NTN-SNR AXC100Z, Manual

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Table 4.8 ____ Degrees of pollution for Linear axis
4.7 Lubrication intervals
Delivery condition
NTN-SNR Linear Axis have already an initial lubrication on delivery. After assembly, the Linear Axis should be lubricated by the in the
operating manual described lubrication points with the amounts indicated in the operation manual. For an optimal grease distribution
in the system, this process should take place in two to three steps with intermediate movement over a longer stroke.
When restarting a system after a prolonged shutdown, a relubrication with the double amount of lubricant which is specified in Capter
4.6 is recommended.
When the lubricant is changed at any time during the operation of the system, the miscibility of the lubricants must be absolutely tested.
Influence factors
The lubrication intervals are influenced by many factors (Chapter 4.1). The biggest influence usually has the load and the existing
contamination. The exact lubrication intervals can only be determined after testing under real operating conditions and assessment
over a sufficiently long period for the specific application.
Special application conditions
For special applications (for example, food industry) other lubricants can be required. The re-greasing interval is dependent on many
factors such as contamination level, operating temperature, load, etc. Therefore, the information contained herein are values for orientation.
Linear guides for the series AXC, AXF, AXDL, AXLT, AXLM and AXS
The lubrication intervals of the linear guides are shown in the diagram in Figure 4.10, depending on the contamination. For Linear
Axis with inside placed guiding systems the lubrication intervals form one degree of pollution lower could be applied. In Table 4.8 the
corresponding protection options are summarized for the different degrees of pollution.
Degree of pollution Application area Possible protection option
Without pollution - Clean rooms
- Laboratories
- very clean working areas
Cover strip
Low level of pollution - Assembling areas with very low occurence of dust
and dirt
Without
Medium level of pollution - Assembling areas with higher occurence of dirt
- Production halls
- Cover strip - Cover plate
- Bellow
Strong pollution - Production areas with massive
exposure to dust, chips, cooling lubricant…
- Cover strip - Side seals
- Sealing air connection - Felt wiper
Figure 4.10 __ Re-lubrication interval of linear guides
Strong pollution
Medium level of pollution
Low level of pollution
Without pollution
0 500 1 000 1 500 2 000 2 500 3 000 3 500 4 000 4 500 4 000 5 000 5 500 6 000 6 500 7 000 7 500 8 000 8 500 9 000 9 500 10 000
250
200
150
100
50
0
Travel distance [km]
% o
f t
he d
yn
am
ic l
oa
d c
ap
ac
ity
As the lubricant manufacturers give no general guarantee for the service life time of their products, we recommend at low kilometerages
a regreasing interval of at least once a year.
If necessary, longer lubrication intervals are possible, after consultation with the lubricant manufacturer for a defined application.
For re-lubrication, mineral oil-based lithium soap greases KP2-K according to DIN 51825 and NLGI class 2 are to be used, otherwise
the compatibility must be checked.
Greases containing solid additives (for example, graphite or MoS
2
) shall not be used.