The cylindrical bevel gear features a conical structural design, with teeth arranged in a helical pattern, enabling transmission between two shafts whose axes intersect—at a typical angle of 90°. Key features include:
- Materials: Commonly used are 20CrMnTi carburized steel (with carburizing and quenching treatment), 42CrMo alloy steel, stainless steel, or bronze (for special operating conditions), ensuring high wear resistance and impact strength.
- Manufacturing process: Forging billet → CNC machining → Heat treatment (carburizing/quenching) → Gear grinding and precision finishing (surface roughness Ra0.6), achieving accuracy as high as Grade 6 (GB/T 10095).
- Structure: Includes a hub, gear ring, and shaft hole, some with keyways or bolt holes for easy installation.
- Performance: High rotational speed with low noise (noise reduced by 10–15 dB), strong load-carrying capacity, and transmission efficiency exceeding 98%, making it ideal for heavy-duty, high-speed applications.
Category
1. Product Category: Mechanical Transmission Components > Gears > Bevel Gears > Spiral Bevel Gears.
2. Subcategory:
- By module: Small module (≤5 mm), large module (>10 mm);
- By precision: high-precision gears (precision grade 6 or higher), standard-precision gears;
Scope of Application
Heavy industrial machinery: mining crushers (such as cone crushers and gyratory crushers), cement plant ball mills, and transmission systems for mining excavators.
Construction machinery: ship propellers, oil drilling rigs, well-drilling rigs, industrial cranes.
Vehicle components: automotive differential, locomotive transmission system, tractor rear axle gears.
General-purpose equipment: gear reducers, gearboxes, and industrial robot joint drives.
How it works
When two intersecting shafts need to transmit power, spiral bevel gears achieve motion transmission through the progressive engagement of their helical teeth:
- Meshing process: The helical teeth of the pinion (driving gear) gradually come into contact with the tooth surfaces of the gear wheel (driven gear) along the helix, creating a dynamic process that transitions from point contact to line contact and back to point contact—minimizing impact.
- Motion transmission: When the driving wheel rotates, it drives the driven wheel via sliding friction between the helical teeth, thereby changing the direction of motion (e.g., enabling vertical steering).
- Advantage: The helical gear design ensures smoother transmission, making it ideal for high-speed and heavy-load applications; however, it requires compatible specialized lubrication (such as oil-based cutting fluids) to minimize wear.
Arc Gear Bevel Model Parameter Table
Parameters |
Model Example 1 |
Model Example 2 |
Explanation |
Modulus (m) |
8mm |
12mm |
Depending on the torque selection, a large module is suitable for heavy loads. |
Pressure Angle (α) |
20° |
25° |
Common values that affect tooth profile strength |
Number of teeth (z) |
Small gear: 20 teeth |
Large gear: 60 teeth |
Speed ratio = Number of teeth on the large gear / Number of teeth on the small gear |
Diameter (D) |
Pinion gear: φ200mm |
Large gear: φ600mm |
Calculate based on module and number of teeth |
Materials |
20CrMnTi Carburizing Steel |
42CrMo Alloy Steel |
Carburized layer depth: 0.8–1.5 mm |
Heat Treatment |
Carburizing and Quenching |
Tempering Treatment |
Hardness HRC58-62 (tooth surface) |
Accuracy Level |
Level 6 (GB/T 10095) |
Level 7 |
Surface roughness Ra 0.6–1.6 μm |
Applicable Operating Conditions |
Crusher Transmission |
Cement mill gear |
Temperature: -20°C to 200°C, Speed ≤ 3000 rpm |
By application: crusher gears, cement mill gears, vehicle differential gears, industrial equipment gears.
Keywords
Previous: Spline gear shaft
Next： Spur gear
Circular Arc Bevel Gear
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