What is a Spur Gear?
A spur gear features straight teeth parallel to the shaft axis, meshing with another spur gear or pinion to transmit rotational motion between parallel shafts. Yantong Tech manufactures spur gears with controlled involute profile, consistent heat treatment, and dimensional verification, ensuring reliable torque transfer and predictable service life in general machinery, conveyors, reducers, agricultural equipment, and material handling systems.
- Precision hobbing and gear grinding achieve ISO 1328 Grade 6–9 accuracy for stable meshing and low noise
- Carburizing or induction hardening provides HRC 58–62 surface hardness with controlled case depth for wear resistance
- Full dimensional and tooth profile inspection data archived by batch for traceability and quality assurance
- Module range m0.5–m12, face width 10–300 mm, supporting custom bore, keyway, and mounting configurations
Core Characteristics and Performance Advantages
Engineering features enabling efficient power transmission, controlled backlash, and predictable service life
Controlled Tooth Accuracy
Gear hobbing and grinding processes maintain involute profile, pitch, and lead consistency to ISO 1328 Grade 6–9, reducing transmission error and ensuring uniform load distribution across the tooth flank.
Verified Surface Integrity
Carburizing or induction hardening achieves HRC 58–62 surface hardness with controlled case depth; hardness and metallography validated per specification to confirm freedom from quench cracks or excessive distortion.
Flexible Design Adaptation
Module range m0.5–m12, pitch diameter 10–800 mm, face width 10–300 mm, supporting custom bore tolerance (IT6–IT8), keyway dimensions, and mounting hole patterns per customer drawing.
Technical Specifications and Manufacturing Range
Comprehensive parameter overview for engineering evaluation and design integration
| Item | Specification Range | Remarks |
|---|---|---|
| Pitch Diameter | 10 mm – 800 mm | Custom sizes per customer drawing |
| Module | m0.5 – m12 | Standard or customer-specified |
| Number of Teeth | 12 – 300 | Adjustable per transmission ratio |
| Face Width | 10 mm – 300 mm | Per load requirements |
| Pressure Angle | 20° (standard) / 14.5° or custom | 20° most common for general machinery |
| Tooth Accuracy | ISO 1328 Grade 6 – Grade 9 | Grade 6–7 for ground, 7–9 for hobbed |
| Materials | 20CrMnTi / 42CrMo / 40Cr / C45 | Material composition customizable |
| Heat Treatment | Carburizing / Induction Hardening / Tempering | Enhances wear resistance and fatigue life |
| Surface Hardness | HRC 58–62 (Carburized) HRC 50–55 (Induction) |
Dependent on material and process |
| Surface Roughness | Ra 0.8 – 3.2 μm | Achieved after hobbing or grinding |
| Inspection | CMM / Gear Measuring Center / Profile Projector | Inspection reports provided |
Custom Manufacturing Capability for Spur Gears
Four core competencies supporting OEM machinery, reducer manufacturers, and industrial equipment builders
Design & Engineering Capability
Gear geometry calculation, module and tooth number optimization, involute profile modification, and reverse engineering from samples or worn parts for OEM replacement or design improvement.
Precision Machining
CNC gear hobbing for high-volume production, gear shaving for improved surface finish, and gear grinding for high-accuracy applications; dimensional inspection on gear measurement centers to ensure batch consistency.
Material & Heat Treatment Options
Standard alloy steels (20CrMnTi, 42CrMo, 40Cr, C45) with carburizing, induction hardening, or tempering; case depth and hardness validated per drawing; material traceability reports provided with shipment.
Testing & Technical Support
Full dimensional and tooth profile data archived; CMM and gear measurement center reports; remote technical consultation for assembly guidance, load analysis, and performance feedback.
Manufacturing Process: From Raw Material to Verified Spur Gear
Six controlled stages ensuring dimensional consistency, surface integrity, and full traceability
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.
Turning & Rough Machining
CNC turning establishes outer diameter, bore, and mounting surfaces to near-final dimensions. First-piece inspection confirms toolpath accuracy before batch production, ensuring dimensional consistency across all parts in the lot.
Gear Hobbing / Gear Shaping
CNC gear hobbing cuts straight teeth per involute profile; module, pressure angle, and tooth thickness controlled to drawing specification. Gear shaping used for blind bores or special geometries. In-process checks monitor tooth thickness and profile form.
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.
Finish Grinding & Gear Shaving
CNC gear grinding (for precision grades) or gear shaving (for high-volume production) corrects distortion from heat treatment and achieves final tooth profile accuracy (ISO 1328 Grade 6–7). Bore and mounting faces ground or honed to final tolerance.
Final Inspection & Documentation
Gear measurement center records involute profile, pitch, and lead data; CMM verifies bore and mounting dimensions; surface hardness and case depth measured. Inspection certificate, material traceability, and heat treatment report prepared for shipment.
Quality Control and Inspection System
Five-stage verification protocol ensuring batch consistency 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.
Machining Accuracy Check
First-piece inspection after each setup confirms dimensional compliance; in-process sampling monitors bore diameter, outer diameter, tooth thickness, and profile form. Statistical process control (SPC) applied to critical dimensions for high-volume runs.
Tooth Profile & Pitch Inspection
Gear measurement center captures involute profile deviation, pitch variation, and lead error. Data compared to ISO 1328 tolerance class or customer-specified limits; out-of-tolerance parts segregated and corrected or scrapped.
Hardness & Surface Treatment Test
Surface hardness (Rockwell C scale) measured at multiple locations; case depth verified via microhardness traverse on sectioned samples. Heat treatment report includes furnace cycle data and test results for traceability.
Final 100% Inspection
Every spur gear subjected to visual inspection for grinding burns, surface defects, and edge quality; dimensional spot-checks confirm bore tolerance and mounting face runout. Full inspection data archived by batch number.
Applications and Industry Integration
Spur gears enabling efficient parallel-shaft power transmission across six core industrial 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 spur gear durability, load capacity, and service life. Yantong Tech applies controlled carburizing, induction hardening, or tempering to achieve specified surface hardness and case depth, with full process documentation for quality assurance.
Design and Engineering Collaboration
Manufacturing engineers supporting gear geometry optimization, tolerance analysis, and reverse engineering for OEM replacement
- Gear geometry calculation and module/tooth number optimization based on load requirements, speed range, and available envelope constraints
- CAD/CAM-based profile design and tolerance control; profile modification analysis for noise reduction and load distribution 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 export documentation support; dimensional clarification and tolerance stack-up analysis to ensure assembly fit and function
What Our Clients Say
Trusted by reducer manufacturers and general machinery OEMs across three continents
We needed precision spur gears with consistent tooth form and stable backlash for our conveyor drive units. Yantong Tech provided full gear measurement data, held tolerances across multiple production runs, and responded professionally to technical inquiries. That consistency is critical for our long-term partnership.
Our agricultural equipment requires robust spur gears that can handle shock loads and seasonal field operation. Yantong's engineering team understood our load conditions and recommended appropriate material and heat treatment. The gears have been performing reliably for two harvest seasons with no premature failures.
We replaced worn spur gears in our packaging line with reverse-engineered parts from Yantong Tech. They measured our samples, matched the material and heat treatment, and delivered gears that fit perfectly. The replacement process caused minimal downtime. Good quality and honest communication throughout.
Why Engineers and Procurement Teams Choose Yantong Tech for Spur Gears
Four core competencies supporting transmission reliability, predictable delivery, and long-term partnership
Proven Manufacturing Capability
96-person team with dedicated gear machining, heat treatment validation, and gear measurement facilities; module range m0.5–m12, pitch diameter up to 800 mm, ISO 1328 Grade 6–9 accuracy achievable through controlled process.
Full Traceability & Documentation
Material certificates (EN 10204 3.1), heat treatment cycle reports, gear measurement data archived by batch; ISO 9001 quality system with documented corrective action and continuous improvement process.
Engineering-Focused Communication
Manufacturing engineers with gear design background engage directly with customer technical teams; drawing clarification, tolerance analysis, and manufacturability feedback provided before quotation to avoid misunderstanding.
Realistic Pricing & Delivery
Quotations based on actual drawing complexity, material specification, and heat treatment requirements; lead time commitments honored through rolling safety stock for standard modules 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 Spur 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 material, heat treatment, accuracy grade, and any special requirements. Our engineering team reviews for manufacturability within 24 hours.
Initial Contact
Drawing review and feasibility confirmation
Technical Clarification
Engineering dialogue and tolerance verification
Technical Review & Proposal
Our manufacturing engineers discuss drawing details, clarify tolerances, and recommend process approach (hobbing vs. grinding, heat treatment method). Any manufacturability concerns or improvement suggestions communicated before quotation.
Quotation & Lead Time Confirmation
Detailed quotation provided with breakdown of material, machining, heat treatment, 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, and heat treatment validation performed at each stage. Production milestones updated for customer visibility on lead time status.
Inspection & Quality Documentation
Final 100% inspection including gear measurement, dimensional verification, hardness testing, and visual examination. Inspection certificates, material traceability, and heat treatment reports 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, 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 Spur Gears?
Send your drawing and receive an engineering reply within 24 hours — no obligation, just transparent technical dialogue.
- Precision manufacturing: Module m0.5–m12, pitch diameter up to 800 mm, ISO 1328 Grade 6–9 accuracy
- Controlled heat treatment: Carburizing, induction hardening, or tempering with full process documentation
- Complete traceability: Material certificates, gear measurement data, and heat treatment reports by batch
- Engineering support: Reverse engineering, profile modification analysis, and tolerance optimization
- ISO 9001 certified with IATF 16949 methods for automotive-level quality assurance