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The Designer Series & P7 Industrial
3.8 adding tension to spring
WARNING! Torsion springs can cause serious
injury. DO NOT underestimate the tension in
the spring.
WARNING! FRAME ONLY DOORS must be
tensioned after the cladding is installed for
springs to adjust to the new weight.
WARNING! Keep hands clear of the spring
and the spring winding plug at all times.
The number of turns required for each spring is shown
on a paper tag attached to the springs. Fig 3.8.1
a) Secure the torsion bar using 2 pipe wrenches, as
shown in Fig 3.8.2.
Fig: 3.8.2
Doors with total weight over 200kg require
850mm
+
long winding bars. These can be
tip
purchased from B&D (p/n 0T05480-1).
b) Turn the spring by inserting winding bars into the
plug holes of the spring and wind up in the direction
towards the opening. Fig 3.8.3.
WARNING! Always have one winding bar
engaged and firmly held while turning and
tightening screws.
c) Once you have completed the turns required,
remove one winding bar. If spring snaking occurs,
tap the remaining bar back towards the spring
anchor bracket.
d) Maintain firm tension on the winding bar, while
using a spanner to tighten the two (2) grub screws.
Fig 3.8.4.
Fig: 3.8.4
installation instructions
™
Fig: 3.8.1
grub screw 2
e) Repeat this procedure if there is more than one
grub screw 1
f) Check that all screws are properly tightened before
maintain tension while
tightening both screws
DH 2,650 mm X DW 5,300 mm
Line Item: 30
Turns: 9.62
Diameter: 50.8 X 2 X 9.4
Quantity: 2
Wire Diameter: 6.17 mm
Ref No: XXX
Delivery No: 82059200
Wgt: 12.9 kg
KSPR: KIT SPRING SECTIONAL OVERHEAD DOOR
The label lists how many full turns.
Alternatively, a line is painted along every
tip
spring. If the spring is turned 8 times, 8 lines
can be seen along the spring
8
7
6
always have one hand firmly
holding bar while turning
850mm long winding bars are
needed to safely tension springs
on heavy doors.
CAUTION: Be careful not to
over tighten the grub screws.
spring, remembering to always wind the spring,
whether left or right hand, in an up direction
towards the opening.
removing the wrenches on the torsion bar.
15
5
4
3
2
1
Fig: 3.8.3
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