Focusing on the design, manufacturing processes, heat treatment techniques, and key quality control points for all types of standard and non-standard gears.
| Parameter | Specification |
| Module Range | M1–M20 |
| Accuracy Class | GB/T 11365 Class 7–8 / Up to Class 4–6 |
| Shaft Angle | 90° Standard, Custom Available |
| Pressure Angle | 20° Standard, Other Angles Available |
A Straight Bevel Gear is a bevel gear used to transmit power and motion between intersecting shafts, typically at a 90° shaft angle. Its teeth run straight along the generators of the pitch cone, allowing changes in transmission direction, speed, and torque.
Compared with spiral bevel gears, straight bevel gears have a simpler structure, lower manufacturing cost, and higher production efficiency. They are mainly suited to medium-low-speed and medium-load applications and are widely used in agricultural machinery, construction machinery, machine tools, industrial equipment, and selected automotive transmission systems.
The teeth extend from the large end to the small end along the generator of the pitch cone, forming the characteristic conical structure. Bevel gear pairs are designed according to the transmission ratio, shaft angle, and pitch cone angles.
Standard tooth geometry provides good interchangeability and convenient replacement. High-precision gears can be produced through precision shaping, broaching, or CNC gear grinding to improve tooth accuracy and meshing stability. Compared with spiral bevel gears, straight bevel gears are easier to manufacture and generally generate lower axial forces, reducing bearing and support requirements.
Straight bevel gears transmit power between intersecting shafts, typically at 90°, while converting speed and torque according to the gear ratio. Their teeth engage and disengage across the tooth width rather than through the continuous progressive engagement of spiral bevel gears, so meshing may be less smooth and produce more impact and noise.
They are therefore better suited to medium-low-speed applications without high-speed continuous or severe impact loads.
With proper design, installation, and lubrication, straight bevel gear drives can provide high transmission efficiency and stable, reliable operation. Common manufacturing processes include gear shaping, broaching, and CNC milling, while CNC gear grinding can further improve tooth geometry and surface finish for higher-precision applications.
Heat treatment processes such as quenching and tempering, induction hardening, and carburizing and hardening can improve tooth surface hardness, wear resistance, and load-carrying capacity.
Straight bevel gears offer simple construction, cost-effective manufacturing, easy installation and maintenance, and relatively low axial forces. They are suitable for medium-low-speed, medium-load transmission systems where economy and reliability are important.
Compared with spiral bevel gears, they generally generate greater meshing impact and operating noise, making them less suitable for high-speed, high-precision, or heavy-duty continuous operation. They remain widely used in agricultural machinery, construction machinery, machine tools, and industrial equipment.
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Parameter |
Standard Mass-Production Model (General Service) | High-Precision Custom Model (Precision Transmission) |
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Core Dimensional Specifications |
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Module Range |
M1–M20 | M0.5–M12 |
|
Number of Teeth Range |
Designed according to transmission ratio and structural requirements | Precisely matched to the required transmission ratio; non-standard tooth counts available |
|
Shaft Angle |
90° standard design | Non-90° shaft angles available on request |
|
Face Width Range |
Determined according to module, load and installation space | Optimized according to load capacity and meshing accuracy |
|
Secondary Machining |
Keyways, stepped bores and tapped holes available according to requirements | Precision secondary machining available according to requirements |
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Tooth Profile & Accuracy Specifications |
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| Tooth Profile Standard | Standard straight involute bevel gear tooth form |
High-precision involute tooth form; profile modification available |
| Standard Pressure Angle | 20° standard |
20° standard; non-standard pressure angles available on request |
| Accuracy Class | GB/T 11365 Class 7–8 |
Up to GB/T 11365 Class 4–6, depending on design requirements |
| Profile Modification | Standard tooth profile |
Tip relief and tooth profile modification available |
| Tooth Surface Roughness | Ra 1.6–3.2 μm |
Ra 0.4–1.6 μm |
| Remarks |
The above are standard machining parameter ranges for our straight bevel gears. Special sizes and non-standard structures can be custom-made according to your drawings.For a quotation, please provide module, number of teeth, shaft angle, material, accuracy class and quantity; we will reply with an exact quote within 12 hours. |
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High-quality blanks are forged and normalized to eliminate internal stress and stabilize material structure.
Turning, milling and hobbing/shaping are applied to form the target tooth profile with strict accuracy control.
Carburizing quenching or tempering processes to improve tooth surface hardness and core toughness.
Grinding of tooth flanks, bores and datum faces to correct deformation and enhance meshing precision.
Full-dimensional verification by gear measuring center and CMM to qualify products before release.
Professional anti-rust and protective packaging to keep products intact during storage and transit.
High-precision gear grinding delivers tooth surface roughness as low as Ra 0.4, with tight meshing, low vibration and noise for smoother equipment operation.
Premium materials matched with precise heat treatment ensure wear-resistant tooth surfaces and impact-resistant core, cutting maintenance and replacement costs.
Custom solutions for high-speed heavy load, corrosion resistance and food-grade scenarios, eliminating trial-and-error costs in product selection.
Scaled production supports tiered pricing for bulk orders with consistent quality; full-process control guarantees stable lead time and complete after-sales support.
Representative Grades: C45 / 45 Steel
45 steel offers a balanced combination of strength, toughness, machinability, and cost-effectiveness. After quenching and tempering or induction hardening, its tooth surface hardness and wear resistance can be improved. It is suitable for medium-low-speed, medium-load applications such as agricultural machinery, standard gearboxes, and general machinery.
Representative Grades: 20CrMnTi, 20CrMo, 40Cr, 42CrMo
Alloy structural steels provide high strength, toughness, and fatigue resistance. 20CrMnTi and 20CrMo are suitable for carburizing and hardening, while 40Cr and 42CrMo are commonly used after quenching and tempering. They are widely used in medium- and heavy-duty applications, including construction machinery, industrial gearboxes, and automotive transmission systems.
Representative Grades: 304, 316, 420
Stainless steel offers good corrosion resistance and environmental durability. 304 and 316 are suitable for humid and corrosive environments, while 420 stainless steel can achieve higher hardness and wear resistance through heat treatment. It is commonly used in food processing, pharmaceutical, chemical equipment, and light-duty transmission applications.
Representative Grades: ZG45, QT450
Cast steel and ductile iron offer good castability and are suitable for manufacturing large gears for low-speed applications. Cast steel provides higher load-carrying capacity, while ductile iron combines strength, wear resistance, and vibration damping. They are suitable for large, low-speed transmission systems in mining, metallurgy, and heavy machinery.
Representative Grades: H62, ZCuSn10Pb1
Copper alloys offer good wear resistance, corrosion resistance, and friction-reducing properties, with relatively low operating noise. They are suitable for light-load, medium-low-speed transmission applications where low noise is important, such as instruments, adjustment mechanisms, and specialized transmission systems.
Representative Grades: PA66, POM, PEEK
Engineering plastics offer advantages such as low weight, corrosion resistance, electrical insulation, and low operating noise. Some grades also provide good wear resistance and dimensional stability. They are suitable for light-load, medium-low-speed transmission applications in food processing, medical, packaging, and automation equipment.
Straight bevel gears are commonly used in harvesters, seeders, rotary tillers, and crop protection equipment to transmit torque and change the direction of power between intersecting shafts. Their reliable construction and easy maintenance make them well suited to outdoor agricultural machinery operating at medium-low speeds for extended periods.
In loaders, construction machinery, gearboxes, and industrial transmission equipment, straight bevel gears are used to transmit power and change the direction of rotation between intersecting shafts. Their mature manufacturing processes and cost-effective design make them suitable for medium-load applications requiring stable and reliable operation.
Straight bevel gears are used in conventional machine tools, drilling machines, milling machines, and other general-purpose machinery for reversing mechanisms, feed systems, and auxiliary drives. Their simple transmission structure and stable operation provide the basic precision and reliability required for general mechanical applications.
In packaging machinery, conveyor systems, and automated production lines, straight bevel gears are commonly used for power redirection and auxiliary transmission. Their easy installation and maintenance, combined with cost-effective manufacturing, make them suitable for medium-low-speed, continuous-duty applications and high-volume equipment.
Straight bevel gears are used in mining equipment, metallurgical machinery, and heavy industrial systems to transmit power and change the direction of rotation between intersecting shafts. With appropriate material selection, heat treatment, and gear design, they can meet the requirements of medium-low-speed applications with relatively high torque.
In building materials machinery, processing equipment, and specialized mechanical systems, straight bevel gears can be used for internal power redirection and auxiliary drives. Their flexible specifications and mature manufacturing processes make them suitable for equipment requiring a compact transmission layout, cost efficiency, and reliable operation.
Inner VCI vacuum anti-rust process fully seals tooth flanks and critical machined surfaces, effectively resisting salt spray and moisture during ocean and air freight to keep precision gears corrosion-free throughout long-distance transit.
We select cost-effective logistics channels with stable transit time and controlled costs. Full logistics tracking is available with real-time status updates to ensure reliable and punctual delivery.
All products are covered by a 1-year warranty. Quality defects caused by non-human factors are fully guaranteed, removing your procurement concerns.
Our professional technical and after-sales team is always available to respond quickly to inquiries and after-sales needs, and efficiently resolve issues during installation and operation.
We support full-parameter OEM/ODM customization based on 2D/3D drawings or physical samples, including module, tooth profile, material and heat treatment specifications. You only need to provide core gear parameters, detailed drawings or physical samples to start the customization process.
You can send physical samples to us via international courier. Upon receipt, we will complete full-dimensional measurement and parameter verification, then arrange sample production after confirming the solution, ensuring the finished product fully matches the original in installation dimensions and transmission performance.
Prototype orders usually ship within 15–25 days, subject to heat treatment and grinding scheduling. Lead time for bulk orders will be confirmed after process finalization, with stable and well-managed production schedules.
We adopt a tiered pricing policy — the larger the order quantity, the more favorable the unit price. All orders follow the same production and quality inspection standards with strict accuracy control. Quality will never be compromised for larger order volumes.
We can include dimensional inspection reports, hardness test records and material certificates with each shipment. For high-precision key projects, professional inspection data from CMM and gear measuring centers is also available.
All products come with a 1-year warranty covering material defects and manufacturing quality issues under normal use. We also have a professional technical team to provide full-process consultation and selection support.
Spur gears feature a simple structure and no axial load, ideal for medium-low speed general transmission with higher cost-effectiveness. Helical gears run smoother with lower noise and higher load capacity, suitable for high-speed heavy-duty applications. We can recommend the optimal solution based on your actual requirements.
+86 184 3796 0706 
info@destinytrans.com 
