
lubrication. The baffle is divided into upper and lower baffles to function as fixed ball bearings; the
gasket includes end faces, side faces and internal gaskets for dust protection.
During operation, the slider reciprocates linearly along the guide rail, and the rail surface and the
rail surface between the balls maintain the maintenance characteristics of the runway maintenance
personnel under continuous circular motion, thereby achieving relative motion and guidance between
The THK linear ball guide is a new type of reciprocating linear motion rolling bearing. Rolling
friction instead of sliding friction avoids direct contact between the rail and the slider, avoiding rolling
between the rail and the slider.
The friction coefficient of the THK linear ball guide is about -1 of the sliding guide rail, which not
only improves the moving speed of the slider, but also ensures the running accuracy of the slider and
prolongs the service life of the THK linear ball guide. When the preload is applied, the gap can be
eliminated and the rigidity accuracy can be improved. It has the function of automatic centering and
automatic compensation of the mounting base error.
Due to its high overall running accuracy, it can be made into high-precision, high-performance
machinery. In addition, due to the linear rolling guide pair has a good correction and leveling function.
The bearing retention point THK linear ball guide has good bearing performance and can withstand
forces and torque loads from top to bottom, left to right, top to bottom, left to right, and rolling torque.
Therefore, it has good load adaptability. Appropriate preloading in design and manufacturing can
increase damping, improve vibration resistance, and eliminate high frequency vibration.
3.THK linear ball guide also has good interchangeability
It is easy to form standardized and serialized, which can be produced by professional manufacturers
in batches, which is convenient for users to choose and shorten design time.