ISO 9001:2008 Enterprise

Special Focus

Bevel Helical Geared Motor

In the News
News Index

Agnee Registered as Vendor with Defense
Details

Agro Engineers
(ISO 9001:2008 Enterprise)
F-557, Indraprastha Industrial Area,
Kota - 324005, Rajasthan, INDIA.
Telephone:+91-744-2490773

Contact Us

D&B D-U-N-S® Number

Home | About Us | Contact Us | Complaint | Warranty

Bevel Gears

Bevel Gear

They connect intersecting axes and come in several types. The pitch surface of bevel gears is a cone. They are useful when the direction of a shaft's rotation needs to be changed. Using gears of differing numbers of teeth can change the speed of rotation. They are usually mounted on shafts that are 90 degrees apart, but can be designed to work at other angles as well.
These gears permit minor adjustment during assembly and allow for some displacement due to deflection under operating loads without concentrating the load on the end of the tooth. For reliable performance, Gears must be pinned to shaft with a dowel or taper pin. Bevel gear sets consist of two gears of different pitch diameter that yield ratios greater than 1:1.

Application
The bevel gears find its application in locomotives, marine applications, automobiles, printing presses, cooling towers, power plants, steel plants, defence and also in railway track inspection machine. They are important components on all current rotorcraft drive system.
A good example of bevel gears is seen as the main mechanism for a hand drill. As the handle of the drill is turned in a vertical direction, the bevel gears change the rotation of the chuck to a horizontal rotation. The bevel gears in a hand drill have the added advantage of increasing the speed of rotation of the chuck and this makes it possible to drill a range of materials.

Straight Bevel Gear

Straight Bevel Gear

Straight bevel gears are the simplest of the bevel gears. They are manufactured on precision generating machines by indexing method ensuring that the teeth should be of tapered depth and thickness. Teeth are cut on the outside of the cone. They have a straight tooth geometry, which if extends, passes through the intersection of their axes.
Straight bevel angle can also be with one gear flat with a pitch angle of 90 degrees. These have conical pith surfaces that operate on intersecting axes. They can be designed and cut to operate on any shaft angle. In straight bevel gears when each tooth engages it impacts the corresponding tooth and simply curving the gear teeth can solve the problem.
Straight bevel gears come in two variations depending on the fabrication equipment. They are grouped into Gleason type and the standard type. Major percentage of them is of Gleason type with a coniflex form that gives almost an imperceptible convex appearance to the tooth surface. In the standard form, the gear has no profile shifted tooth.

Application
These gears are recommended at less speed and when loads are light. At higher speed they make noise. The most preeminent function of these gears is in a bevel gear differential. Straight tooth gears are also used in chemical industries, steel plant, machine tools, cement plant, textile processing, material handling system, sugar mills and cooling towers etc.

Zero Bevel Gears

These gears are similar to straight bevel gears but the teeth are curved in lengthwise direction. These curved teeth are arranged in such a manner that effective spiral angle is zero.

Spiral Bevel Gear

Spiral Bevel Gear

Spiral bevel gears have spiral angles, which gives performance improvements. They are designed for an angle change of 90 degrees, where the two axes are concurrent and in the same plane. These gears have a double function of being helical and beveled at the same time. The contact between the teeth starts at one end of the gear and then spreads across the whole tooth. In this type of gears the shaft must be perpendicular to each other and must be in the same plane.
They are the most complex forms of bevel gears. The teeth are curved by cutting them obliquely, resulting in higher overall contact ratios. Because of higher contact ratio, these have better load carrying capacity an this allows them to be smaller in size for a given load capacity than an equivalent gear. Thus they can transmit more power with smaller gears.

Application
Spiral bevel gears are important components on all current rotorcraft drive systems. These components are required to operate at high speeds, high loads, and for an extremely large number of load cycles. In this application, spiral bevel gears are used to redirect the shaft from the horizontal gas turbine engine to the vertical rotor. They are also used in power windows and power seats. They are used where speed and strength are desirable along with the change in angle of power flow.

<<back

Industrial Resources | Technical Articles | Articles Helical Gears Capacity Ratings Agnee Bevel Helical Gearboxes | Application Areas of Gearboxes

Industries we serves include Sugar, Cement, Paper, Solvent Extraction, Rubber, Steel Industry, Power Plants, Mines and Minerals, Chemical, Elevator, Textile, Plastic & leather, Waste water treatment, Food & tobacco.