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SKF Precision Rails Cage Guides Constrained
SKF Linearsysteme has revised its Anti-Creeping-System (ACS), which counteracts troublesome cage creep. The new version ensures higher precision and system rigidity at the same time improving operating characteristics and reliability. The internal geometry of the constraining guide for the cage has been optimised.
The entrainment of the cage elements is provided by an involute gear and a straight tooth gear fit with high vertical coverage.Also new is the use of corrosion resistant steel.
Since the introduction of the patented ACS, SKF Linearsysteme has been repeatedly asked for precision rails with constraining cage guides.Larger production batches have not only opened new possibilities in the production logistics, it also led to a new examination of the basic construction of the ACS-Precision Rail Guide.
With the previous construction, there was always a groove between both tracks.With the new version ACSM, the constraining guide for the cage is directly integrated between both tracks so that there is sufficient room for a reliable module gearing.
In using this development there is no weakening of the track prism and it considerably increases the rigidity in the rail-bearing-rail system.The involute gear ensures the entrainment of the cage, provides a faultless, clean and low friction run over the complete life cycle of the precision rail.
The present test results in respect of the dynamic values speak for themselves.These tests showed that over 20 million cycles, with an acceleration of 16G and a maximum speed of 3.2m/s produced no failure or recognisable traces of abrasion.The tests were carried out with a decentralised mounted mass and a dissimilar preliminarily rail tension.
Without the use of a constraining guide the loading would undoubtedly have led to the cage creeping away from the load zone.Also new is the use of corrosion resistant steel, which now allows the precision rails to be used in problematical industrial processes such as in vacuum technology, the food industry, the chemical industry and in medical technology.It also means that the rails can be used in tropical countries where they are protected against damp and humid conditions.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| ZARN4075TN bearing | 40 | 75 | 54 |
| ZARN3062TN bearing | 30 | 62 | 50 |