Atlanta BWL 108e Document Procedure

Abteilung TB/Steinbach
Änd. Index F
Datum 27.02.06
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

63 25 720
63 25 725
63 25 727
63 25 726
63 25 730
63 25 735
63 25 736
63 25 748
00000407584841494444.DOC
D o c u m e n t e d p r o c e d u r e
Operating and maintenance
instructions
Size of ball-screw Dyn. capacity
50x10
50x20
50x20
50x20
60x10
63x20
63x20
80X20
Dimension L
78 kN 60
82 kN 58
96 kN 87
160 kN 84
86 kN 60
85 kN 60
248 kN 141
359 kN 141
BWL 108e
4100-001-12.93
Seite 1
Name Steinbach 12.03.98
freigegeben TB/Lorch 12.03.98
Dimension L1
97
95
122
132
99
99
180
185
2