www. gerlif ng.com
Unit 1,
'ƌĞĞŶƐĮ
eld Industrial Estate,
Willowburn Avenue,
ALNWICK, NE66 2DG
Email: info@ gerli ing.com
www.tigerlifting.com
Page 7
of 18
4.
Chain and Hooks
The hooks and load chains are made of special alloy-steels and are precisely heat -treated. Never weld or heat-treat them
again.
Load Chain
The load chains are exceptionally long -wearing, but wear is unavoidable and certain conditions will cause wear and corrosion
that will lessen the strength . Inspect the load chain for sufficient lubrication , mechanical damage and check for external
defects, deformations, superficial cracks, wear and corrosion marks.
Round steel section chains must be replaced when the original nominal thickness ´d´ on the chain l ink with the worst wear
has been reduced by more than 10% or when the chain
has elongated to a value greater than the discard levels shown in the
tables below. There are two alternative tables for either measuring the chain over 21 links or measuring the c hain over 7
pitches . Chain should be clean, free of twists and pulled taut before measuring.
Measuring the diameter of the chain
d
m
=
d
1
+ d
2
2
Replace the chain if d
m
0.9 × d, where d is the normal diameter of the chain wire .
Measuring over 21 links
Capacity (tonnes)
Diameter of Chain
Wire dØ (mm)
Discard if Diameter of
Chain Wire dØ (mm)
Dimensions of Chain
(mm) (dØ x P)
Discard if 21 links
(mm)
0.5/1.0
6.3
5.7
6.3 × 19
421 .6
1.5/3.0t twin
7.1
6.4
7.1 × 21
467 .4
2.0/5.0
8.0
7.2
8 × 24
533 .4
Measuring over 7 pitches
Capacity (tonnes)
Diameter of Chain
Wire dØ (mm)
Discard if Diameter of
Chain Wire dØ (mm)
Dimensions of Chain
(mm) (dØ x P)
Discard if L (mm)
0.5/1.0
6.3
5.7
6.3 × 19
137.0
1.5/3.0t twin
7.1
6.4
7.1 × 21
151.5
2.0/5.0
8.0
7.2
8 × 24
173.5
28/12/2017
ш
ч
ш
ч
www. gerlif ng.com
Unit 1,
'ƌĞĞŶƐĮ
eld Industrial Estate,
Willowburn Avenue,
ALNWICK, NE66 2DG
Email: info@ gerli ing.com
www.tigerlifting.com
Page 8
of 18
Do not knot the load chain or splice/connect it by using pins, bolts, screw drivers or similar. Do not repair load chains installed
in the hoist. Protect load chain from weld spatter or other damaging contaminants.
Only fit load chains which have been approved by the manufacturer. Non -compliance with this specification will render the
legal warranty or guarantee void with immediate effect. See the Chapter 7 Maintenance for more information on maintenance
of the load chain.
Hand chain
Tiger hand chain is 5mm × 24mm and either galvanised hand chain.
Only fit hand chains which have been approved by the manufacturer. Non -compliance with this specification will render the
legal warranty or guarantee void with immediate effect.
If the unit’s hand chain has been supplied or subsequently fitted with a Tiger hand chain joiner link (HC-050 -JL) make sure
that it has been fitted correctly and is in good working order.
Make sure that the HC-050 -JL has been fitted in the correct orientation as shown in figure 1 below. To achieve this, the
HC-050 -JL stainless steel rivet heads must be facing the front of the chain block and the joiner link must sit vertically within
the hand wheel pocket as seen in figure 2 below:
Figure 1
Figure 2
Regularly inspect the HC -050 -JL. In the event of any defects remove from service and refer the hoist to a competent person for
thorough examination:
•
Wear: make sure that the two stainless steel rivet heads are complete and have not been worn away or corroded,
ensure the rivets are secure and tight a have solid hold of both plates.
•
Damage: ensure the link has not been damaged and that both sides of the link join together to form a flat surface
without any signs of distortion by being: bent, twisted, cracked, corroded or stretched.
If the rivets are to be replaced during inspection or maintenance, the dimensions are 2.4mm ×
6.0mm and must conform to
EN ISO 15983 and the material is stainless steel. These and the joiner links are available as a spare part from Tiger.
Hooks
Do not remove the safety latches from top and/ or bottom load hooks unless you are replacing them with new latches .
Never mark or hard stamp hooks or any other load bearing parts.
28/12/2017
