Linear Motion


Product Series Description

 
Linear Roller Ways

The unsurpassed and highly acclaimed heavy duty LRX series features ultra high rigidity and very smooth travel using four rows of cylindrical rollers.


 
Linear Ways

Four series in the range include the LWL miniature series, the LWU series whose U-shaped structural channel slide rail can span considerable distances, the interchangeable LWH series of large capacity slides and rails and finally, the LWF series offering high rigidity on a wide rail with unlimited travel distance.



Linear Ball Splines

A range of cylindrical slide units running on a grooved bar rail. As with all IKO products, the LBSG series can be used in single or multi-rail configurations to increase load capacity and torsional stiffness.



Mechatronics

Two series of highly accurate tables. The TU positioning table for example accurately transfers rotary motion to linear motion by pushing or pulling a slide along a rail on large diameter ball raceways. A linear threaded bar runs along the channel rail and passes through the slide unit which is 'captured' by the rail. As the bar rotates, the slide travels along the thread and rail.



Crossed Roller Way

A range of three series, the CRW, the CRWM and the CRWU, all of which are available in a variety of size and configuration options with cylindrical rolling elements. As with all IKO products, manufacturing tolerance is in the sub-1 micron region, giving exceptional accuracy and performance.



Precision Linear Slide

This four series range, the BSP, the BSPG, the BSR and the BWU series of compact and lightweight linear guides offers many variants to suit a broad range of applications. The tiny BSP series for example offers an exceptionally high performance and stability to size ratio.

Linear rolling bearings
Linear rolling bearings are available as monorail guidance systems, track roller guidance systems, shaft guidance systems with linear ball bearings, flat cage guidance systems, guidance systems with linear recirculating roller or ball bearing units and as driven units (actuators and tables). Furthermore, INA also manufactures special miniature guidance systems for small design envelopes such as those in mechatronics and precision engineering. These very compact elements with very high load capacity, low friction and high rigidity are available as cage or recirculating systems. Due to their compact design, they can often replace solutions requiring significantly greater space.
The guidance systems comprise a guideway/carriage unit, a linear bearing/shaft system or are guideway/guideway units with roller or ball flat cages between them. Driven linear units are single-axis or multi-axis complete systems with a mechanical guidance system, an electric motor and a controller matched to the system.
Linear guidance systems are ready-to-fit locating bearings predominantly for unlimited stroke lengths. Flat cage guidance systems and linear guidance sets are, with a few exceptions, used for restricted stroke lengths due to the cage kinematics. The bearings support forces from all direction - except the direction of motion - and moments about all axes. Shaft guidance systems with linear ball bearings are suitable for loads from two directions and can compensate for static shaft misalignment. For the high rigidity and accuracy often required in operation, most units are supplied ex works preloaded or can be preloaded at fitting. Due to the various accuracy and preload classes, applications can easily be realised with high guidance and positional requirements.
In order to determine the size of guidance system, attention is paid primarily to the magnitude and type of load and the requirements for operating life and operational reliability of the bearing arrangement. In general, roller bearings can be subjected to higher loads than ball guidance systems of comparable external dimensions. Ball guidance systems are therefore normally used for small to moderate loads and highly dynamic motion, while roller guidance systems are used for high loads. If particularly high loads must be supported, flat cage and recirculating roller guidance systems are particularly suitable.
Linear plain bearings
While in rolling bearing arrangements the bearing elements are separated by rolling parts (the rolling elements), in plain guidance systems the movable component slides on a static guideway or shaft. Depending on the type of guidance system, the sliding layer is applied to the movable or the rigid component. Lubrication is carried out by means of lubricants embedded in the sliding layer.
Linear plain bearings are linear locating bearings for unlimited stroke lengths. These linear guidance systems are available as a miniature plain guidance system, Permaglide linear plain bearings and Permaglide linear plain bearing units as well as a flat guidance system. Miniature plain guidance systems comprise a guideway/carriage system with a maintenance-free sliding layer, Permaglide linear plain bearing units with a low-maintenance Permaglide bush seated in a light metal ring. Flat guidance systems are guideway systems in which the sliding surface is provided on the guideway by means of a low-maintenance sliding layer.
Plain bearing guidance systems have low wear and high static load capacity, are insensitive to shocks and contamination, make little noise and operate substantially free from stick-slip. Maintenance-free plain guidance systems do not require lubrication, and low-maintenance materials have good emergency running characteristics. Due to their versatile specific characteristics, plain guidance systems are used in many areas, especially where the bearing position must be maintenance-free or low-maintenance, there is a risk of inadequate lubrication or where lubricant is either undesirable or impermissible.
The life of a linear plain guidance system depends essentially on the load, sliding speed, temperature and operating duration. There are additional limiting factors including contamination, corrosion in dry running or possible ageing of lubricant if lubrication is not sufficient. The basic rating life is therefore only ever a guide value.
Many external influences on linear plain bearings cannot be included in calculation. Tests under operating conditions therefore give the most reliable information on the use and life of the guidance system in the specific application.

Linear rolling bearings and linear plain bearings