Maintenance Intervals And Lubricant Quantities - NTN-SNR AXC Series Operating Manual

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Maintenance intervals and lubricant quantities

Linear ball rail system
With various test conditions, it was established that the calculated life span can be achieved with initial
greasing.
Because the lubricant manufacturer does not guarantee a general service life for its products, we recommend
a relubrication interval of 10,000 km of linear travel or once per year.
Longer relubrication intervals are possible after consulting the lubricant manufacturer for a defined application,
if necessary. A petroleum-based lithium soap roller bearing lubricant should be used for relubrication;
otherwise, the compatibility must be reviewed.
Lubricants with a solid lubricant percentage (e.g. graphite or MoS2) may not be used.
Other lubricants can also be specified for special applications (as example food industry).
Because relubrication interval depends on several factors, e.g. degree of soiling, operational temperature,
load, etc., the information stated here should only serve as a guideline.
Roller bearing
We recommend a lubrication interval of 5,000 km or once a year. Oil to be used: ISO- VG460.
Ball screw drive
Standard lubrication requirements for rolling bearings apply for ball screw drives. Lubrication loss is greater
than with conventional rolling bearings due to axial movement between the shaft and the screw nut. Grease-
lubricated ball screw drives have the advantage of only needing relubrication after long travel, meaning that
a relubrication device can be omitted in many cases. The lubrication amount should be measured to ensure
that hollow spaces are approximately halfway filled. All high-quality roller bearing lubricants are suitable for
use. Please observe lubricant manufacturer guidelines!
Lubricants with a solid lubricant percentage (e.g. graphite or MoS2) may not be used.
If you wish to achieve as long of a relubrication interval as possible, greases pursuant to DIN 51825 K2K and
pursuant to DIN 51818 for higher loads KP2K of NLGI class 2 should be favoured
Relubrication intervals for NLGI 2 lubricants:
d
nenn
≤ 40 mm
Boundary conditions
Load ≤ 0.2 C
Temp = 80° C
max.screwnut
Because relubrication interval depends on several factors, e.g. degree of soiling, operational temperature,
load, etc., the information stated here should only serve as a guideline.
Trapezoidal thread
Lubrication interval 10 to 20 km.
Lubricant as for linear axis. For AXC, a special lubricant with MoS2, or PTFE may also be used, but these
may not get into the lubrication connection "F" for the linear axis.
Travel (km) with pitch P=
5 10 16
250 500 800
N = 100 min-1
min
Temp
Cont.screwnut
snr-mail@ya.ru Тел.: (499) 703-40-50
20 25
1000 1250
= 60° C
21
32 40
1600 2000