BWL 108e
D o c u m e n t e d p r o c e d u r e
4100-001-12.93
Abteilung
TB/Steinbach
Seite
1
2
Änd. Index
F
Name
Steinbach
12.03.98
Datum
27.02.06
Operating and maintenance
instructions
freigegeben TB/Lorch
12.03.98
00000407584841494444.DOC
ATLANTA ball-screw gripping nut with cut-off
Variants
1. Ball-screw gripping nut without ball-screw supporting nut
2. Ball-screw gripping nut with ball-screw supporting nut
3. Ball-screw gripping nut with ball-screw supporting nut and safety sleeves
Functional description
The gripping nut must be located in load direction behind the supporting nut. It features the counter
profile of the ball-screw spindle. During normal operation it is centred on the ball-screw supporting nut
and moves along without contact. It becomes engaged only when the balls get lost out of the ball-
screw nut. Then the spindle is pulled through the ball-screw nut and the gripping nut is pressed
against the supporting nut thus triggering the limit switch and cutting off the drive.
The sleeves in the bores of the ball-screw nut are safety elements especially for set-up purposes.
During normal operation the drive is cut off by means of limit switches provided at the lifting table or at
the respective plant before the table or the plant reaches its mechanical end position. When during
set-up operation these limit switches are inoperative it is possible to move up to the mechanical end
position, i.e. until it blocks, which may cause damage to the drive mechanism. Due to the sleeves in
the ball-screw nut the nut can continue to move on the driven spindle for a short distance when the
mechanical end position of the table or the plant is reached. After approx. 5 mm the table/plant is
switched off by the limit switch. Furthermore it is also possible to recognise optically that the nut is still
moving.
Mounting
Variant 1:
The gripping nut is supplied preassembled. For mounting the ball-screw nut the gripping nut must be
screwed upon the spindle. Push the clamping ring over the supporting nut until the dimension L is
reached. Then fix the clamping ring with the clamping screw on the nut. Make sure that the gripping
nut and the spindle move without contact.
Quality of clamping screw: 10.9 or 12.9
Stud torque: 14 Nm with torque spanner
Secure the screw with Loctite 243.
Mount the limit switch with support as shown on the drawing on the next page observing the
dimension 1 mm, and check whether the roller is positioned in the middle of the groove. If necessary,
loosen the clamping ring and adjust the position of the supporting nut.
Order code
Size of ball-screw
Dyn. capacity
Dimension L
Dimension L1
63 25 720
50x10
78 kN
60
97
63 25 725
50x20
82 kN
58
95
63 25 727
50x20
96 kN
87
122
63 25 726
50x20
160 kN
84
132
63 25 730
60x10
86 kN
60
99
63 25 735
63x20
85 kN
60
99
63 25 736
63x20
248 kN
141
180
63 25 748
80X20
359 kN
141
185