What is a Bevel Gear?
A bevel gear features conical tooth forms that enable power transmission between intersecting shafts, typically at 90 degrees. Yantong Tech manufactures straight, spiral, and Zerol bevel gears with controlled tooth contact patterns, verified heat treatment integrity, and documented gear measurement data, ensuring smooth load transfer and extended service life in construction machinery, automotive differentials, mining equipment, and heavy-duty angular drive systems.
- Precision tooth contact control through CNC milling or gear planing, achieving predictable meshing and reduced noise in right-angle drives
- Carburizing or induction hardening provides HRC 58–62 surface hardness with controlled case depth, supporting high shock loads and extended fatigue life
- Full dimensional and tooth contact inspection data archived by batch for quality traceability and failure analysis support
- Custom shaft interfaces, bore tolerances (IT6–IT8), and mounting dimensions designed to match customer assembly requirements
Core Characteristics and Performance Advantages
Engineering features enabling high-torque angular transmission, shock resistance, and predictable service life in demanding environments
Verified Tooth Contact Pattern
CNC spiral milling or gear planing with tooth contact verification ensures uniform load distribution across the face width, minimizing edge stress concentration and extending service life under high-torque angular loads.
Controlled Surface Hardness
Carburizing or induction hardening with validated case depth (0.8–2.0 mm) and surface hardness (HRC 58–62) ensures resistance to pitting, scoring, and shock loads; hardness traverse data provided for critical applications.
Flexible Design Integration
Module range m1–m12, shaft angles 90° (standard) or custom, spiral angle 0–35° to balance load capacity and efficiency; mounting dimensions and tolerances matched to customer housing design.
Technical Specifications and Manufacturing Range
Comprehensive parameter overview for engineering evaluation and angular drive system design
| Item | Specification Range | Remarks |
|---|---|---|
| Outer Diameter | 30 mm – 600 mm | Custom sizes per customer drawing |
| Module | m1 – m12 | Straight, spiral, or Zerol tooth form |
| Number of Teeth | 12 – 120 | Ratio range 1:1 to 1:10 available |
| Shaft Angle | 90° (standard), custom angles available | 45°, 60°, 120° by request |
| Spiral Angle | 0° – 35° | 0° = straight bevel; 35° = spiral bevel |
| Tooth Accuracy | AGMA 10–13 / DIN 6–9 | Inspection report available |
| Materials | 20CrMnTi / 42CrMo / 18CrNiMo7-6 / C45 | Material composition customizable |
| Heat Treatment | Carburizing / Induction Hardening / Nitriding | Enhances surface hardness and fatigue resistance |
| Surface Hardness | HRC 58–62 (Carburized) HRC 50–55 (Induction) |
Dependent on material and heat treatment |
| Surface Roughness | Ra 1.6 – 3.2 μm | Post-milling or grinding finish |
| Inspection | CMM / Gear Rolling Tester / Contact Pattern Check | Inspection reports provided |
Custom Manufacturing Capability for Bevel Gears
Four core competencies supporting OEM angular drives, heavy equipment, and high-torque transmission assemblies
Design & Engineering Capability
Bevel gear geometry calculation, ratio optimization, tooth contact simulation, and reverse engineering from samples or worn parts for OEM replacement and aftermarket supply.
Precision Machining
CNC spiral milling, gear planing, or face hobbing for controlled tooth contact; post-heat-treatment grinding available for high-accuracy applications requiring AGMA 11 or better.
Material & Heat Treatment Options
Standard alloy steels (20CrMnTi, 42CrMo, 18CrNiMo7-6) with carburizing or induction hardening; case depth and hardness validated per drawing; material traceability reports provided with shipment.
Testing & Technical Support
Full dimensional and tooth contact data archived; CMM and gear rolling tester reports; remote technical consultation for assembly guidance, backlash adjustment, and performance feedback.
Manufacturing Process: From Raw Material to Verified Bevel Gear
Six controlled stages ensuring tooth contact accuracy, surface integrity, and full traceability for angular drive applications
Raw Material Preparation
Incoming steel (20CrMnTi, 42CrMo, or customer-specified grade) validated with mill certificates; chemical composition and initial hardness verified before release to machining. Material lot numbers recorded for batch traceability and failure analysis support.
Turning & Blank Preparation
CNC turning establishes cone angle, root cone, mounting surfaces, and shaft interfaces to near-final dimensions. First-piece inspection confirms toolpath accuracy before batch production, ensuring dimensional consistency and controlled stock allowance for heat treatment compensation.
Tooth Cutting (Milling or Planing)
CNC spiral milling, gear planing, or face hobbing machines conical teeth per design specification; spiral angle, pressure angle, and tooth thickness controlled to drawing tolerance. In-process checks monitor tooth depth and profile form to ensure meshing compatibility.
Heat Treatment (Carburizing or Induction Hardening)
Parts undergo carburizing (gas or vacuum) to achieve HRC 58–62 surface hardness with specified case depth, or induction hardening for selective tooth flank hardening. Heat treatment cycles documented; hardness and case depth verified on test coupons and production samples to ensure fatigue resistance.
Tooth Contact Pattern Verification
Prussian blue or marking compound applied to verify tooth contact location, length, and distribution across face width. Contact pattern evaluated against design specification; adjustments made through selective lapping or profile modification if pattern deviates from target zone.
Final Inspection & Documentation
Gear rolling tester or CMM verifies dimensional accuracy, runout, and backlash; surface hardness and case depth measured per specification; visual inspection for grinding burns, cracks, or surface defects. Full inspection data archived by batch number with material certificates and heat treatment reports prepared for shipment.
Quality Control and Inspection System
Five-stage verification protocol ensuring batch consistency, tooth contact accuracy, and full traceability from material to shipment
Raw Material Verification
Mill certificates validated against order specification; chemical composition spot-checked via spectrometer; hardness measured to confirm annealing condition. Material accepted only when documentation and test results meet requirements; lot numbers recorded for traceability.
Machining Accuracy Check
First-piece inspection after each setup confirms dimensional compliance to drawing; in-process sampling monitors cone angle, tooth depth, root diameter, and mounting surface runout. Statistical process control (SPC) applied to critical dimensions for high-volume runs to ensure batch consistency.
Tooth Contact Pattern Inspection
Contact pattern checked using Prussian blue or marking compound to verify meshing location, contact length, and distribution across face width. Pattern evaluated against design target zone; out-of-specification parts segregated for corrective action or rework through selective lapping.
Hardness & Surface Treatment Test
Surface hardness (Rockwell C scale) measured at multiple locations on tooth flanks; case depth verified via microhardness traverse on sectioned samples or non-destructive eddy current testing. Heat treatment report includes furnace cycle data and test results for traceability and failure analysis support.
Final 100% Inspection
Every bevel gear subjected to visual inspection for grinding burns, surface defects, and edge quality; dimensional spot-checks confirm mounting surface runout and backlash compliance. Magnetic particle or dye penetrant testing available for critical applications to detect surface cracks. Full inspection data archived by batch number.
Applications and Industry Integration
Bevel gears delivering efficient angular power transmission, shock resistance, and reliable torque transfer across six core sectors
Certifications and Quality Standards
Recognized quality systems and compliance documentation supporting international procurement requirements
ISO 9001:2015
IATF 16949 Methods
Material Traceability (EN 10204 3.1)
RoHS / REACH Compliance
Material Selection and Heat Treatment Process
Material composition and heat treatment directly determine bevel gear load capacity, shock resistance, and service life. Yantong Tech applies controlled carburizing or induction hardening to achieve specified surface hardness and case depth, with full process documentation for quality assurance.
Design and Engineering Collaboration
Manufacturing engineers supporting bevel gear geometry optimization, contact pattern simulation, and reverse engineering for OEM replacement
- Bevel gear geometry calculation and ratio optimization based on shaft angle, torque requirements, speed range, and installation envelope constraints
- CAD/CAM-based tooth contact simulation and spiral angle selection for noise reduction, load capacity optimization, and efficiency improvement
- Reverse engineering from samples or worn parts for OEM replacement; dimensional measurement, material identification, and heat treatment replication with manufacturability recommendations
- Technical drawing verification and mounting interface design support; dimensional clarification, tolerance analysis, and assembly fit validation to ensure proper meshing and alignment
What Our Clients Say
Trusted by construction equipment manufacturers, automotive OEMs, and industrial machinery suppliers across three continents
Our excavator final drive required spiral bevel gears with precise tooth contact and verified hardness. Yantong Tech provided complete contact pattern documentation, held dimensions across three production batches, and responded to our technical questions with clear engineering answers. That consistency is essential for long-term partnership.
We source bevel gears for agricultural machinery differentials that face seasonal high-duty cycles. Yantong's engineering team understood our shock load requirements and recommended appropriate heat treatment for both tooth flanks and root areas. Lead time was competitive and quality has been consistent across multiple orders.
We needed replacement bevel gears for our mixing equipment that were no longer available from the original manufacturer. Yantong reverse-engineered our worn samples, matched the material and heat treatment, and delivered parts that fit perfectly. Communication was clear and delivery was on schedule.
Why Engineers and Procurement Teams Choose Yantong Tech for Bevel Gears
Four core competencies supporting angular drive reliability, predictable delivery, and long-term partnership
Proven Manufacturing Capability
96-person team with dedicated CNC spiral milling, gear planing, heat treatment validation, and contact pattern verification facilities; module range m1–m12, outer diameter up to 600 mm, AGMA 10–13 accuracy achievable through controlled process.
Full Traceability & Documentation
Material certificates (EN 10204 3.1), heat treatment cycle reports, tooth contact verification data, and dimensional inspection results archived by batch; ISO 9001 quality system with documented corrective action and continuous improvement process.
Engineering-Focused Communication
Manufacturing engineers with bevel gear design background engage directly with customer technical teams; drawing clarification, contact pattern analysis, and manufacturability feedback provided before quotation to avoid misunderstanding.
Realistic Pricing & Delivery
Quotations based on actual drawing complexity, tooth contact requirements, material specification, and heat treatment method; lead time commitments honored through rolling safety stock for standard parts and milestone tracking for custom orders.
Packaging and Export Logistics
Four-stage protection protocol ensuring gear integrity from factory to your receiving dock
Corrosion Prevention & Sealed Protection
Surfaces are treated with rust-inhibiting oil or VCI protection depending on transit duration and climate, and each gear is sealed in PE bags with desiccant to control humidity from factory loading to overseas delivery.
Tooth Edge Protection & Anti-Impact Support
Large gears are positioned on rigid pallets or supports that bear the weight, while tooth edges are wrapped or cushioned to avoid contact damage during loading and transport. Wrapping also helps reduce dust and moisture exposure before crating.
Reinforced Crating & Export-Ready Loading
Gears are secured in reinforced plywood crates with proper corner strength and lifting points, and crate dimensions are planned for safe forklift engagement and container loading according to destination requirements.
Frequently Asked Questions About Bevel Gears
Quick answers to common technical and commercial inquiries
Technical Questions
Commercial Questions
How to Start Cooperation with Yantong Tech
A transparent seven-step process from inquiry to ongoing technical support
Send Your Drawing / Specification
Submit technical drawings (PDF, DWG, STEP) or samples via email. Include specifications for module, shaft angle, spiral angle, material, heat treatment, accuracy grade, and any special contact pattern requirements. Our engineering team reviews for manufacturability within 24 hours.
Initial Contact
Drawing review and feasibility confirmation
Technical Clarification
Engineering dialogue and contact pattern verification
Technical Review & Proposal
Our manufacturing engineers discuss drawing details, clarify tolerances, and recommend process approach (spiral milling vs. planing, heat treatment method, contact pattern target). Any manufacturability concerns or improvement suggestions communicated before quotation.
Quotation & Lead Time Confirmation
Detailed quotation provided with breakdown of material, machining, heat treatment, contact pattern verification, and inspection costs. Lead time estimated based on current production schedule. Payment terms and shipping arrangements confirmed.
Commercial Agreement
Transparent pricing and delivery commitment
Manufacturing Phase
Process control and milestone tracking
Production & Machining
Manufacturing executed per documented process plan. First-piece inspection, in-process checks, heat treatment validation, and contact pattern verification performed at each stage. Production milestones updated for customer visibility on lead time status.
Inspection & Quality Documentation
Final 100% inspection including dimensional verification, contact pattern validation, hardness testing, and visual examination. Inspection certificates, material traceability, heat treatment reports, and contact verification data compiled for customer approval before shipment.
Quality Assurance
Full documentation and traceability package
Logistics & Delivery
Protected packaging and export documentation
Packaging & Shipping
Gears packed per export standards (anti-rust coating, foam protection, plywood crates with steel reinforcement). Export documentation prepared for customs clearance. Tracking information provided upon shipment dispatch.
Technical Consultation & After-sales Follow-up
Remote technical support available for assembly guidance, backlash adjustment, installation questions, and performance feedback. Quality issues addressed through root cause analysis and corrective action. Long-term partnership built on continuous improvement and mutual trust.
Ongoing Support
Technical consultation and continuous improvement
Ready to Source High-Quality Bevel Gears?
Send your drawing and receive an engineering reply within 24 hours — no obligation, just transparent technical dialogue.
- Precision manufacturing: Module m1–m12, outer diameter up to 600 mm, AGMA 10–13 accuracy
- Controlled heat treatment: Carburizing, induction hardening, or nitriding with full process documentation
- Verified contact patterns: Tooth contact location and distribution documented for each batch
- Engineering support: Reverse engineering, contact pattern optimization, and mounting interface design
- ISO 9001 certified with IATF 16949 methods for automotive-level quality assurance