6STRACK NORMA GmbH & Co. KG · Königsberger Str. 11 · D-58511 Lüdenscheid · Tel +49 2351 8701-0 · www.strack.de
08.2018
ILifting elements
Operating manual -- Safety ring bolts, rotatable SN1598
4. Distortion of the ring caused by excessive lateral
stress
In case of any noticeable distortion, the lifting point
must be decommissioned.
5. Checking the flap function
Check the flaps for distortion, wear and fault-free func-
tioning. Both flaps must be fully functional – it must
be possible to tighten and disassemble the lifting point
by hand. When fully assembled, it must be possible to
turn the ring smoothly (towards the loading direction).
The flaps must be held in position by the spring and
the pins must not be bent.
In case of malfunctioning exchange the flap set.
6. Screw cracking test
Disassemble the lifting point in accordance with the
opera-ting instructions. The screw must be cleaned and
the thread must be checked for damage, distortion and
correct functio-ning (thread gauge). The marking must
be clearly legible and a magnetic surface crack test
must be performed. Smaller cracks on the screw head
may be repaired by filing, grinding etc. Care must be
taken not to reduce the cross-section by more than
10 %. If in doubt, the screw must be replaced.
7. Checking the sleeve
Check the sleeve for distortion and wear. If any doubts
remain regarding functionality or safety of the lifting
point, we suggest to exchange the sleeve or decommis-
sion the lifting point.
Check that all parts have been mounted correctly and
that the lifting point may once again be released for
safe operation.
Service instructions
General information
The lifting point SN1598 operator must perform a
risk assessment test and take measures to ensure the
safe use of the safety ring bolt, including the deter-
mination of the kind of test to be performed on the
safety ring bolt and its scope. STRACK NORMA recom-
mends that such a test is carried out annually by a
qualified person.
Depending on the conditions of use, tests may also
be performed more frequently. In case of frequent use,
we recommend to perform a cracking test every two
years.
To perform this test, the screw must be removed
from the main casting. For regular checks and for the
cracking test, all parts must be free from oil, dirt and
rust. Only choose a cleaning procedure that does not
overheat, cover up surface defects or cause hydrogen
embritt-lement or stress-corrosion cracking.
When performing a test, all parts must be checked
for damages that could impair safety or function;
e.g. breakages, notches, cracks, distortion, improper
heat impact, wear and tear and/or corrosion of more
than 10 % of the cross-section.
If any doubts remain with regard to functionality or
safety, the lifting point must be decommissioned.
Checking
Safety ringbolts SN1598 must be checked as follows:
1. Check that all parts are in their original condition
--- may be seen from the stamping (load capacity,
screw, thread).
Check that the condition of the product upon delivery
has remained unchanged; i.e. no soldering, heat
treatments or surface treatments have been carried
out. Check that the screw has not been shortened.
In all cases, changes must be agreed to determine
whether the lifting point remains suitable for use.
2. Mount the lifting point according to the operating
instructions
Check that the screw-on surface is in full contact with
the mounting surface. If in doubt, check the screw
and the sleeve for distortions or other signs of over-
stressing and exchange if necessary.
3. Distortion of the ring caused by excessive
vertical stress
If the ring exceeds the measure “e” (inside dimen-
sion of the screw head ring), the lifting point must
be decommissioned.
SN1598- e max.
M8 / M10 29.20 mm
M12 34.70 mm
M16 39.10 mm
M20 44.60 mm
M24 55.20 mm
M30 66.00 mm
M36 77.00 mm
M42 79.20 mm
M48 96.80 mm
