Sprockets

Features & Benefits

• Reliable power transmission with chain drives
  Sprockets and chains form a positive-drive system that maintains synchronization between shafts and can transmit power over longer center distances than gear pairs.

• High load capacity and durability
  Properly sized sprockets working with roller chains are widely used in conveyors, agricultural machinery and heavy equipment because they handle high loads and operate reliably in dusty, oily, or abrasive environments.

• Custom tooth forms and chain standards
  DD Gear can manufacture sprockets for standard roller chains (ANSI/ISO), conveyor chains, double- and triple-strand chains, and special chain profiles, with customized tooth counts, pitch diameters, and hub designs.

• Material and surface options for harsh conditions
  From carbon steel sprockets for general machinery to alloy steel or stainless steel sprockets for corrosive or high-load environments, and with options such as induction-hardened teeth and anti-rust coatings, we tailor the design for your duty cycle.

• Precision machining for smooth chain engagement
  Accurate tooth profiles, concentric bores, and controlled runout reduce chain wear, noise, vibration, and risk of jumping teeth, improving system efficiency and extending chain life.

• Prototype and series support
  Flexible MOQ supports new equipment development and pilot runs; once validated, process control and inspection ensure stable quality for series production.

Technical Specifications

Final values are defined according to customer drawings, chain type, and operating conditions.

Applications

• Conveyor and material-handling systems – Chain and sprocket conveyors in automotive and general manufacturing for moving parts, pallets, and finished products along production lines.

• Agricultural machinery – Harvesters, balers, and other implements using chain drives for cutting mechanisms, elevators, and drive systems.

• Construction and mining equipment – Robust sprockets in conveyors, crushers, and tracked vehicles where shock loads and contamination are common.

• Automotive and powertrain systems – Chain-driven timing systems and auxiliary drives where precise phase relationships between shafts must be maintained.

• Robotics and automation – Chain-and-sprocket mechanisms in robots and automated lines providing synchronized motion and position control in compact layouts.

Gear Manufacturing Process

Every custom sprocket is produced under a controlled manufacturing route designed for precision and durability. A typical process flow is:

1. Blank preparation – forging or bar cutting

2. Turning – machining of OD, faces, bore, and hub

3. Tooth cutting – hobbing or milling according to chain standard and tooth count

4. Auxiliary machining – keyways, set-screw holes, bolt patterns, and special features

5. Heat treatment – through hardening or induction hardening of teeth as specified

6. Shot blasting / stress relief – as needed for fatigue and surface preparation

7. Finish machining – grinding or finish turning of critical diameters and faces

8. Cleaning & anti-rust treatment

9. Final inspection & packaging according to the control plan

Precision Gear Customization Process

DD Gear follows a clear, eight-step customization process:

Step 1 – Requirement Collection
Customers provide design requirements, 2D drawings, 3D models, or physical samples, together with basic duty cycle information (torque, speed, life, installation).

Step 2 – Drawing Design & Optimization
Based on the provided drawings or samples, DD Gear prepares or optimizes detailed manufacturing drawings and shares them with the customer for confirmation.

Step 3 – Quotation
After the drawings and technical points are confirmed, we issue a precise quotation covering tooling, piece price, lead time, and quality requirements.

Step 4 – Tooling & Fixture Preparation
Once the price is confirmed, we arrange tooling and fixture production. Any tooling cost is agreed with the customer in advance and can be offset or refunded after mass orders, according to the commercial agreement.

Step 5 – First Sample Approval
After tooling and fixtures are ready, we manufacture the first sample batch—typically within about 30 days—and ship it to the customer for testing.The customer inspects and validates the samples in their gearbox or test bench and provides feedback on dimensions, performance, and any required adjustments.

Step 6 – Mass Production
When the sample is approved, we start mass production according to the agreed production plan and quality standards.

Step 7 – Finished Product Inspection
After production, we inspect hardness, dimensions, runout, tooth accuracy, and other critical characteristics to ensure full compliance with the drawing and standards.

Step 8 – Shipping Arrangement
Once inspection is passed and shipment is approved by the customer, we arrange booking, packaging, and delivery to the specified destination.

Quality Assurance & Inspection

DD Gear applies the same quality philosophy to all precision gears:

• Quality management systems based on ISO 9001 and IATF 16949

• Process control from incoming material to final inspection, including:

  • Material certification and chemical composition checks

  • Hardness and case depth verification after heat treatment

  • Gear measurement for profile, lead, pitch, and runout

  • Surface roughness testing on gear flanks and journals

  • Dimensional inspection with calibrated gauges and CMMs

• Traceability for each batch with inspection records and reports

• Optional documentation such as PPAP/FAIR packs on request

Packaging

Usage & Installation Notes

• Ensure sprocket pitch and tooth form match the selected chain standard.

• Maintain proper chain tension and alignment between driving and driven sprockets to reduce wear and prevent chain jumping.

• Use appropriate lubrication and protection for chain and sprockets, especially in dusty, wet, or corrosive environments.

• Check teeth periodically for wear, hooking, or damage and replace sprockets together with worn chains to avoid premature failure.

Company Strength – DD Gear

• Specialized in small module, high-precision gears and shafts for EVs, humanoid robots, AGVs, and intelligent automation.

• Integrated manufacturing from forging and machining to heat treatment and gear grinding.

• Quality systems aligned with automotive standards, with experience supporting OEM and Tier 1 projects.

• Engineering support covering concept feasibility, DFM reviews, and failure analysis feedback.

• Global export capability with experience serving customers in multiple countries.

Q1: What information do you need for a sprocket quotation?
We normally need sprocket drawings (PDF and, if possible, 3D model), chain type and size, number of teeth, bore/hub requirements, material and surface treatment preferences, expected annual volume, and basic application data (speed, load, environment).

Q2: Can you design sprockets if we only know the chain and ratio?
Yes. If you provide chain standard, required transmission ratio, center distance, and load information, our engineering team can help propose tooth counts, pitch diameters, and hub designs, then finalize drawings with you.

Q3: Do you supply chains together with sprockets?
DD Gear mainly focuses on precision gears, sprockets, and shafts. We normally supply sprockets and related components; chains can be sourced through your preferred chain supplier, or we can discuss combined sourcing if needed.

Q4: What lead time should we expect?
Prototype sprockets are typically available within 2–3 weeks after drawing confirmation and tooling readiness. Series lead time depends on quantity and process route and will be confirmed in our quotation.

Q5: What is your typical MOQ?
MOQ depends on size, complexity, and tooling cost. We support flexible MOQ for development and pilot batches, then align batch sizes with your production schedule.