Tianjin Ounaida Transmissions Technology Co., Ltd.

Tianjin Ounaida Transmissions Technology Co., Ltd. Our factory mainly produce gear, gear rack, sprocket, roller chain, timing pulley and timing belts, both standard and OEM.

https://www.tjond.com/news-detailsWe are exhibiting   2026 in São Paulo from May 5th to 9th.Booth number:  M033.Welcome ...
06/05/2026

https://www.tjond.com/news-details
We are exhibiting 2026 in São Paulo from May 5th to 9th.
Booth number: M033.
Welcome to visit our booth!

Ounaida Transmission Expands into South America: Tianjin Ounaida Technology to Debut at FEIMEC 2026 in Brazil TIANJIN, April 29, 2026 – Tianjin Ounaida Transmission Technology Co., Ltd. (hereinafter referred to as "Ounaida" or "TJOND"), a globally recognized manufacturer of precision transmission ...

https://youtu.be/JpGSbIWAYywThis is a video mainly introduce Tianjin OuNaiDa Transmissions Technology Co., Ltd. As an 20...
06/05/2026

https://youtu.be/JpGSbIWAYyw

This is a video mainly introduce Tianjin OuNaiDa Transmissions Technology Co., Ltd. As an 20+ years' manufacturer of high quality transmission conveyor roller chains, our factory is strictly adhere to ISO9001:2015 and CE certificate standard. We are committed to producing high-performance, long-life, and high-quality chains. Excellence begins with materials. We select high-strength steel such as 20Mn, 40Cr, 40Mn, and 35K. Our heat treatment is strictly controlled with a 60KG limit per load to ensure consistent hardness and durability. Through automated clearance adjustment and centerless grinding, we ensure superior dimensional precision. All components and rollers undergo an additional shot peening process to significantly enhance tensile strength and fatigue resistance. production lines feature vision inspection systems to automatically detect defects, cracks, or missing parts. For slim pins, we use high-precision four-side riveting to ensure optimal press-fit performance. automated pre-loading and tensile testing to minimize length tolerance. We apply premium white grease to maximize wear resistance.Note: The grease may stiffen in cold temperatures, which is a characteristic of high-quality protective lubricants and does not affect the chain's performance. Precision engineering, proven reliability. Choose our chains to power your machinery with confidence.
Website: www.tjond.com
Email: [email protected]

Main Products:Gear,Gear Rack,Sprocket,Roller Chain,Timing Pulley. Excellence, service first. VTB account payment accepted.

https://youtu.be/TEpnzNEfckY?si=QQ42o3luS7gTnYWrIn high-precision linear transmission systems, the installation quality ...
05/03/2026

https://youtu.be/TEpnzNEfckY?si=QQ42o3luS7gTnYWr

In high-precision linear transmission systems, the installation quality of the rack directly determines the positioning accuracy and service life of the entire machine. Even with high-precision ground racks, improper assembly sequence can lead to transmission noise or positioning errors. This video provides an in-depth analysis of the standard rack installation process, strictly following mainstream international assembly standards.
https://www.tjond.com

Main Products:Gear,Gear Rack,Sprocket,Roller Chain,Timing Pulley. Excellence, service first. VTB account payment accepted.

https://youtu.be/guZ2qcRGrJsKDI/OuNaiDa: 20+ Years of Excellence in Mechanical TransmissionPrecision in Motion, Integrat...
08/01/2026

https://youtu.be/guZ2qcRGrJs
KDI/OuNaiDa: 20+ Years of Excellence in Mechanical Transmission
Precision in Motion, Integrated for Performance
With over 20 years of manufacturing experience, KDI/OuNaiDa stands as a premier leader in the mechanical transmission industry. We are a comprehensive high-tech enterprise integrating R&D, production, sales, and full-cycle service, dedicated to providing world-class motion control solutions for global industrial automation.

State-of-the-Art Manufacturing & Metrology
We believe that precision is the foundation of performance. To ensure the highest standards of durability and accuracy, our facility is equipped with a suite of industry-leading machinery:
Precision Grinding: High-performance Gear Grinding Machines and Geat Rack Grinding Machines that deliver superior tooth surface finish and kinematic accuracy.
Surface Perfection: Advanced Surface Grinders to ensure optimal flatness and structural integrity.
Advanced Metrology: Our Hexagon/Zeiss Three-Coordinate Measuring Machines (CMM) provide rigorous dimensional verification, ensuring every component meets micron-level tolerances.

Annual Verification: Every test instrument is verified yearly by certified third-party laboratories.

Certified Quality, Global Trust
Quality is not just a slogan; it is our core identity. Our commitment to excellence is backed by internationally recognized certifications, providing our partners with peace of mind and market-ready compliance:

ISO 9001:2015: Certified Quality Management System.

CE: Compliance with European safety and performance standards.

RoHS: Adherence to environmental protection and hazardous substance restrictions.

Our Core Value: Kinetic Drive Integration

The name KDI represents our mission: to provide Kinetic Drive Integration. We don't just manufacture parts; we integrate 20 years of engineering wisdom into every component. Whether it is for high-end CNC machinery, robotics, or medical equipment, our products are engineered to optimize efficiency and extend the lifecycle of your systems.

Why Partner with us?
Expertise: Two decades of specialized experience in mechanical transmission.
Innovation: In-house R&D team focused on high-precision and low-noise technology.
Reliability: Strict QC protocols supported by advanced testing equipment.
Global Reach: Providing integrated solutions for clients across diverse international industries.
KDI /OuNaiDa— Precision in Motion, Integrated for Performance.

www.tjond.com

Main Products:Gear,Gear Rack,Sprocket,Roller Chain,Timing Pulley. Excellence, service first. VTB account payment accepted.

Technical Guide: Hardness Matching Principle for Gear and Gear Rack SystemsHardness Matching PrincipleTo maximize system...
05/01/2026

Technical Guide: Hardness Matching Principle for Gear and Gear Rack Systems

Hardness Matching Principle

To maximize system service life, the hardness of the pinion gear (small gear) should be 3–5 HRC higher than the hardness of the gear rack. This strategy ensures that wear is concentrated on the pinion gear—which is easier and cheaper to replace—rather than on the expensive and long gear rack.

The Real Wear Mechanisms of Gear and Gear Rack

In a gear-rack drive system, the primary wear factors include:
Adhesive Wear (Most common)
Fatigue Pitting
Fretting Wear
Plastic Deformation (Occurs at low hardness)

In practice, Adhesive Wear + Fatigue Pitting are the dominant factors.

Critical Analysis: Which Component is "Sacrificial"?

Case 1: Equal Hardness (No Hardness Gap)
Contact Stress: Both components bear similar stress.
Failure: Fatigue occurs simultaneously on both parts.
Result: Gear rack wear leads to high replacement costs and significant downtime.

Case 2: Pinion gear is Harder (+3–5 HRC) — Recommended
In the Contact Zone: The gear rack undergoes micro-plastic deformation while the pinion maintains elastic contact.
Result: Wear is prioritized on the small pinion gear, keeping the gear rack's tooth surface intact.

Case 3: Gear rack is Harder

Rack: Becomes more brittle; once fatigue occurs, it leads to irreversible pitting, spalling, and micro-cracking.

Pinion: Suffers from "cutting wear" caused by the harder gear rack, generating metal powder that further accelerates system degradation.

Why 3–5 HRC? (The Engineering "Sweet Spot")
0–2 HRC Distributed wear; unpredictable system life.
3–5 HRC Controllable wear; longest overall system life.
8–10+ HRC Increased meshing impact; prone to premature pitting.

To get more, welcome to contact us.
https://www.tjond.com

Specialized in manufacturing various kinds of standard and non-standard power transmission components. Our factory owns ...
29/12/2025

Specialized in manufacturing various kinds of standard and non-standard power transmission components. Our factory owns advanced production equipments, first class technology and professional engineers. We can also produce products according to customers' drawings or requirements.
Our Main Product:
1. Gear and Rack
2. Ball Screw and Nut
3. Linear Guide and Block
4. Sprocket and Roller Chain
5. Timing Pulley and Timing Belt
Tianjin OuNaiDa Transmissions Machinery Co., Ltd. was established in 2008 and is headquartered in Tianjin—a key industrial hub in northern China. As a leading manufacturer and global exporter specializing in the design and production of precision transmission systems, we integrate cutting-edge technology with decades of mechanical engineering expertise to deliver innovative solutions and manufacture products for industries such as automotive manufacturing, industrial automation, new energy, and robotics.

Our company is equipped with advanced production facilities, including CNC hobbing machines, CNC lathe, CNC machining centers, CNC punch press, CNC gear grinding machines, CNC rack grinding machines, CNC rack milling machines, surface grinder, hardness tester, CNC Three-coordinates measuring machine, Heat treatment equipment, rack chamfering machine, gear chamfering machine and so on. We strictly adhere to the ISO 9001 quality management system and international CE certification standards to ensure products meet customer requirements.

With flexible manufacturing capabilities as our core strength, we offer OEM/ODM services. Guided by the principle of "customer success first," we provide pre-sales technical consultation, 24/7 post-sales support, and multiple payment options.

Whether you require standard gear components or customized transmission systems, Tianjin OuNaiDa empowers your projects with precision engineering, innovative design, and reliable quality. Contact us to collaborate on shaping the future of industrial transmission technology!

www.tjond.com

Tianjin Ounaida is rooted in power transmission industry, we will always focus on quality and produce products according...
23/12/2025

Tianjin Ounaida is rooted in power transmission industry, we will always focus on quality and produce products according to CE and ISO9001:2015 certificate standard.
If any interests, welcome to contact us!
https://www.tjond.com

Main Products:Gear,Gear Rack,Sprocket,Roller Chain,Timing Pulley. Excellence, service first. VTB account payment accepted.

Выставка: Металлообработка 2025Дата: 26-29 мая 2025 г.Город: Москва, РоссияНомер стенда: 12B40Добро пожаловать на наш ст...
28/05/2025

Выставка: Металлообработка 2025
Дата: 26-29 мая 2025 г.
Город: Москва, Россия
Номер стенда: 12B40
Добро пожаловать на наш стенд.
[email protected]
+86 18522043971

Exhibition: Metalloobrabotka 2025
Date: 26th-29th, May, 2025
City: Moscow, Russia
Booth No.: 12B40
Welcome to our booth.
[email protected]
+86 18522043971

Address

No3-10-5 Beifangcheng, Miyun Road Naikai District
Tianjin
300112

Alerts

Be the first to know and let us send you an email when Tianjin Ounaida Transmissions Technology Co., Ltd. posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Share

Category