Linear Roller Guides
Tschudin & Heid linear roller cages restricts radial movement under heavy loads.
Tschudin & Heid introduced its linear roller cages and guides that allow the displacement of moving parts in an axial direction through the use of parallel shafts and sleeves. The use of special “rollers” instead of balls results in line contact with the guide rather than point contact as with ball-type guides, which restricts any radial movement. Because of this line contact, pre-load at assembly can be kept low, which produces a low surface pressure between the rollers and guides. Inspite of this, the bearing is rigid, accurate and can be heavily loaded. The rollers are arranged within a plastic or metallic cage in spiral fashion, spread over the entire surface area of the shaft and sleeve. According to the company, the low maintenance unit requires a thin lubricating film for normal operation.