How do I know what size sprocket I need for my chain?
Choosing the right sprocket size for your chain comes down to matching the chain pitch and tooth count to your bike or machine’s gearing needs.
IATF 16949 & ISO 9001:2015 Certified Factory
Power Transmission Components Built for Industrial OEMs Who Cannot Afford Downtime
Raydafon Technology Group Co., Limited manufactures sprockets, chains, gear racks, couplings, pulleys, hydraulic cylinders and gearboxes from 3 production bases in Ningbo, Jiangsu and Tianjin. Founded in 2006, we ship to 120+ countries with a 98% on-time delivery rate and 24-hour engineering response.
MOQ
10–20
pcs Custom Parts
Lead Time
3–6 wks
Bulk OEM Orders
FOB Port
Ningbo
or Shanghai, China
Payment
T/T · L/C
30% Deposit
Response
24 h
Engineering Reply
Industry Applications
Where Our Components Are Used
Six industries we engineer for. Each project starts with the equipment, load and working environment — not with a part number.
01
Heavy Industry & Mining
Case-hardened sprockets up to 2000 mm OD, ANSI/DIN/ISO roller chains, conveyor chains and ATEX-certified couplings for mining, steel mills and mineral processing.
Explore Sprockets →
02
Agricultural & Tractor Machinery
Gearboxes up to 180 HP, ASAE-standard PTO shafts, agriculture chains and sprockets for rotary cultivators, mowers, balers and harvesters. John Deere, Kubota and Case IH compatible.
Explore Gearboxes →
03
Industrial Automation
Module 0.5–20 gear racks up to 6 meters, couplings up to 10,000 Nm, helical and bevel gears, timing pulleys and locking assemblies with sub-micron accuracy.
Explore Gear Racks →
04
Fluid Power & Compressed Air
Air compressors 0.5–100 m³/min up to 50 bar, Class 0 oil-free certified to ISO 8573-1, Roots and screw vacuum pumps, hydraulic cylinders rated to 350 bar.
Explore Compressors →
05
Material Handling & Logistics
Welded steel conveyor chains, pintle and leaf chains, V-belt pulleys, timing pulleys and taper lock bushings for warehouse, packaging and food processing automation.
Explore Conveyor Chains →
06
Custom OEM & Special Projects
Send a sample or competitor part number. Our engineers measure, model in CAD, match material and heat treatment, and return a cross-reference drawing before tooling starts.
Request a Quote →Verified Credentials
Certifications that survive a customer audit
Every shipment can carry dimensional inspection reports, hardness certificates and material traceability documents. Ask for them at the PO stage — not after arrival.
IATF 16949
Automotive Certified
ISO 9001:2015
Quality Management
CE Marking
European Market
ATEX II 2G
Explosive Atmospheres
Engineering FAQ
Answers our engineers give every week
Send your drawing or sample and we will respond with a technical proposal and factory-direct quotation within 24 hours.
Send Your Drawing →Can you produce sprockets with custom pitch diameters?
Yes. Up to 2000 mm outside diameter, MOQ from 10 units. ANSI, DIN, ISO and JIS tooth profiles available in case-hardened alloy steel at 45–55 HRC, stainless steel 304/316, or cast iron.
What is your MOQ and lead time for custom parts?
10–20 units for custom sprockets and gear racks, 5 units for air compressors. Standard stock ships in 7–14 days. Custom OEM orders: 3–6 weeks after drawing approval.
Do you offer OEM and ODM customization?
Yes. Send drawings, a working sample, or a competitor part number. We return a cross-reference drawing before tooling starts. Free feasibility review, 24-hour quote response.
How do you ensure product quality?
Incoming raw material spectrometer analysis, in-process CMM dimensional checks, 100% final load and fatigue testing, plus random audits by our IATF 16949 certified team. Every batch ships with material certificates.
What are your payment and shipping terms?
T/T or L/C with 30% deposit. FOB Ningbo or Shanghai. Our 3 regional hubs in Ningbo, Jiangsu and Tianjin ensure 3–6 week lead times for bulk orders. Repeat OEM customers can negotiate vendor-managed inventory.
Precision Power Transmission Components
Discover our full range of sprockets, gear racks, couplings, air compressors, and hydraulic cylinders – engineered for industrial automation, energy, and heavy machinery.
CouplingsWe manufacture couplings designed to transmit torque, compensate for misalignment, and protect your equipment from shock loads. With decades of expertise in power transmission, our couplings are engineered to meet the demands of industrial automation, energy, and transportation. Let us help you optimize your drive systems with reliability and efficiency.
Product Classification
We categorize our couplings to simplify your procurement process:
-
By Function
- Rigid Couplings: For zero-backlash, high-precision alignment.
- Flexible Couplings: Absorb shock, vibration, and misalignment.
- Fluid Couplings: Provide smooth starts and overload protection.
-
By Material
- Steel Alloys: High-strength 42CrMo4 and C45 grades for heavy loads.
- Stainless Steel: Corrosion-resistant options for marine or chemical environments.
- Aluminum: Lightweight solutions for high-speed applications.
-
By Application
- Industrial Automation: CNC machinery, robotic arms.
- Energy: Wind turbines, pumps, compressors.
- Transportation: Electric vehicles, railway systems.
Product Introduction
Why choose Raydafon couplings?
Couplings are mechanical components that connect two shafts to transmit power while accommodating misalignment, reducing wear, and protecting connected equipment. Our designs prioritize precision, durability, and safety, making them ideal for critical applications where downtime is not an option.Key Design Principles:
- Torque Transmission: Optimized tooth profiles and materials for high-efficiency power transfer.
- Misalignment Compensation: Flexible elements absorb angular, parallel, and axial shaft deviations.
- Safety First: Fail-safe designs to prevent catastrophic equipment damage.
Product Features
1. Material Excellence
- High-Grade Alloys: 42CrMo4 steel for 500%+ nominal torque resistance.
- Protective Coatings: Zinc plating and anti-corrosion finishes for longevity.
2. Customization Flexibility
- Tailored Specifications: Adjust bore size, keyway, and torque rating to your needs.
- Certified Engineering: Our ISO-certified team designs couplings for your exact speed, load, and environmental requirements.
3. Smart Integration
- IoT-Ready Design: Pre-drilled holes for sensors (compatible with Raydafon’s SmartDrive platform).
- Universal Compatibility: Works with third-party motors, gearboxes, and shafts.
4. Certifications & Standards
- ISO 9001 (Quality Management)
- CE Marking (EU Safety Compliance)
- ATEX Certification (Explosive Atmospheres)
Product Advantages
1. Performance
- 99%+ Efficiency: Low-friction designs minimize energy loss.
- Vibration Damping: Flexible elements reduce noise and extend bearing life.
2. Global Support Network
- 24/7 Engineering Assistance: Our ISO-certified team supports you in 28 countries.
- JIT Delivery: Three regional hubs ensure 3–6 week lead times for bulk orders.
3. Cost Optimization
- Vendor-Managed Inventory (VMI): Reduce upfront costs and stockouts.
- 92% Client Retention: Trusted by Fortune Global 500 companies in automation and energy.
Application Areas
Industry Use Case Why Procure Raydafon? Automation CNC machinery, robotic arms Zero-backlash, 24/7 support Energy Wind turbines, pumps, compressors Corrosion-resistant, shock-absorbing designs Transportation Electric vehicles, railway systems Lightweight aluminum, high-speed performance Marine Propulsion systems, winches ATEX-certified, saltwater-resistant
Frequently Asked Questions (FAQs)
Q1: Can Raydafon manufacture couplings for custom torque ratings?
Yes. We engineer couplings up to 10,000 Nm torque capacity, tailored to your specifications.
Q2: What is the minimum order quantity (MOQ) for custom couplings?
Flexible MOQs start at 20 units, with vendor-managed inventory for bulk buyers.
Q3: How do Raydafon couplings handle misalignment?
Our flexible couplings absorb angular, parallel, and axial misalignment up to 3°, reducing bearing wear.
Q4: Do you offer predictive maintenance for coupling systems?
Yes. SmartDrive IoT monitors temperature, vibration, and torque spikes in real time.
Q5: Are Raydafon couplings compatible with third-party motors?
Yes. Universal designs ensure compatibility while offering 40%+ durability gains over market averages.
Technical Specifications
Parameter Details Material 42CrMo4 steel, C45 steel, stainless steel, aluminum Torque Range 10 Nm – 10,000 Nm Bore Size 10mm – 200mm (customizable) Temperature Range -40°C to +200°C Certifications ISO 9001, CE, ATEX -
By Function
Air CompressorsWe manufacture air compressors designed to deliver high-efficiency, low-maintenance compressed air for industrial, commercial, and specialty applications. With decades of expertise in power transmission and fluid dynamics, our compressors are engineered to optimize energy use, reduce downtime, and meet the stringent demands of modern manufacturing. Let us help you upgrade your pneumatic systems with cutting-edge technology.
Product Classification
We categorize our air compressors to simplify your procurement process:
-
By Technology
- Reciprocating (Piston) Compressors: Ideal for small-scale, intermittent use.
- Rotary Screw Compressors: Continuous-duty performance for factories and workshops.
- Centrifugal Compressors: High-flow, oil-free solutions for power plants and chemical plants.
-
By Lubrication
- Oil-Injected: Cost-effective, general-purpose use.
- Oil-Free: Certified for food-grade, medical, and electronics manufacturing.
-
By Application
- Industrial: Automation, CNC machinery, assembly lines.
- Commercial: Auto shops, dry cleaners, dental clinics.
- Specialty: Underwater breathing, HVAC, and aerospace testing.
Product Introduction
Why choose Raydafon air compressors?
Air compressors convert power into potential energy by compressing air, which is then used to operate tools, machinery, and processes. Our designs prioritize energy efficiency, reliability, and low noise, making them ideal for 24/7 operations where uptime and cost control are critical.Key Design Principles:
- Efficiency: Variable Speed Drives (VSD) reduce energy consumption by up to 35%.
- Durability: Stainless steel and corrosion-resistant components for longevity.
- Safety: ATEX-certified models for hazardous environments.
Product Features
1. Energy Efficiency
- VSD Technology: Matches air output to demand, slashing energy costs.
- Heat Recovery Systems: Reuse waste heat for workshop heating or water preheating.
2. Reliability
- Low-Maintenance Design: Oil-free models eliminate costly filtration and disposal.
- Smart Controls: IoT-enabled monitoring for predictive maintenance.
3. Customization
- Tailored Solutions: Adjust pressure, flow rate, and footprint to your facility.
- Certified Engineering: Our ISO-certified team designs compressors for your exact needs.
4. Certifications & Standards
- ISO 9001 (Quality Management)
- CE Marking (EU Safety Compliance)
- ATEX Certification (Explosive Atmospheres)
- Class 0 Oil-Free (ISO 8573-1)
Product Advantages
1. Cost Savings
- 35% Lower Energy Bills: VSD technology pays for itself in 2–3 years.
- Zero Oil Contamination: Oil-free models avoid product recalls and rework.
2. Global Support Network
- 24/7 Engineering Assistance: Our ISO-certified team supports you in 28 countries.
- JIT Delivery: Three regional hubs ensure 3–6 week lead times for bulk orders.
3. Sustainability
- Carbon-Neutral Options: Solar-compatible models for green manufacturing.
- 95% Recyclable: Designed for eco-friendly disposal.
Application Areas
Industry Use Case Why Procure Raydafon? Automotive Paint spraying, tire inflation, assembly tools VSD technology, 24/7 reliability Food & Beverage Bottling, packaging, fermentation Class 0 oil-free, ATEX-certified Medical Ventilators, dental tools, lab equipment Ultra-clean air, whisper-quiet operation Construction Jackhammers, nail guns, concrete finishing Portable, diesel-driven models
Frequently Asked Questions (FAQs)
Q1: Can Raydafon compressors handle intermittent use?
Yes. Our reciprocating compressors are ideal for small-scale, on-demand applications.
Q2: What is the minimum order quantity (MOQ) for custom compressors?
Flexible MOQs start at 5 units, with vendor-managed inventory for bulk buyers.
Q3: How do Raydafon compressors reduce energy costs?
VSD technology adjusts output to demand, cutting bills by up to 35%.
Q4: Do you offer predictive maintenance for compressor systems?
Yes. SmartDrive IoT monitors vibration, temperature, and oil quality in real time.
Q5: Are Raydafon compressors compatible with third-party pneumatic tools?
Yes. Universal designs ensure compatibility while offering 40%+ durability gains over market averages.
Technical Specifications
Parameter Details Technology Reciprocating, rotary screw, centrifugal Pressure Range 5–50 bar (customizable) Flow Rate 0.5–100 m³/min Certifications ISO 9001, CE, ATEX, Class 0 Oil-Free -
By Technology
About Raydafon Group
Global Leader in Power Transmission & Industrial Drive Solutions
Raydafon Group: Your Global Partner in Precision Power Transmission Solutions
Raydafon Technology Group Co., Limited is a China-based ISO 9001:2015 certified manufacturer of industrial power transmission components, established in 2006 in Ningbo, Zhejiang — China's premier precision manufacturing region.
For 20 years, we have engineered and supplied sprockets, roller chains, conveyor chains, gearboxes, gear racks, couplings, and related transmission components to industrial buyers in 100+ countries. Our products meet ANSI, ISO, DIN, and JIS dimensional standards.
As a factory-direct supplier, we offer competitive pricing, low MOQ, OEM and ODM customization, and engineering consultation from drawing to delivery. CE-certified products available for European markets; ATEX-rated components available for hazardous environments.
Transmissions China is your direct link to 20 years of precision manufacturing expertise — no middlemen, no compromises.
Raydafon Group: Precision Power Transmission Since 2006
- 3 manufacturing bases (Ningbo, Jiangsu, Tianjin)
- 280+ employees, 35+ R&D engineers
- Certified: IATF 16949, ISO 9001, CE, ATEX
- Serving 100 countries, 500+ active customers
- 98% on‑time delivery rate, average lead time 3–6 weeks
- 24/7 technical support with response within 4 hours
Raydafon at a Glance
| Founded | 2006 |
| Manufacturing Bases | 3 (Ningbo, Jiangsu, Tianjin) |
| Employees / R&D | 280+ / 35+ |
| Certifications | IATF 16949, ISO 9001, CE, ATEX |
| Export Countries | 100+ |
| On-Time Delivery | 98% |
Request a Quote or Technical Consultation
Fill out the form below, and our engineers will respond within 24 hours with a tailored solution for your project.
Industry Updates & Technical Insights
Stay informed with the latest trends in power transmission, gearbox technology, and automation solutions
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