Version R - Danaher Motion THOMSON NEFF MULI Series Mounting And Maintenance Instructions

4.4.2

Version R

The safety nut (1) is positioned below the travelling nut (2) without axial load and is therefore
not subject to wear. As the travelling nut wears, the distance (measure X) between the two
nuts decreases.
Fig. 9: Compressive load
No.
1
2
X
The travelling nut must be replaced when the axial backlash with a single-start thread
is more than ¼ of the thread pitch (= measure X). Otherwise safety can no longer be
guaranteed.
If it wears more than ¼ of the thread pitch, it might cause potential dangers to people
and objects. Therefore, the measure X must be regularly checked.
A wear check without prior disassembly is possible.
In case of break of the thread of the travelling nut, the safety nut will take over the
load.
® ®
MULI - JUMBO
Name
Safety catch nut
Running nut
Dimension for axial clearance
08/05
Fig. 10: Tensile load
Assembly
37