Jena Tec SBI Range Improves Linear Guide Performance

Compared to conventional linear rail cross sections, the SBI range is approximately 10% lower in height with a wider through section of nearly 20%. Its improved lower cross sectional centre point offer greater structural rigidity, improved straightness during manufacturing and therefore a higher level of straightness in application which benefits the customer for smooth running. Heat treated to HRC60 the SBI range is extremely stable and shorter cross sectional areas mean grinding time and plastic deformation are reduced.

Similarly, Linear blocks are constructed from a hardened steel rigid structure with the same lower cross section centre as the rail and slightly longer block length meaning a greater number of balls with a smooth circular angular motion. This improved track profile and angle results in a smoother and quieter operation.

Standard across the range of SBC products is the heat and chemical resistant end plate with moulded return systems and a self aligning retained designed to ensure the end plate is correctly fitted in line with the main steel block. Despite an increased load carrying capability the additional length attributable to the SBI range is approximately only 3-4 mm longer than standard types dependant on carriage model made possible by an improved end plate design. When considering the advantage of 40% increase on load, the additional length is very modest.

Upper and bottom retainer plates fitted to each block ensure that loose steel balls are eliminated as well as skidding and poor rolling performance within the load zone. Additionally, this benefits the cleanliness of the block by preventing ingress of foreign substances. Advocating a simple design philosophy, the SBI retainers are snap assembled and self aligning. The moulded return plate contributes to the smooth running operation of the SBC range as well as keeping running noise low.

The SBI range achieve this through an improved contact angle of 52% versus the industry standard of 53%. The lower radius of curvature provides a broader contact surface compared to the relevant ball size possible and therefore improves the rigidity.
The improved angular ball re-circulation system with 4 row 2 point contact and 45 degree angular orientation ensure that excellent rolling performance is maintained with low noise even at all grades of pre-load.