20CrMnTi High Precision Spiral Bevel Gears High-speed & Heavy-load Fields

Spiral Bevel Gears (also known as spiral bevel gears) are core precision transmission components for power transmission between intersecting shafts (usually 90°). With curved spiral teeth, they feature smoother transmission, higher load capacity and lower noise than straight bevel gears, widely used in high-speed & heavy-load fields such as automobiles, engineering machinery, reducers, aerospace, ships, etc.

Product Features

• Spiral Curved Tooth Structure: Tooth trace is arc spiral, progressive meshing contact without instantaneous impact
• Shaft Angle Adaptation: Mainly for 90° intersecting shafts; customizable for 30°–150° non-right angle transmission
• High Precision Grade: Industrial grade ISO 5–7 (GB/T 11365), precision grade up to 3–5
• Composite Load Capacity: Transmit torque while bearing radial & axial forces with balanced stress
• Low Noise & Smoothness: Large contact ratio, multi-tooth meshing, small vibration & shock, 10–15dB lower noise than straight teeth
• High Efficiency & Durability: Transmission efficiency 95%–98%, wear-resistant, anti-pitting, long service life
• Diverse Materials: Mainly alloy structural steels (20CrMnTi, 20CrMo, 42CrMo), strengthened by induction/carburizing quenching

Technical Parameter Table

Working Principle

• Spatial Meshing Transmission: Axes intersect (usually 90°), teeth distributed conically & spirally, realizing vertical direction change + torque transmission
• Progressive Meshing: Teeth engage gradually from end, full contact, smooth disengagement—no instantaneous impact, smoother than straight teeth
• Multi-tooth Load: Contact ratio ε=1.5–2.5, 2–3 tooth pairs loaded simultaneously, uniform load distribution & higher capacity
• Force Balance: Generate tangential, radial & axial forces; matched bearings required to support axial thrust
• Constant Ratio: Tooth ratio = inverse speed ratio (i=Z₂/Z₁=n₁/n₂), accurate & stable transmission

Main Applications

• Automotive: Differentials, transfer cases, drive axles (core application)
• Engineering Machinery: Main reducers, steering, winch systems of excavators, loaders, rollers
• Industrial Reducers: K/S series spiral bevel gearboxes, gear diverters, speed increasers
• Machine Tools: Spindle drive, feed mechanisms, tool changer diverters of boring/milling/grinding machines
• Aerospace: Aircraft landing gear, engine drive, helicopter tail rotor systems
• Marine: Propulsion, steering gear, windlass, hatch cover drive
• New Energy: Wind turbine yaw/pitch, PV tracker drive, energy storage equipment
• Others: High-speed & heavy-load transmission in printing, textile, food, petroleum, metallurgy, rail transit

Product Advantages

• High-Speed Stability: Progressive meshing, low shock, suitable for 3000–12000rpm ultra-high speed
• Heavy Load Capacity: 30%–60% higher load capacity than straight bevel gears, anti-bending, anti-pitting, impact-resistant
• Ultra-Low Noise: Precision ground/lapped teeth, noise 60–70dB, 10–15dB lower than straight teeth
• High Efficiency & Energy Saving: Efficiency 95%–98%, 3%–8% higher than ordinary bevel gears, long-term power saving
• Precise Transmission: Constant ratio, small backlash (0.02–0.1mm), high positioning accuracy
• Compact Structure: Spatial direction change, space-saving, ideal for lightweight & compact equipment
• Long Service Life: High-quality steel + strengthened heat treatment, 40%–80% longer life than ordinary gears
• Wide Adaptability: Designable for 90°/non-90° shafts, single/multi-stage, reduction/increase/diversion

Why Choose us?

• 7-axis CNC Grinding: We adopt high-precision 7-axis CNC grinding machines, holding tolerances as tight as ±5μm, ensuring gears run quietly, smoothly and with outstanding durability.
• Strong technical expertise: Our core R&D team includes doctoral and master’s professionals specializing in spiral bevel gear technology, providing strong technical support for complex projects.
• Rigorous testing & high precision: All gears undergo 100% inspection with Gleason metrology systems. We can achieve DIN 6 grade accuracy with strict control over tooth profile and direction errors, keeping our quality at the industry-leading level.
• High transmission efficiency: Our gear designs support a single-stage reduction ratio of up to 300:1, with actual transmission efficiency reaching over 95%, greatly improving energy utilization.
• Excellent durability & cost efficiency: Our gears deliver 40% lower lifecycle cost and a failure rate below 0.5%, ensuring stable long-term operation and reduced maintenance costs.
• Fast response & short lead time: Supported by our digitalized production process, we are able to shorten the delivery cycle to only 20 working days, helping you accelerate project development and launch.
• Professional custom design capability: We provide fully customized gear solutions for applications requiring high-reduction, high-speed, heavy-load, low-noise, and special small-tooth profiles, based on your actual working conditions.