Helical
Gears Helical
gears are ideally suited for very high speed and take up appreciable load,
though their efficiency is lesser than that of spur mesh. Helical gears
primarily connect to parallel shafts, with their teeth lying along helices. It
is this
parallel shafting that ensures high speed and its application wherever spurs
gears are used .Helical Gears are highly recommended for all high speed and
high load meshes. Helical gear is almost equal in quality to spurs excepting for
the complication of their angle. Why
should we use helical gear reducer? As
we have seen above helical gears are more efficient and capable of handling higher
speeds and loads and also in-Line reducers are less expensive than the more traditional
parallel shaft. But this fact is evened out by because the parallel shaft with
its varied options has been proven to be more flexible. Now let us take a
look at the type of helical gears.
Crossed-Helical
The
typical characteristic of this type is Skewed shafting, point contact, high sliding.
These are ideally suited for lower speeds and lighter loads. This type is to better
avoided
for precision meshes. Another feature being the point contact is of limited capacity
and precision and therefore is suitable for right angle drives if the load is
light. Good lubrication should always be ensured in use of helical gears.
How
is the ratio determined for a helical gear set? A bevel gear set? A worm
gear set? Simply
put, the ratio of a helical gear is determined
by the simple formula of dividing the number of teeth in the larger gear by the
number of teeth in the smaller gear.
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