Advantages of Qi Lei Transmission Cross Roller Guide NV Type

The cross roller guide NV type is a roller cage R type that uses a unique roller retention method to increase the effective contact length of the roller, which shortens the roller pitch interval, and is precisely ground after special heat treatment. The special track V type is combined to have high rigidity. High precision. A small, limited type of direct motion system. 

It is widely used in precision machines such as OA machines and their peripheral machines, various measuring instruments, and printing substrate boring machines, or in sliding parts such as optical testers, optical tables, operating mechanisms, and X-ray devices. 

The ball guide type VB is a ball cage type B that holds a precision steel ball with a short pitch interval, and is combined with a dedicated track V type to have low friction. High precision, limited type of direct motion system. 

Many mechanical designers either want to replace the previously assembled linear guides with cross rails, considering cost considerations, or accuracy considerations, or from installation space considerations. So what are the advantages of cross-rails compared to linear guides? 

The installation height of the cross rail is lower, because the two rails are installed in parallel to form a set, so that the machine of the cross rail is better than the linear rail, and the overturning moment is higher than that of the linear rail. Therefore, the stability of the machine is much higher than that of the linear guide. However, the effective travel of the cross rail is limited. It does not leave much longer than the linear guide. In a limited stroke, the reciprocating linear motion of the cross rail is much higher than that of the linear guide SP. Therefore, it can be said that the accuracy of the cross rail is much higher than that of the linear rail. 

Generally, a set of cross rails is replaced by two linear guide rails, and the cost is not very good. 

In summary, when considering replacing the linear guide with the cross rail, 1 consider the effective stroke, 2 consider the accuracy, 3, consider the installation size. 

Construction and specialty 

The cross roller guide NV type is a combination of a roller cage that combines precision rollers with each other and a 90° V groove rolling surface provided on a dedicated rail. By arranging the two rows of roller guides in parallel, they can withstand loads in all directions perpendicular to the shaft. Further, since the preload can be simply applied, a slide mechanism having no gap and high rigidity and a light movement can be obtained. 

Long life and high rigidity 

Using the unique roller retention method, the effective contact length of the roller is increased by 1.7 times compared with the previous product, and the pitch of the roller is shortened, the number of rollers is increased, and the rigidity is increased by 2 times. Double the life. Therefore, it is possible to fully consider the design of the vibration and the shock which are likely to occur in the straight moving portion. 

Smooth motion 

In the cross roller guide NV type, each roller is separated by the cage. Since the roller bag in the cage is in surface contact with the roller and has good lubricating oil retainability, there is no wear and little friction, so that it can be obtained. Smooth rolling motion. 

Excellent corrosion resistance 

Cross-rail NV guides are available in stainless steel with excellent corrosion resistance.