Custom Spiral Bevel & Miter Gears

Available Specifications

Item	Specifications
Number of Modules (max.)	4
Diametral Pitch (min.)	6.5
Outer Diameter (max.)	φ100
Machining Material	Carbon Steel	S45C(AISI 1045)
	Alloy Steel	SCM415(AISI 4115), SCM420(AISI 4118), SCM435(AISI 4135), SCM440(AISI 4140), SNCM420(AISI 4320)
	Stainless Steel	SUS304(AISI 304)
Machining Equipment	5-axis multi-tasking machine DMG Mori, NTX1000
	Spiral Bevel Gear SBG-10×11
	CNC Cylindrical Grinder, E300G
	NC grinding machine for spiral bevel gears (module: ~4, DP: 6.5~)

What makes Spiral Bevel Gears Unique?

In the case of spur gears, for instance, when cutting gears with a module of 1, you can utilize a hob (cutting tool) with a module of 1, regardless of the tooth ratio. However, when it comes to spiral bevel gears, the theoretical cutter diameter is determined by considering various factors, including the tooth ratio, tooth width, torsion angle, and gear module. The theoretical cutter diameter can vary significantly based on these specifications mentioned earlier.
In essence, even if you have numerous cutters, they may not suffice because the same module can yield different theoretical cutter diameters depending on the tooth ratio. This implies that a standardized approach is needed.

Currently, when cutting small modules like ours (2.5 modules or smaller), cutter diameters are standardized to some extent, such as 0.5 inch, 1.1 inch, 1.5 inch, 2 inch, and 3.5 inches. A standard cutter is selected to approximate the theoretical cutter diameter calculated based on the various specifications. For example, if the theoretical cutter diameter is 1.2 inches, you can choose either a 1.1 inch or 1.5 inch standard cutter.
Considering that standard cutters are further adjusted based on factors such as cutter No. (blade tilt angle) and point width (cutting edge width) in accordance with gear specifications, it becomes evident that a substantial quantity of cutters is still required.
Therefore, despite the theoretical complexity of spiral bevel gears, they represent an appealing choice for manufacturers due to their high degree of adaptability.

Uses of Spiral Bevel Gears

FAQs about Spiral Bevel Gears

Q.1: What is the difference between Spiral/Straight Bevel Gears?

A.1: spiral bevel gears have curved teeth that are helical in shape, allowing for smoother and quieter operation due to gradual tooth engagement. This design also distributes the load over several teeth, providing better strength and durability. In contrast, straight bevel gears have straight teeth that engage all at once, leading to sudden load application and potentially noisier operation.

Q.2: What is the "Efficiency" of Spiral Bevel Gears?

A.2: The efficiency of spiral bevel gears typically ranges from 94% to 98%, depending on the design, lubrication, and load conditions. Their helical tooth design ensures smooth tooth engagement, reducing friction and energy losses, which contributes to their high efficiency.

Q.3: Are Spiral Bevel Gears bidirectional?

A.3: Yes, spiral bevel gears are bidirectional, meaning they can transmit power in both rotational directions. However, the performance characteristics, such as noise and vibration levels, might vary slightly depending on the direction of rotation and the specific design of the gear set.