3 Special characteristics
The product concept for BZ MONORAIL guides provides for the manufacture of one-piece section rail guides with integral racks up to 6 metres in length. These one-piece modules can be linked together to make axes of any length.
A prerequisite for this is that the butt transition joints are machined in a process specially developed for this purpose. The individual parts are installed and aligned using fixtures that are available separately.
Special cross-members are available for the safe transportation of the long individual rails. These aluminium trusses are designed to remain attached to the component while the toothed rail is installed and aligned and only finally removed after the latter has been finally fixed in place. This ensures that the rack can be safely transported, fitted and aligned without suffering any deformation.
In comparison to other screwed systems, BZ has a large number of connections between the rack and the guide rail thanks to the use of BM MONORAIL guides with fixing holes spaced half the normal distance apart. This means that very high lateral forces can be absorbed and compact designs with a high power density are possible.
For details see SCHNEEBERGER application catalogue.
Tooth quality
SCHNEEBERGER MONORAIL BZ guideways are fitted with integral racks. The gearing used is specially designed for machine tool applications. 19°31′42″ helical gearing using module 2.5 and module 2.0 is employed to reduce noise and to achieve smooth running. Dependent on customers' requirements, the teeth can be formed in two different qualities.
For details see SCHNEEBERGER application catalogue.
Order code
| Order code | Tooth quality |
|---|---|
| Q5H | DIN quality 5, hardened and ground |
| Q6S | DIN quality 6, soft, milled |
Comparison with other drive systems
Compared with other drive solutions used for linear movements, rack drives with BZ MONORAIL offer a number of benefits. Where ball screws are concerned, these are a way of implementing several independent movements on a guide system.
BZ MONORAIL has a superior drive rigidity, which is independent of the length of the axis and independent of temperature thanks to the modular style of construction.
The rack elements are partially exchangeable when worn.
Accurately machined section rail guides and exceptionally precise rack segments result in a very smooth running pinion. The preload of the drive system thus remains constant along the full length and does not change in operation over time. In combination with suitable motors or gearboxes, self-locking vertical drives can be implemented in the event of power failure.
In comparison to linear motors, BZ MONORAIL systems represent an economical and simple alternative that offers a high degree of efficiency. They are the ideal solution when machining a wide range of materials on long axes and in the face of adverse operating conditions.
General technical data
General technical data q.v. chapter 2.1 Technical Data Guiding.