SCHNEEBERGER linear guideway systems are widely used in precision machinery of every kind. The following examples illustrate typical fields of use and how the right linear guideway can be selected for a specific application.
Linear guideway for a tool grinding machine table
Precision-grinding on tool grinding machines requires a stick-slip-free and frictionless guideway to allow longitudinal movement of the table.
Possible SCHNEEBERGER products:
- 4 linear guideways type R 9-800
- 2 roller cages AC 9 x 33 rollers
- 8 end pieces GA 9, GB 9
Table bearing for an internal cylindrical grinding machine
Internal cylindrical grinding robots require absolutely zero-backlash table guiding in order to meet the stringent requirements of today's grinding technology.
The grinding table displayed is mounted with type N/O linear guideways whose V-shaped needle cages are connected to an oil impulse lubrication system. This creates the conditions needed to control high table speeds with minimal force applied.
Possible SCHNEEBERGER products:
- 2 linear guideways type O 2535-1'000
- 2 linear guideways type N 2535-1'000
- 2 needle cages HW 20 x 725
- 4 end pieces GH 2535 without wipers
Open configuration (floating bearings) for heavy surface grinding machine
Surface-mounted roller guides then come into play particularly when large and heavy workpieces are being machined. The weights of table and workpiece and the grinding pressure have a vertical action on the roller guides.
Cost-effectiveness, simple assembly and a high level of running accuracy characterise this configuration. Expansion of the table resulting from the effect of heat without limitations is also prevented thanks to characterise expansion options.
Its construction is simple and cost-effective. The N/O linear guideway assumes the task of being the lateral linear guideway for the table. As the surface guideway is adjusted level with the N/O, the linear guideway systems can be interchanged - depending on whether the grinding spindle is mounted to the right or left.
Possible SCHNEEBERGER products:
Configuration A:
- 1 linear guideway spec. 45 x 35 x 600-EG (1)
- 1 linear guideway spec. 45 x 42.5 x 1'000
- 1 roller cage H 25 x 810 mm
- 2 end pieces special
Configuration B:
- 1 linear guideway type N 3555-600-EG (1)
- 1 linear guideway type O 3555-1'000
- 1 needle cage SHW 30 x 810 mm
- 2 end pieces GW 3555
Closed V guideway for surface grinding machines
Economic perspectives also determine the structural design of the tables guideways for surface grinding machines. The V-shaped arrangement of the roller guideways creates a closed linear guideway that can be loaded for forces and moments from all directions.
The few components ensure rapid and simple assembly. The stroke and table length ratios are optimal for the use of roller guideways. The basic surfaces of the roof-shaped linear guideways can be machined with extreme efficiency and precision because they are on the same plane. These surfaces also form the basis for achieving high levels of running accuracy.
Possible SCHNEEBERGER products:
- 2 linear guideways N 3045-900
- 2 linear guideways O 3045-900
- 2 needle cages SHW 25 x 730 mm
- 8 end pieces GF 3045
V guideway for heavy tool grinding machines
Tool grinding machines place very high demands on the roller guideway system of the machine table. High level of running accuracy, minimal friction, stick-slip effect and protected arrangement of the roller guideways are the most important requirements.
The RNG roller guideways used here are ideally suited to this task thanks to their high load carrying capacity. The table construction allows drive mechanisms to be accommodated; the upper part of the table can also be installed with great ease. The preload of the linear guideway system can also be easily set subsequently.
Possible SCHNEEBERGER products:
- 2 linear guideways RNG 9-700
- 2 linear guideways RNG 9-450-EG (1)
- 2 roller cages KBN 9 x 43 rollers
- 4 end pieces GCN 9
Infeed device
The infeed device working in vacuum places high demands on the linear guideway system. A U-shaped support forms the supporting element and also acts as the take-up for the linear guideways. The whole system is made of a non-corrosive material and works vertically with a stroke of 2'700 mm.
Linear guideways, which are assembled in the U-shaped basic component, and 4 type SK rolling elements form the actual guide system. Two of the four rolling elements can be adjusted externally and so support optimal preload setting. All individual components of the rolling elements are made out of stainless steel or aluminium.
Possible SCHNEEBERGER products:
- 4 linear guideways R 9-1400-RF (1)-ZG (1)
- 4 recirculating units SK 9-150-RF (1)
Patient tables
Highly developed, automatic patient tables are used, amongst other things, in computer tomography (CT), magnetic resonance tomography (MRT) or radiotherapy.
All kinematic processes place the highest demands on the linear guideway systems in terms of running accuracy, smoothness, maintenance-free operation, rigidity, ease of installation and radiation resistance.
Possible SCHNEEBERGER products:
- R 9 linear guideways
Microtome
Microtomes are cutting devices used to create wafer-thin sections. They are used for microscopic preparations (for example, biological tissue) or analysis of plastics.
Biological material is normally hardened before being cut by means of fixing and then made sliceable by means of «embedding», i.e. inclusion with a fluid substance such as paraffin or synthetic resin. The thickness of the slices is significantly smaller than the diameter of a human hair and is typically around 1 to 100 µm.
Due to these extraordinary requirements, the most stringent demands in terms of smoothness and precision are placed on the linear guideway systems.
Possible SCHNEEBERGER products:
- RNG 4 linear guideways
(1) see chapter 7