The
following is recommended: D TYPE is 16/17mm, F TYPE is 17mm, K Type is
21.5mm and M TYPE is 26/27mm. These measurements relate to width and
depth of groove
The spiral rod's are
made of 430 stainless steel and the torsion springs are made from BS2803
980NS. The reason behind the two materials is that originally D type
standard spiral balances was manufactured, which the metal spiral was
clearly visible and exposed.
Our
balance's realistically cover a minimum weight range of 5 LBS (2.27 KGS)
up to a maximum of 100 LBS (45.45 KGS). If you require a weight range
out of these parameters please contact Balance UK Ltd.
We do
manufacture an equivalent balance within our D type range. All we
require is the length of the tubing alone in inches, what foot
attachment required and also the colour of the plug on the end (White =
D2, Blue/Red/Yellow = D4, Black = D6)
Tension can be removed from the
standard D type spiral balances. Ideally we recommend for more than one
person to complete this job. Simply unhook the balance from the foot
attachment on the sash, and then using a wire tool rotate the spiral
clockwise removing the tension. Once accomplished correct tension
requirement, follow the fitting procedure as per Balance UK Ltd
instructions.
With F & K Balances a small amount of tension
can be removed within its weight range. Ideally we recommend for more
than one person to complete this job. Firstly unscrew restrictor stays
and remove from tilt shoe if necessary. Using the F & K installation
tool pull the balance out of the tube so that the spring is exposed,
then rotate in a clockwise direction 1-2 full turns dependant on
requirement. Once accomplished correct tension requirement, follow the
fitting procedure as per Balance UK Ltd instructions. (Please note for
heavier balances you may need to use a vice instead of the F & K
installation tool)
We use a standard courier
service that delivers within a 1-3 day (9-5pm) time frame, although a
large percentage of the time our customers receive the goods next day
from despatch. We endeavour to fulfil all orders to specified delivery
dates and when not issued the goods would leave us ASAP in relation to
the time of order receipt with sufficient manufacturing time. As a
guideline we recommend reasonable sized orders to be received by 1pm for
delivery next day in UK.
The carriage charges applied are as
follows; £13 UK Mainland, £22 Scottish Highlands, £21 Northern Ireland,
£31 EIRE, £21 Scilly Isles, £22 Isle of Man, £20 Isle of Wight. Charges
to UK mainland orders over £200 on a 3 day carrier are wavered. UK
premium service charges apply; before 10am delivery £30 and pre 12
delivery £20.