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5
Installation and Adjustment Guidelines
5.6. Tightening Torques for the Fastening Screws
5.7.
Lubrication of MINISCALE PLUS
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The recommended torque values can be found in the table. These values apply to
oiled screws.
The friction coefficient μ can be reduced by up to half when using greases
containing MoS2. The corresponding torque values should be reduced by half.
The following table shows the torque values for the fastening screws of strength
class 12.9 (friction coefficient 0.125) and of the strength class A2-70 (friction
coefficient 0.2) in accordance with DIN 912:
Thread size
M1.6
M2
M3
M4
If MINISCALE PLUS or MINIRAIL carriages are used on a guideway, all carriages
are lubricated during manufacture (with KLÜBER Isoflex NBU15). Regarding
subsequent lubrication, refer to the guidelines for MINISCALE PLUS.
5.7.1
Subsequent Lubrication Intervals for MINISCALE PLUS
The subsequent lubrication interval depends on many variables, e.g. load, working
environment, speed, etc. and therefore cannot be calculated. The lubrication point
must therefore be observed over a longer period of time.
For subsequent lubrication, use only grease (Klüber Isoflex NBU15).
A film of grease should be applied to the tracks of the guideway using a lint-free
cloth. The carriages should then be moved along the entire length of the rail so that
the lubricant is applied to the ball bearings and distributed along the guideway. The
grease should be applied sparingly in order to ensure no lubricant gets into the
measuring system optics.
The surface of the guideway must then be cleaned, and the dimensional scale
wiped over with white spirit or rubbing alcohol so that it can be read by the sensor.
Tightening torque in Ncm
Strength class 12.9
28
60
210
500
Strength class A2-70
20
30
110
260
13
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