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