Zerol Zero-Angle Bevel Industrial Gear Set for Precision 90-Degree Power

Product Specification

Zerol Zero-Angle Bevel Industrial Gear Set for Precision 90-Degree Power Transmission

Zerol bevel gear is a special type of spiral bevel gear with midpoint spiral angle = 0°. Its tooth trace is curved but without helical inclination, intermediate between straight bevel and standard spiral bevel gears. It retains curved-tooth continuous meshing and point contact, while axial force is nearly zero, enabling interchangeability with straight bevel gear bearing systems. Made of 40Cr, 20CrMnTi, 42CrMo with carburizing/induction hardening, it features smooth transmission, low noise, no axial thrust, moderate load capacity and easy installation. Widely used for intersecting shaft (typically 90°) power transmission, forward/reverse rotation, limited space and bearing load-sensitive precision drive applications.

Product Features

• Zero spiral angle: Midpoint spiral angle βm=0°, curved tooth trace without axial force, bi-directional transmission without thrust.
• Curved tooth + point contact: Gleason curved teeth with local point contact, adjustable contact pattern, avoid stress concentration.
• Smooth & low noise: Gradual meshing, low impact, 5–10dB quieter than straight bevel, close to spiral bevel gears.
• No axial force, simple bearings: Axial force ≈0, same as straight bevel, no complex thrust bearings needed, simplified structure.
• Moderate & high strength: Better root strength than straight bevel, load capacity between straight and spiral bevel.
• Interchangeable with straight bevel: Same mounting dimensions and axial force, direct replacement for straight bevel to upgrade smoothness.
• Wide medium-speed adaptation: Recommended peripheral speed ≤5m/s, suitable for agricultural machinery, reducers, machine tools, sewing equipment.
• High precision controllable: Ground to AGMA 14/ISO 5, transmission accuracy ≤10 arcminutes.

Technical Parameter Table

Working Principle

• Zero spiral angle meshing: Midpoint spiral angle = 0°, teeth curved but without axial tilt, no axial force during meshing; bearings carry only radial loads.
• Progressive point contact: Gleason curved teeth engage gradually from one end to full tooth contact, low impact, vibration and noise.
• Constant transmission ratio: Cone vertices coincide with spherical involute teeth, constant instantaneous ratio for precise motion.
• Symmetric bi-directional drive: Symmetric loading in forward/reverse rotation, no unilateral thrust, suitable for frequent reversing and dual drive.
• Adjustable contact pattern: Contact zone controlled via axial/radial fine adjustment during assembly, avoiding edge contact and stress concentration.

Main Applications

• Industrial sewing machines: 90° angle drive for high-head, double-needle and sync machines (e.g., 8B/341/6B).
• Agricultural gearboxes: Medium-speed reversing and bi-directional drive for tractors and harvesters, simplified bearing design.
• Precision reducers: Right-angle planetary reducers and servo angle units, low noise and no axial thrust.
• Machine tools: 90° spindle direction and feed mechanisms for drills and mills, smooth and quiet.
• Automotive/EV: Light-duty differentials, steering mechanisms and electric tailgates, bi-directional low-thrust drive.
• Precision instruments: Radar antennas, optical turntables and medical equipment, accurate angle and low vibration.
• Textile/food machinery: Intersecting shaft drive and frequent forward/reverse for finishing and packaging machines.
• Straight bevel upgrade: Replacement for old straight bevel gears to improve smoothness, reduce noise and reuse bearings.

Product Advantages

• Zero axial force, lower bearing cost: No helical thrust, compatible with straight bevel bearing systems, simple structure and low cost.
• Smooth & quiet, better experience: Progressive curved tooth meshing, 5–10dB quieter than straight bevel, close to spiral bevel gears.
• Bi-directional symmetry, durable reversing: Balanced forward/reverse loading, no unilateral wear in frequent reversing, long service life.
• Adjustable point contact, anti-fracture: Local contact + adjustable pattern, avoid stress concentration, strong impact resistance.
• Straight bevel compatible, easy upgrade: Same mounting dimensions, direct replacement without redesign.
• Medium-speed efficient, low energy: Recommended ≤5m/s, efficiency ≥94%, more energy-saving than spiral bevel gears.
• Controllable precision, accurate drive: Ground to AGMA 14, angle error ≤10 arcminutes, precise positioning.
• Low maintenance, cost-effective: No axial thrust, minimal bearing wear, longer lubrication intervals, low failure rate.

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.