spiral bevel gear

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High transmission efficiency

Among various mechanical transmissions, the transmission efficiency of spiral bevel gears is the highest, which has great economic benefits for various types of transmissions.

Stable gear ratio

Spiral bevel gear transmission ratio is permanently stable, and the transmission ratio is stable.

High carrying capacity

Spiral bevel gears are widely used in aviation, automobile and other industries because of their high bearing capacity, low noise and smooth transmission.

About Spiral Bevel Gear

A Spiral Bevel Gear are used to transmit power between shafts that are at a 90-degree orientation to each other. Also, these custom parts are engineered with precision teeth which have a unique curve and are oblique in shape. The teeth have one concave, one convex side, feature a curve and have a spiral angle. This spiral angle is located from the tooth trace and pitch cone, resembling a helix angle that is located in teeth of helical types.

Since spiral bevels are not offset, less sliding occurs within gear teeth. This results in a low temperature operation with more efficient functionality than hypoid gearing types. Also, since there is a large amount of tooth surface this allows for greater interlocking during the rotation process. Because of this overall efficient operation, our custom spiral bevel gears are perfect for high speed, high torque transmission and power generation application types.

Benefits Of Spiral Bevel Gears?

Spiral bevel gears are primarily used as vehicle differentials, helping to assist the driveshaft and making vehicle wheels turn 90 degrees. Compared to straight-cut or spur-cut versions, spiral bevels cause less noise and less vibration due to their curved shape. Therefore these gears are an essential part of smooth and safe driving.

Differences between straight bevel gear and spiral bevel gear?

Straight Bevel Gear Spiral Bevel Gear
Teeth of this type of gear are straight and are cut along the axis on a cone. Here the teeth are spiral and are cut in the form of spiral curve on the pitch cone.
Two teeth of the mating gears come in sudden contact. The contact is always a line of length equals to face width of teeth. Teeth of two mating gears gradually come in contact. Engagement starts with a point and gradually becomes a line.
Due to sudden contact, teeth are also subjected to impact or shock loading. Here teeth are subjected to gradual loading.
Sudden contact also causes noise. Its operation is quite.
Shock loading induces vibration and thus its operation is not smooth. Due to gradual building up of load, it produces less vibration and thus the operation is smooth.
Designing and manufacturing of straight teeth bevel gear are easier and thus these are cheaper. Complicated design and manufacturing leads to higher cost for this type of gear.
It exerts less thrust force on the bearings that hold the shafts. It exerts more thrust force on bearings.


Application of spiral bevel gear

Spiral bevel gear has been widely used because of its advantages. It is mainly used in mechanical engineering fields such as petroleum, mining, machine tools, coal mining machinery, motor vehicles, trains, ships, aviation helicopters and so on.
Bevel gears are used in vehicles of all types as well as industrial applications such as wind turbines and cooling towers, steel manufacturing, and printing presses. If your application requires high rpm, high torque, and/or many load cycles, spiral bevel gears will be the best choice. Spiral design is also recommended for reducing speed. If your application requires transferring power to two shafts which are spinning at different speeds – a vehicle differential, for instance – the best choice is a hypoid bevel gear.

Main Products

The teeth of spiral gears are curved and oblique, in contrast to the teeth orientation of straight bevel gears. This results in more overlap between teeth which promotes gradual engagement and disengagement upon tooth contact. This improved smoothness results in minimal vibration and noise produced during operation.

Spiral bevel gear video

According to the customer’s drawings, we can produce large forging, casting, welding, and spiral bevel gears. According to the working conditions and clients’ requests, we also can do gear grinding, surface hardening, cemented and quenching, Nitriding, quenching, etc.

We provide customized services

Accept custom made spiral gears as per drawings and samples.

high transmission efficiency, smooth operation, low noise, not easy to corrosion and rust

various specifications, support non-standard customization

“With over 20 years of rich experience, it specializes in gears, shafts and other parts, with advanced equipment, production capacity management, quality control, research and development, exhibition experience, and export market.”

—— XL Group

“We have exported our products to clients worldwide and earned a good reputation because of our superior product quality and after-sales service. Any requirement for Non-standard gears, we welcome your drawing or samples. We can develop for you what gears you want.”

—— XL Group

Spiral Bevel Gear Plunge Grinding

Plunge grinding is a discontinuous grinding process in wich machining is also performed tooth by tooth. Both tooth flanks are machined simultaneously. There is a surface contact between tooth flank and grinding wheel. Due to the plunge movement of the grinding wheel in axis direction, the grit path runs in parallel to the tooth base and the surface structure runs in tooth width direction.
Grinding grooves running in parallel to the tooth base emerge. The grinding direction is from ring gear toe at the inner diameter to ring gear heel at the outer diameter, or vice versa. Only ring gears can be produced by means of plunge grinding. Pinions cannot be ground with this process due to their geometry.

Additional oscillating movement besides main rotation of the grinding wheel

Grinding spindle is positioned in eccentric bushing, separately driven

Eccentric value between 0.1 mm and 0.3 mm

Eccentric speed approx. 200 – 500/min slower than rotational speed of the grinding wheel

Improved surface in pinion grinding

Frequently Asked Questions

Learn more about spiral bevel gear

What is a spiral bevel gear?
A spiral bevel gear is a bevel gear with helical teeth. The main application of this is in a vehicle differential, where the direction of drive from the drive shaft must be turned 90 degrees to drive the wheels. The helical design produces less vibration and noise than conventional straight-cut or spur-cut gear with straight teeth.
How to install spiral bevel gears?
Spiral bevel gear has high transmission efficiency, stable transmission ratio, large arc overlap coefficient, high bearing capacity, stable and smooth transmission, reliable operation, compact structure, energy saving, material saving, space saving, wear resistance, long life and low noise. When installing the spiral bevel gear, it is necessary to use a thrust bearing to eliminate the axial thrust generated by the bevel gear, and align the back and back of the two meshing gears. Only when the back and back of the bevel gear are aligned, the two gears can search for correct meshing. After adjusting the bevel gear Align the rear and back of the bevel gear, and lock the gear backlash after fixing the two bevel gears.
What are the characteristics of bevel gear transmission?
Several main characteristics of spiral bevel gear transmission are as follows: 1. The comprehensive radius of curvature is much larger than that of involute gear transmission, and its contact strength is about 0.5 to 1.5 times higher than that of involute gear transmission. 2. The rolling speed of the two gear teeth along the meshing line is very large, and the oil film is easy to form between the tooth surfaces, and the transmission efficiency is high, generally reaching 0.99 to 0.995. 4. The bevel gear has no undercut phenomenon, so the number of small teeth can be less.
What is the principle of spiral bevel gear?
Spiral bevel gear transmission is used to transmit motion and power between two intersecting shafts. Its gear teeth are cut along the prime line of the conical surface. The bevel gears are evenly distributed on a cone. One end of the shape is large, and the other end is small. Take the big end parameter as the standard value. When working, it is equivalent to rolling the friction wheel made of the cones of the two gears. The cone tops of the two cones must overlap to ensure the same transmission ratio of the two cones. In this way, the accuracy and bearing capacity of the bevel gear drive are increased, and it is mainly used in automobile rear axle gearboxes, hydraulic transmission diesel locomotives, fan shafts, axle gearboxes, planer workbenches and feed mechanisms.
Transmission efficiency of spiral bevel gears?
Spiral bevel gears are well known for their high transmission efficiency, stable transmission ratio, large arc overlap coefficient, high bearing capacity, smooth transmission, reliable work, compact structure, energy saving, material saving, space saving, wear resistance, long life and low noise. Among various mechanical transmissions, the transmission efficiency of the spiral bevel gear is the highest, which has great economic benefits for various types of transmissions, especially high-power transmissions; the transmission pair of transmission parts required to transmit the same torque is the most space-saving, and is more space-saving than belt, The space required for the chain drive is small;
Technical performance requirements of spiral bevel gears?
The spiral bevel gear is the central transmission part of the loader. The active spiral bevel gear transmits the power from the automobile transmission to the driven bevel gear, then sends the power to the differential. Therefore, in the structure of the parts, the driving spiral bevel gear is a gear shaft, one end is a spline, which is connected to the power output shaft of the transmission, and the other end is a spiral bevel gear; the driven bevel gear is a disc gear, the diameter of which is larger than that of the driving spiral bevel gear. At the same time, some bolt holes are evenly distributed along the circumference so that the driven bevel gear is fixed on the differential case by bolts, and the decelerated power is transmitted to the differential. The driving bevel gear has both high transmission speed and high torque transmission, and it is also subjected to shock loads during loading and braking. The main failure modes of such gears are worn, pitting, and fracture. Therefore, the active spiral bevel gear should meet the following performance requirements: ① good mechanical properties; ② good carburizing and quenching performance; ③ good impact resistance; ④ good core hardness; ⑤ good thermal deformation performance.

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