TWO EXTRA H/P, NO EXTRA WEIGHT.
Portable
sawmills by name and by nature must be "portable" to survive in the
market. The easiest way to lose this portability is to gain weight. This can
happen in a number of ways, weight can be gained looking for improved features
such as electric start or hydraulics, or it can be gained in model creep such as
can be seen with the latest four wheel drives. This type of development
means a company can lose its original customers as the new bigger and supposedly
better machine is bigger heavier and not suited to its original job. The
original eight inch Lucas Mill ran a 20 H/P pull start engine and the power head
weighed 152Kg. The weight of the power head is important as it is not only the
heaviest component it is the part that has to be moved the most. The Lucas Mill
has minimised this weight by separating the raising and lowering gear from the
engine blade and gear box. The first major upgrade on the model eight came in
1999 with the introduction of the 25 H/P Kohler engine. This upgrade also
included electric start which means a battery had to be added. To just add the
bigger engine and battery would have increased the weight by 15Kg or 10%.
Changing the trolley frame to aluminium kept the weight gain down to just 2 Kg.
The latest upgrade will not increase the weight at all. The new 27 H/P engine is
a development on the 25 H/P engine we have been using up to now. The engine
shares the same displacement as the one it replaces however many parts have been
changed to increase power. The new engine has a larger carburettor for increased
air flow as well as redesigned heads and improved ignition timing. Maximum
torque is now produced at 2800rpm instead of 2400rpm as on the 25 H/P engines.
As the mill normally operates between 3400 and 3600 RPM this leaves the mill
with plenty of torque in reserve. The 25 H/P engine has proved itself to be
extremely reliable in the three years we have had them in service, many engines
have clocked over 4000 hours with little other than routine maintenance. These
engines like the new 27 H/P engine replacing them are protected by high
temperature cut out as well as low oil pressure cut out. The combination of
these two things means that very few problems turn into big ones. The new mills
will be covered by a two year warranty as has been the case from the beginning.
For people not requiring the production that this mill offers, may be better
served by either the
Model 6 - 13 or the Model 6 -18. These machines are both six inch models and are powered respectively by a 13 H/P Honda pull start engine and an 18 H/P electric start Vanguard engine.