FAQ’s – Linear Bearings

What clearance do Franke linear guides have?

Franke linear guides are factory set free from clearance.

If the respective load situation requires this, the clearance can be subsequently adjusted by using an integrated threading pin.

How can Franke linear guides be prevented from dirt?

Wiper (Standard)
Metal Wiper
Bellow

What speed and acceleration can be reached?

With Franke linear systems, travel speed up to 10 m/s and accelerations up to 40m/s² can be reached.

What requirements have to be fulfilled by the assembly space of the linear guides?

	Size 12-20 [mm]	Size 25-45 [mm]
Max. tolerance for parallel run	0,03/m	0,05/m
Max. evenness of screw-on surface	0,05/m	0,10/m

Do Franke linear guides have to be maintained or relubricated?

Franke Linear Systems are low-maintenance and have factory-fitted lifetime lubrication.

Relubrication is not necessary, apart from the ball screw. Relubrication may be necessary – depending on the use – resulting from leakage of grease via the spindle shaft.

We recommend relubrication with approximately 1 – 2 g grease in intervals of approximately 700 operating hours.
If necessary you should clean the insides and the guide tracks and coat them with grease.

In case of a broad temperature (e.g. -20 to +80°C), on which slide resistance does the cassette have to be adjusted?

The slide resistance depends on how long the linear guide is running in certain sections.
The corresponding travel speed is also important.

For a precise definition of the slide resistance please contact our technical support.

Can the cassette also be screwed from the bottom?

This can be achieved by a rework at the bottom of the cassette.

Please get in contact with our technical support for more detailed information.

What data is required for the design of a linear guide?

The following parameters are required to correctly design the guides:

Selection of arrangement
All prevalent forces/moments (dynamic/static)
Load type (resting, expanding, alternating)
Ambient influences (e.g. temperature, moisture) or special operating conditions (e.g. clean room, vacuum)
Travel speed and acceleration
Stroke length
Target service life in km

All prevailing forces and moments must be within the specified limits.

Are Franke linear guides compatible to the products of other market players?

In most cases, the dimensions and the drilling pattern are similar or even identical. However, the load ratings can differ.

For an examination of the compatibility, please send the name of the manufacturer as well as the designation and a drawing
of the rail to our technical support.

The dimensions of the rail will then be compared to our cassettes.

We will be pleased to prepare a lifetime calculation for you.