6
VLBG
3.4.3 Assembling the bolt for
VLBG M12-M48 / 1/2“ - 2“
HINT
Only the stated strength of class for the
respective size of the bolts must be used!
1. Insert the bolt into the bushing at the tapered end,
where the chamfer is (refer to Pic. 9).
Pic. 9: VLBG in sectional view. The insertion
chamfer is visible on top of the bushing
2. Insert the bolt into the socket in such a way that
the retaining ring is circumferential deepened in
the socket and seated (refer to Pic. 10).
TIP
Turn the bolt a few times under slight pres-
sure so that it is centered in the retaining
ring!
Pic. 10: Retaining ring positioned as circumferential
in the recess
3. Use a light tap on the head of the bolt so that the
bolt can be assembled up to the end stop of the
bolt head on the socket.
4. Finally, control the tightness and seating of the bolt.
The bolt must be easily rotatable by 360°.
4 Inspection / repair
4.1 Hints for periodical inspections
The operator must determine and specify the nature
and scope of the required tests as well as the periods
of repeating tests by means of a risk assessment (see
sections 4.2 and 4.3).
The continuing suitability of the anchor point must be
checked at least 1x year by an expert.
Depending on the usage conditions, f.e. frequent
usage, increased wear or corrosion, it might be nec-
essary to check in shorter periods than one year. The
inspection has also to be carried out after accidents
and special incidents.
4.2 Test criteria for the regular visual inspection
by the user
• Correct bolt sizes and nut sizes, bolt quality and
screw-in lengths
• Always observe tightness of the bolts
––> inspect the torque
• Comprehensiveness of the lifting point.
• Comprehensive, legible load-bearing information
as well as the manufacturer’s identification mark.
• Deformations on load-bearing parts such as basic
body, hanging or hooking in suspension ring and
bolt
• Mechanical damage such as significant notches,
parti cularly in areas subject to tensile stress.
• Easy rotation of the VLBG must be ensured
4.3 Additional test criteria for the
competent person / repair worker
• Cross-section alterations caused by wear > 10 %.
• Strong corrosion
• Cracks on load-bearing parts
• function of and damage to the bolts, nut as well a
the screw thread (disassembly / assembly of the
bolt see section 3.4).
• further checks may be required, depending on
the result of the risk assessment (e.g. testing for
cracks in load-bearing parts).
