SPIRAL BEVEL GEAR  

Spiral bevel gears have their teeth formed along spiral lines. They are somewhat analogous to cylindrical type helical gears in that the teeth are angled; however with spiral gears the teeth are also curved.

The advantage of the spiral tooth over the straight tooth is that they engage more gradually. The contact between the teeth starts at one end of the gear and then spreads across the whole tooth. This results in a less abrupt transfer of force when a new pair of teeth come in to play.

Difference Between Straight Bevel Gear and Spiral Bevel Gear

Teeth of the bevel gear can have either straight or spiral profile; however, both are applicable for intersecting shafts only. 

Straight bevel gear

In straight teeth bevel gear, teeth are straight like spur gear but are cut along the gear axis maintaining an inclination. Due to sudden contact between teeth of two mating gears, tooth experiences impact load. This results in vibration and noise. Face bevel gear and skew bevel gear also have straight teeth.

Spiral bevel gears

Spiral teeth helical gears offer similar benefits over straight teeth bevel gears as the helical gears provide over spur gears. Here teeth have a spiral profile and thus gradually come in contact during mating. Thus it offers smooth, vibration-free and quiet operation. However, it exerts high thrust load on the bearings. Hypoid gear also have spiral teeth. Various differences between straight bevel gear and spiral bevel gear are given below in table format.

spiral gear

Spiral bevel gears have become increasingly popular due to their high shifting capability under stress. For high speeds or if a little slackness is required, the hard peeling or sanding is carried out after the hardening process.

Spiral Bevel Gear Features

Spiral bevel gears are bevel gears with helical teeth positioned in a 90-degree angle. The teeth are designed with a slight curve to provide better flexibility and traction. Although they can be considered a hypoid gear, they have no offsets, which indicates they will not slip during operation. This ensures smooth, reliable transmission ideal for high-speed, high-torque applications.

Feature1

Here the teeth are spiral and are cut in the form of spiral curve on the pitch cone.Teeth of two mating gears gradually come in contact. Engagement starts with a point and gradually becomes a line.

 

Feature2

Complicated design and manufacturing leads to higher cost for this type of gear.It exerts more thrust force on bearings.Here teeth are subjected to gradual loading.Its operation is quite.Due to gradual building up of load, it produces less vibration and thus the operation is smooth.

Feature3

Complicated design and manufacturing leads to higher cost for this type of gear.It exerts more thrust force on bearings.

What are the Benefits of Choosing Spiral Bevel Gears?

 Spiral bevel gears are bevel gears with helical teeth positioned in a 90-degree angle. The teeth are designed with a slight curve to provide better flexibility and traction. Although they can be considered a hypoid gear , they have no offsets, which indicates they will not slip during operation. This ensures smooth, reliable transmission ideal for high-speed, high-torque applications.

High-Volume Applications

Spiral bevel gears provide smooth,reliable,quiet operation.The gears are made of hardened alloy steel and are contained in an aluminum alloy housing for maximum strength and heat dissipation. 

The modified helical teeth of spiral bevel gears create dependable, tooth-to-tooth traction that minimizes backlash and prevents the gears from slipping. The gears are carefully spaced to allow lubricants to be spread evenly. The spiral bevel gears in a gearbox are precisely adjusted via a unique, adjustable locknut design.

Spiral bevel gears are designed for applications that require high speed and high torque power. They can help cut consumer costs by providing long-lasting performance with minimal need for repairs or replacements. With spiral bevel gears, there is no need for offsets and a significantly reduced risk of overheating. Curved teeth and deeper traction between those teeth ensures greater asset availability to improve flexible performance and extend equipment life.