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The Natural Philosopher[_2_] The Natural Philosopher[_2_] is offline
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Default Qualcast electric hedge trimmer clutch

On 12/07/18 10:28, Harry Bloomfield wrote:
I asked some while ago if these things might include a clutch to prevent
overload, because the drive was frequently slipping and received no
answer. It is the 600w model, with a blade able to be rotated from H to
V cut.

I have been inside and no, there is no clutch at all. The slippage was
due to a worn drive system.. The end of the motor shaft has a pinion,
which drives crown wheel, which was partially supported on one side by a
casting. The quite soft metal crown wheel had worn in one spot, which
was where it was causing slipping. The crown wheel was on a spindle,
with a small roller bearing top and bottom, bottom in rigid casting, top
bearing supported by the plastic housing. Absolutely no adjustment
anywhere at all and a very poor design.

I fitted a small washer under the bottom bearing, to push the crown
wheel a tad further out of the casting, making the crown wheel a tighter
fit against the motor pinion. It will not likely last long.

I have had it around three years, during which time have have probably
cut our bit of hedge around nine times in total, so rather disappointed
that it survived such a short time.


Ihave found that sort of behaviors in many later electric triummers.
They are built to a price and a quality that just takes them through
warranty.

A cast mezak crown wheel is pence. To machine a decent one out of hard
steel is pounds.

Go figure.

I inherited a B & D electric drill from my father - he got it around
1960. It lasted until 1995

I have had three sinec then, all scrapped.



--
If you tell a lie big enough and keep repeating it, people will
eventually come to believe it. The lie can be maintained only for such
time as the State can shield the people from the political, economic
and/or military consequences of the lie. It thus becomes vitally
important for the State to use all of its powers to repress dissent, for
the truth is the mortal enemy of the lie, and thus by extension, the
truth is the greatest enemy of the State.

Joseph Goebbels