Steel straight bevel gears with a straight tooth system and a 1.25:1 ratio are conical gears designed to transmit power between intersecting shafts, typically at a 90-degree angle. The 1.25:1 ratio indicates that for every 1.25 rotations of the driving gear, the driven gear completes one rotation, providing a slight speed reduction and torque increase. These gears feature straight teeth parallel to the cone's generators, resembling conical spur gears, which makes them simpler to manufacture but noisier at high speeds due to abrupt tooth engagement. Made from materials like carbon steel (e.g., C45), they offer durability for applications like machinery, automotive systems, and power transmission. Their engagement angle is typically 20°, with milled or planed teeth for precision.
Steel Straight Bevel Gear Ratio 1.25:1
|
 |
| Module | Number of teeth |
da | d | ND | NL | L1 | L | S | b | BH7 | E | Torque* | Gewicht |
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | Ncm | g | ||
| 3 | 16 | 52,9 | 48 | 40 | 11,7 | 27 | 29,2 | 16,9 | 17 | 15 | 45 | 5,2 | 220 |
| 3 | 20 | 63,9 | 60 | 40 | 10,0 | 25 | 27,8 | 18,4 | 17 | 15 | 40 | 6,5 | 300 |
| 4 | 16 | 70,6 | 64 | 50 | 12,5 | 32 | 36,5 | 20,6 | 22 | 20 | 58 | 12,7 | 470 |
| 4 | 20 | 85,2 | 80 | 50 | 15,0 | 33 | 38,4 | 26,3 | 22 | 20 | 55 | 15,9 | 700 |
| 5 | 16 | 88,2 | 80 | 60 | 12,0 | 40 | 44,2 | 23,3 | 29 | 20 | 70 | 25,4 | 910 |
| 5 | 20 | 106,6 | 100 | 60 | 15,0 | 39 | 45,0 | 29,1 | 29 | 25 | 65 | 31,8 | 1300 |
Steel Straight Bevel Gear Design Features
- Conical Geometry for Shaft Interconnection: These straight bevel gears have a conical shape, enabling power transmission between shafts typically intersecting at 90 degrees. The 1.25:1 ratio ensures the driving gear rotates 1.25 times for each rotation of the driven gear, optimizing speed and torque for specific applications.
- Straight Tooth Configuration: The teeth are cut straight along the conical surface, parallel to the gear's generators. This design simplifies manufacturing and ensures uniform load distribution but results in noisier operation at high speeds due to abrupt tooth contact compared to curved-tooth designs.
- Material Selection (Steel): Constructed from high-strength carbon or alloy steels like C45, these steel bevel gears provide excellent durability and wear resistance. The material choice supports heavy-duty applications in automotive, industrial machinery, and power transmission systems under significant mechanical stress.
- Pressure Angle Standardization: Typically designed with a 20-degree pressure angle, this feature ensures efficient force transmission and compatibility with standard gear systems. The angle balances tooth strength and smooth engagement, critical for maintaining performance in high-torque environments.
- Precision Manufacturing (Milling/Planing): The teeth are milled or planed for accuracy, ensuring precise meshing and minimal backlash. This precision enhances efficiency and reduces vibration, making the gears suitable for applications requiring consistent performance, such as in gearboxes or differential systems.
- 1.25:1 Gear Ratio Specificity: The 1.25:1 ratio provides a slight speed reduction, increasing torque output. This makes the steel straight bevel gears ideal for applications needing moderate speed adjustments, such as in conveyor systems or small-scale machinery, ensuring efficient power transfer.
Steel Straight Bevel Gear Purpose
- Automotive Differentials: Steel straight bevel gears are integral in vehicle differentials, enabling torque transfer between wheels at different speeds. Their robust design handles high loads, ensuring smooth cornering and reliable performance in cars, trucks, and off-road vehicles.
- Locomotive Drive Systems: In railway locomotives, these steel bevel gears transmit power from the engine to the wheels. Their durability under heavy loads and ability to maintain precise shaft angles make them ideal for ensuring consistent traction and operational reliability.
- Printing Presses: Straight bevel gears drive rollers and components in printing presses, ensuring synchronized movement. Their precise tooth engagement supports high-speed operations, delivering accurate paper feed and print alignment in large-scale printing applications.
- Marine Propulsion Systems: Used in marine gearboxes, these bevel gear sets transfer engine power to propellers at right angles. Their steel construction withstands harsh marine environments, providing reliable torque transmission for boats and ships under varying load conditions.
- Industrial Machinery: In machines like lathes or milling equipment, straight bevel gears facilitate power transmission between perpendicular shafts. Their strength and simple design ensure efficient operation in manufacturing processes requiring consistent torque and speed control.
- Power Tools: Steel straight bevel gears are used in power tools like drills and saws, enabling compact designs with efficient power transfer. Their ability to handle high torque ensures reliable performance in demanding construction and woodworking applications.
 |
 |
| Automotive Industry | Printers |
 |
 |
| Marine Industry | Industrial Machinery |
Bevel Gear Vs Miter Gear
Bevel Gears: Bevel gears have a conical shape and are designed to transfer motion and power between shafts that intersect, most commonly at 90 degrees, though other angles are possible. Their teeth can be straight, spiral, or hypoid. Straight bevel gears, with teeth cut straight along the cone, are simpler and cost-effective but noisier at high speeds due to abrupt tooth contact. Spiral bevel gears, with curved teeth, provide smoother, quieter operation, making them ideal for high-speed or heavy-load applications like automotive differentials or industrial machinery. Hypoid bevel gears, with an offset pinion, enable greater torque and flexibility in shaft positioning. Bevel gears support variable gear ratios, allowing speed or torque changes, and are used in diverse applications, from power tools to aerospace systems, where they handle varying loads and speeds efficiently.
Miter Gears: Miter gears are a specific type of bevel gear with a fixed 1:1 gear ratio, meaning both gears have equal tooth counts, resulting in no speed or torque change between shafts. Typically featuring straight teeth, miter gears prioritize simplicity and are used in applications requiring precise 90-degree motion transfer, such as robotics, woodworking, or printing machinery. Their design limits them to equal-speed tasks and lighter loads compared to other bevel gears.
Key Differences: Bevel gears offer flexibility with variable ratios and tooth designs (straight, spiral, hypoid), suiting diverse, high-load applications. Miter gears, restricted to a 1:1 ratio and usually straight teeth, are simpler and best for equal-speed, lighter-duty tasks. Bevel gears require more complex manufacturing, especially for spiral or hypoid types, while miter gears are easier to produce. Choosing between them depends on the application's ratio, load, and speed requirements.
 |
 |
| Kegelradgetriebe | Miter Gear |
