CHANG YI GEAR (CYG) is a custom gear manufacturer in Taichung, Taiwan, providing precision gears and transmission components for industrial machinery, automation equipment, OEM projects, replacement parts, and custom mechanical applications.

Our manufacturing capabilities cover spur gears, helical gears, precision ground gears, gear shafts, timing pulleys, sprockets, and other custom transmission components.

From prototype and small-batch production to volume manufacturing, CYG supports customers based on drawings, technical specifications, and actual application requirements.

Custom Spur & Helical Gear Manufacturing

CYG manufactures custom spur gears and helical gears according to customer drawings and specifications.

Our gear manufacturing range includes:

• Module: M0.5–M8
• Diametral Pitch: DP72–DP4
• Precision hobbing: JIS 3–JIS 6
• Gear grinding: JIS 3–JIS 0
• Custom dimensions and tooth configurations
• Prototype, small-batch, and production quantities

For applications requiring higher gear accuracy and surface quality, precision gear grinding can be included after heat treatment according to the required manufacturing process.

Precision Ground Gears

For customers requiring improved gear accuracy, tooth profile, lead, and surface quality, CYG provides precision gear grinding services.

Our ground gear capability includes:

• Gear accuracy up to JIS 0
• Ground gear surface roughness down to Ra ≤ 0.4 μm
• Spur and helical gear grinding
• Gear inspection based on agreed technical requirements

Precision ground gears are suitable for applications where stable meshing, controlled accuracy, and reliable transmission performance are important.

Heat Treatment Options for Custom Gears

Different gear applications require different material and heat-treatment combinations.

Depending on the drawing and technical requirements, CYG can support:

• Induction hardening
• Carburizing
• Vacuum heat treatment
• Nitriding

The appropriate process is evaluated according to the material, gear design, required hardness, dimensional requirements, and application conditions.

Surface Finishing Options

CYG also supports a range of surface finishing processes for gears and transmission components, including:

• Black oxide
• Anodizing
• Hard anodizing
• Electroless nickel plating
• Zinc plating
• Phosphate coating
• Nitriding

Surface treatment selection depends on the material, corrosion resistance, appearance, wear requirements, and customer specifications.

Gear Inspection & Quality Verification

For OEM buyers evaluating a new gear supplier, manufacturing capability alone is not enough. Product quality should be supported by actual inspection data.

CYG performs gear inspection using a LIEBHERR 280 gear inspection machine.

Depending on product requirements and agreed specifications, inspection items may include:

• Key dimensions
• Tooth profile
• Lead
• Pitch
• Radial runout
• Gear accuracy

Inspection reports can be prepared according to project requirements, helping customers evaluate actual manufacturing quality based on measurement data.

Timing Pulleys

In addition to custom gears, CYG manufactures timing pulleys in a wide range of profiles.

Available profiles include:

Inch Profiles

• MXL
• XL
• L
• H

Metric & Curvilinear Profiles

• T
• AT
• HTD
• STS
• RPP
• 2GT
• 3GT
• 5GT
• PowerGrip
• Poly Chain GT

Timing pulleys can be manufactured according to customer drawings, bore designs, hub configurations, materials, and surface finishing requirements.

Custom Sprockets

CYG also provides custom roller chain sprockets for industrial transmission applications.

Available configurations include:

• Single-row sprockets
• Double-row sprockets
• Combination sprockets
• RS15–RS80 pitches
• 06B–24B series

Custom bore, keyway, hub, material, and surface treatment requirements can be evaluated based on the drawing.

RF Conveyor Rollers & Special Transmission Components

CYG manufactures additional transmission components according to customer drawings and application requirements.

Our capabilities include custom tooth forms, milled tooth profiles, and RF conveyor roller configurations.

For special or non-standard components, customers are welcome to provide drawings, photos, samples, or available technical information for feasibility review.

Why OEM Buyers Work with CHANG YI GEAR

Low Volume, High Variety

CYG supports custom manufacturing for gears and transmission components with flexible production quantities.

Customers may begin with prototypes or small trial orders before moving into regular production.

Precision Gear Manufacturing

From hobbing to precision gear grinding, CYG can support different accuracy requirements according to the application.

Multiple Manufacturing Processes

Gear machining, heat treatment, surface finishing, and inspection can be coordinated according to the required manufacturing sequence.

Inspection Data Available

Dimensional and gear inspection records can be provided according to agreed project requirements.

Made in Taiwan

CHANG YI GEAR has been manufacturing gears and transmission components in Taichung, Taiwan since 2000.

Looking for a Custom Gear Manufacturer in Taiwan?

If you are looking for a supplier for custom gears, precision ground gears, gear shafts, timing pulleys, sprockets, or special transmission components, send us your technical information for review.

For faster evaluation, please provide:

• 2D / 3D drawings
• Material requirements
• Module or gear specifications
• Accuracy requirements
• Heat treatment requirements
• Surface finish
• Quantity
• Application or assembly information

If complete drawings are not available, you may also provide existing part photos, samples, and available dimensions for an initial feasibility review.

CHANG YI GEAR CO., LTD.
Custom Gears | Precision Ground Gears | Gear Shafts | Timing Pulleys | Sprockets
Taichung, Taiwan
Email: cygears@cygears.com

CHANG YI GEAR provides custom spur gears, helical gears, precision ground gears, timing pulleys, sprockets and transmission components in Taiwan.

The post CHANG YI GEAR – Custom Gear Manufacturing Capabilities first appeared on 彰一齒輪有限公司.

From surface condition evaluation to a more uniform and brighter final appearance

After heat treatment, the current batch of gear components showed more visible dark marks and surface color variation.

From the customer’s perspective, dimensional and functional requirements are important, but the consistency of the final appearance also affects the overall impression of product quality.

Instead of stopping at an explanation of the surface condition, CHANG YI GEAR (CYG) further evaluated whether a practical appearance-improvement solution could be applied.

Customer Challenge

After heat treatment, the surface of the current batch showed more noticeable dark areas, black marks, and local color variation.

Compared with the previous production batch, the difference in appearance was more obvious, and the customer expected a more stable and consistent final finish.

For CYG, manufacturing is not only about completing a component according to the drawing.

When the actual result differs from the customer’s expectation, we also review the condition and evaluate whether there is a suitable way to improve it.

CYG Assessment

CYG further reviewed and compared the surface condition of the parts and evaluated possible follow-up surface treatment options.

The objective of this case was not to change the original dimensions or functional requirements of the component.

The focus was to identify a practical method to improve the final appearance according to the customer’s expectations.

After evaluation, CYG selected one component for electroless nickel plating as an appearance-improvement solution.

Improvement Solution

After electroless nickel plating, the treated component showed a more uniform and brighter metallic appearance, with improved overall surface consistency.

The purpose of adding this treatment was specifically to improve the final visual appearance.

It was not intended to change the gear accuracy or the original functional requirements of the component.

The confirmed process flow for this case can be summarized as:

Machining
→ Heat Treatment
→ Surface Condition Review
→ Improvement Evaluation
→ Electroless Nickel Plating
→ Customer Confirmation

By comparing the parts from different stages, the difference in surface appearance before and after electroless nickel plating can be clearly observed.

Result & Customer Feedback

After the electroless nickel treatment was completed, CYG provided photos of the improved component to the customer for confirmation.

After reviewing the improved appearance, the customer responded positively:

“Very good.”

This feedback was based on the photos provided by CYG.

Therefore, it should be understood as positive confirmation of the improved appearance and not as final physical acceptance of the completed parts.

What This Case Demonstrates

The key point of this case is not simply that an additional surface treatment was applied.

More importantly, when a manufacturing result does not fully match the customer’s expectation, CYG takes the next step to review the condition, evaluate practical options, and present an improved result for customer confirmation.

For us, manufacturing is not only about producing parts according to drawings.

Communication, technical judgment, and practical problem solving are also important parts of a reliable manufacturing partnership.

CHANG YI GEAR — We Think Further for You.

Have a Similar Manufacturing Requirement?

If your custom gears, gear shafts, or precision transmission components have special requirements related to heat treatment, surface treatment, appearance consistency, or other manufacturing conditions, please send us the available technical information for feasibility review.

You may provide:

• 2D / 3D drawings
• Product photos
• Sample information
• Material requirements
• Quantity
• Accuracy or other technical requirements

CYG will review the actual product conditions and evaluate suitable manufacturing and processing options.

CHANG YI GEAR CO., LTD.
Custom Gears | Gear Shafts | Precision Transmission Components
Email: cygears@cygears.com

CYG Technical Case 002 – CHANG YI GEAR evaluated visible surface color variation after heat treatment and applied electroless nickel plating to improve the final appearance.

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When replacement parts are no longer available, the original drawings are missing, or standard gears cannot directly fit the existing assembly, replacing a worn gearbox component becomes more than a simple machining job.

In this project, the customer provided an existing set of gears and gear shafts for evaluation.

Rather than copying only one individual gear, CHANG YI GEAR (CYG) reviewed the complete set to understand the relationships between the gears, shafts, splines, and assembly interfaces before planning the remanufacturing process.

The Customer’s Challenge

The existing gearbox components had become worn, while the customer was also facing inconsistent supplier quality and a lack of original engineering drawings.

Standard replacement gears were not a direct fit.

This meant the project required more than simply reproducing one worn part. The complete set had to be reviewed to understand how the components worked together.

Engineering Assessment from Existing Parts

CYG re-measured the existing gears and shafts and evaluated the key assembly relationships.

The assessment included:

• Gear meshing relationships
• Shaft diameters and stepped sections
• Spline features
• Assembly fit
• Relevant dimensional requirements
• Manufacturing and inspection considerations

Evaluating the complete set helps reduce the risk of producing an individual component that meets its own dimensions but does not properly match the surrounding parts.

Rebuilding the Manufacturing Information

After the necessary technical data was reviewed, CYG began planning the complete gear and shaft set as a matched manufacturing project.

The objective is not simply to make a new part that looks similar to the original.

The manufacturing plan must consider the relationship between the gears, shafts, splines, and assembly positions so that the remanufactured components can be evaluated as a complete set.

Before production, the required material, dimensions, accuracy level, manufacturing process, and inspection requirements are confirmed according to the available technical information.

Quality You Can Verify

For OEM buyers evaluating a new gear supplier, price and lead time are important, but product quality should also be supported by actual inspection data.

Depending on the product and agreed specifications, CYG can prepare dimensional and gear inspection documentation.

Inspection items may include:

• Key dimensions
• Tooth profile
• Lead
• Pitch
• Radial runout
• Gear accuracy

Actual measurement records allow customers to evaluate product quality against defined technical requirements rather than relying only on verbal claims.

Looking for a Second Supplier? Start with a Trial Order

Changing or adding a new gear supplier does not necessarily mean transferring an entire production order immediately.

For suitable projects, customers may begin with a small trial order to evaluate actual parts, inspection results, communication, and manufacturing capability.

A trial quantity may start from approximately 5–20 pieces, depending on the drawing, manufacturing process, and technical requirements.

After trial production, the customer can review the actual components and inspection documentation before deciding whether to expand the cooperation.

No Complete Drawing? Start with What You Have

If complete engineering drawings are available, please provide:

• 2D or 3D drawings
• Material requirements
• Gear accuracy requirements
• Quantity
• Other technical specifications

If the original drawings are incomplete or unavailable, you may first provide:

• Photos of the existing parts
• Available dimensions
• Assembly information
• Sample components or related technical data

CYG can then evaluate whether further measurement, drawing reconstruction, or complete-set analysis is required.

Current Project Status

This remanufacturing project is currently in production.

Final inspection and customer verification are still pending.

At this stage, the case demonstrates CYG’s approach to rebuilding manufacturing information from existing components and planning the remanufacture of a complete gear and gear shaft set.

Need a Gear Set Remanufactured or a Second Source Supplier?

CHANG YI GEAR provides custom manufacturing services for gears, gear shafts, and precision transmission components.

Send us your drawings, photos, sample information, material, accuracy requirements, and estimated quantity for manufacturing feasibility review and quotation.

CHANG YI GEAR CO., LTD.
Custom Gears | Gear Shafts | Precision Transmission Components
Email: cygears@cygears.com

CYG Technical Case 001 – Engineering assessment and remanufacturing planning for a complete gear and gear shaft set based on existing components.

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The 2026 Taichung Automation Exhibition has successfully concluded.

We sincerely thank all our customers, partners, and industry professionals who visited the Chang Yi Gear booth. Your support and valuable conversations gave us a great opportunity to showcase our expertise in precision gear manufacturing, custom solutions, and quality assurance.

Although the exhibition has come to an end, our commitment to quality, precision, and customer satisfaction continues. Chang Yi Gear remains dedicated to delivering reliable custom gear solutions and building long-term partnerships with customers worldwide.

📅 Next Stop – TIMTOS 2027

We look forward to meeting you again at TIMTOS 2027, held from March 2–6, 2027, at Taipei Nangang Exhibition Center, Hall 1.

We sincerely invite you to visit the Chang Yi Gear booth and discover our latest precision gear and custom manufacturing solutions.

Thank you for your support. We look forward to seeing you again in Taipei!

The post 2026 Taichung Automation Exhibition Successfully Concluded Thank You for Visiting Chang Yi Gear first appeared on 彰一齒輪有限公司.

We specialize in custom gears, small-batch production, gear grinding, sprockets, timing pulleys, gear racks, gear shafts, couplings, and precision transmission components made in Taiwan.

Visitors are welcome to bring drawings, samples, or photos for on-site discussion. Our team will be happy to support your requirements for new product development, sample production, replacement parts, and customized transmission components.

Event: Taichung Industrial Automation Exhibition 2026
Date: July 2 – July 5, 2026
Venue: Taichung International Convention and Exhibition Center
Booth: 3002

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At the exhibition, Chang-Yi Gear showcased a variety of newly developed products and solutions designed to enhance production efficiency and manufacturing precision, receiving enthusiastic responses from attendees. Moving forward, we will continue to strengthen our technical expertise, expand into global markets, and work hand in hand with our partners to reach new milestones.

Once again, thank you for your support and participation. We look forward to seeing you at the next exhibition.

Chang-Yi Gear – MAKE YOU CHEER

The post 2025 TIMTOS Taipei International Machine Tool Show Successfully Concluded first appeared on 彰一齒輪有限公司.

Through this international interaction, both sides not only shared the latest industry trends and technical expertise but also strengthened cooperative ties, laying a solid foundation for mutual advancement in the gear industry.

Chang-Yi Gear is honored to have been part of this visit and will continue to leverage our professional expertise and innovative capabilities to drive industry development, working hand in hand with global partners toward greater milestones.

Chang-Yi Gear – MAKE YOU CHEER

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Chang-Yi Gear continues to invest in advanced equipment to meet high-precision demands. The MATRIX GHP-3540 CNC Gear Form Grinding Machine achieves DIN 6 grade or better (JIS Grade 2), ideal for robotics, automation, and machine tool industries.

With over 20 years of experience and a complete in-house process, we ensure every gear meets international standards, helping customers enhance efficiency and competitiveness.

Chang-Yi Gear – MAKE YOU CHEER

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