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90 degree gearboxes
A Gearboxes Manual - 90 Degree Gearboxes
by RinoMechanical
A gearbox is the system of gears and/or the hydraulic system
that transmit mechanical power from a prime mover - such as an
engine or electric motor - to a typically rotary output device
at a lower angular momentum but a higher motive torque.
Gearboxes
have found use in a wide variety of different -- often
stationary -- applications. Transmissions are also used in
agricultural, industrial, construction, mining and vehicle
equipment. In addition to ordinary transmission equipped with
gears, such equipment makes extensive use of the hydrostatic
drive and electrical adjustable - speed drives.
A Gearbox is also called gear head, gear reducers or speed
reducers. They are available in broad range of sizes, capacities
and speed ratios. Gearing arrangement for gearbox includes spur,
helical, planetary, bevel, worm, and cycloidal.
90 degree gear box
A
90 degree
gearbox, also known as a right angle gearbox, transmits
torque at 90 degrees to the input shaft. It features a variety
of mounting holes which enable it to be mounted easily in almost
any position.
Right angle gearboxes contain input shafts that are positioned
perpendicular to the output shafts. Right angle gear boxes have
up to 98% efficiency levels and are common in printing presses
and glass cutting equipment.
Bevel Gearbox
A Bevel gear is a gear wheel with tapered teeth meshed with
another so that their shafts are at an angle of 90 degrees. They
connect intersecting axes. A bevel gear box is yet another right
angle gearbox solution with a much higher efficiency. It has a
low ratio. The ratio of a bevel gearbox is reached at by
dividing the number of the teeth of the larger wheel by the
number of teeth of the smaller wheel. It is also known a
right
angle bevel gearbox. In bevel gearboxes, 2 axles cross at a
point and engage by means of a pair of conical gears. These
gears enable a change in the axes of rotation of the respective
shafts, commonly at 90 degrees. There are four types of bevel
gear boxes:
- Straight bevel gearboxes - They have
a conical pitch surface and straight teeth tapering towards an
apex.
- Zero bevel gear boxes - This is similar to a bevel
gear except the teeth are curved. In essence, zero bevel gear
boxes are spiral bevel gear boxes with a spiral angle of zero.
- Spiral bevel gear boxes - The teeth are curved teeth
at an angle allowing contact and motion to be gradual and
smooth.
- Hypoid bevel gearboxes - These are similar to spiral
bevel except that the pitch surfaces are hyperboloids rather
than cones. Pinion can be offset above or below gear center,
thus allowing larger pinion diameter, and longer life and
smoother mesh.
Wear and tear is common in
gear
boxes. This mostly occurs as a result of contamination and
degradation of the lubricant. Therefore the oil used should be
free from contamination. Breathers are often used to allow
airflow on the gear box.
As there are moving parts in gearboxes, they have to be well
preserved. It is important to take care of
gearboxes
. An annual check of all switches and sensors as well as cooler
condition should be performed to ensure its long life and
trouble free performance.
About the author
Rino Mechanical
Components Inc. is a manufacturing resource which
specializes in production of all types of mechanical components,
including
air motors.
Mechanical parts are
custom made as per the client's specifications. A guarantee of
two years is provided with all products. All equipment is of top
quality made exactly to the consumer's liking.
© Copyright 2005-07, Rino Mechanical Components Inc. All rights
reserved.
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