IN-HOUSE R AND LAB -
WHERE RELIABILITY TAKES SHAPE

A strong technical team and professional testing instruments

ensure rigorous quality control at every stage.

TURNTABLE AND CROSSED
ROLLER BEARINGS

Long-life precision engineered for sustained excellence.

PRECISION BEARING EXCELLENCE
- FORGED BY EXPERIENCE AND DEDICATION

We deliver high-quality precision bearings through integrated
design, R, production, and sales expertise.

After-sales service
Pre-sales
service
Timeliness Commitment
In-process service
Who we are

Manufacturing premium bearings, building a first-class brand

Jiangsu Dena Precision Bearings Co., Ltd., established in 2008, was formerly known as Changzhou Yaoguang Bearings Co., Ltd., which was founded in 1996. The company occupies a total area of over 14,000 square metres and currently employs more than 200 staff, including a technical team of 30. It has established a first-class laboratory in China and is a modern manufacturing enterprise specialising in the design, research and development, manufacture and sale of precision bearings. The company possesses state-of-the-art production equipment and specialised testing instruments, with products manufactured and quality-controlled in strict accordance with the IATF 16949 quality management system.

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30+
Years of Experience
What We Offer
Our products

CSD series

Robot reducers have the characteristics of high precision, high rigidity, high load, high speed ratio, high lifespan, low inertia, low vibration, low noise, low temperature rise, compact structure, and simple installation. Currently, there are two main types of reducers used in the field of robot reducers: harmonic reducers and RV reducers.

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Double row cylindrical roller bearings

The rollers in cylindrical roller bearings are typically guided by two flanges on one bearing ring. The cage, rollers and guiding ring form an integral unit that can be separated by the other bearing ring; these are therefore classified as separable bearings. Such bearings are relatively easy to install and disassemble, and their advantages are particularly evident when interference fits are required between the inner and outer rings and the shaft or housing
These bearings are generally used only to support purely radial loads; only single-row bearings with flanges on both the inner and outer rings can withstand small fixed axial loads or large free axial loads.
Compared with deep-groove ball bearings of the same external dimensions, these bearings have a higher radial load capacity. However, they place higher demands on the machining accuracy of related components, such as the shafts and housing bores, that mate with them.

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Double row crossed cylindrical roller bearings

In a crossroller ring, cylindrical rollers are arranged perpendicularly to one another by spacers on 90degree Vgroove raceways. This design enables a single bearing to withstand loads in all directions, including radial loads, axial loads and moment loads.

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14,000m²
Company From All Around The World trust on Dustrium for awesome project

We develop creative, comprehensive, and sustainable engineering solutions for

a future where society can thrive.

Year of Establishment
2000
assembly line
0 +
Number of employees
1990 +
Why Choose Us

Powerful Manufacturing, Trusted Quality, Expert Engineering Support

Mass production capacity

With over 200 employees, a 14,000㎡ manufacturing facility and a mature IATF16949-compliant production system, we possess strong batch production capabilities. Our efficient production lines and professional testing instruments ensure timely delivery of high-quality precision bearings for large-volume orders.

Good product consistency

Backed by the IATF16949 quality management system and first-class laboratory facilities, we ensure exceptional product consistency through stringent process control. Our sophisticated production equipment and professional testing instruments guarantee that every bearing delivers stable, reliable performance across all batches.

The product range covers a wide variety of sizes

Our product portfolio spans a wide dimensional range, from miniature bearings for precision instruments to large-scale turntable bearings for heavy-duty equipment. This broad coverage enables us to meet diverse customer specifications across CNC machine tools, industrial robots, aerospace and automotive gearboxes with flexible, tailored solutions.

Extensive industry experience

Evolving from a 1998-founded predecessor to today's Dena Precision Bearing, we bring over 25 years of deep expertise in high-precision bearings. Our technical team of 30 masters turntable, crossed roller, robot reducer, angular contact, deep groove and cylindrical roller bearings, achieving P2-P4 accuracy grades for aerospace, robotics and CNC applications.

Blog & News

Our Latest Article

Testimonials

What they say about us

A manufacturer of CNC rotary tables approached our company through a customer referral. Following a site visit, they were highly satisfied with our production scale and technical testing capabilities, and placed a single order for 10,000 sets of rotary table bearings. Feedback on the installation was excellent, with the customer commenting: ‘We’ll be coming to you for all our future bearing purchases! The quality is excellent, the prices are competitive, and the value for money is outstanding.’
Word-of-mouth recommendations, <br>bulk purchasing
Word-of-mouth recommendations,
bulk purchasing
A client in the machinery sector urgently required bearings for emergency repairs to their equipment, requesting same-day dispatch and delivery by Saturday. Our company immediately coordinated with the heat treatment, production and logistics teams to ensure the goods were delivered on time. The client reported that the product quality was excellent and subsequently placed repeat orders as well as orders for other products.
Urgent Delivery, Building Trust
Urgent Delivery, Building Trust
A leading manufacturer of high-end hydraulic motors had previously relied on imported components, such as pistons and nine-hole discs, for many years, which resulted in high costs and long lead times. Having decided to give our company a try, and following numerous discussions and sample tests with our technical team, the client ultimately placed a bulk order for our hydraulic motor products. The client commented: “Your products offer excellent value for money and consistent quality, which has enabled us to capture domestic and international markets more swiftly.”
Replacing imports, <br>reducing costs and improving efficiency
Replacing imports,
reducing costs and improving efficiency
Common Questions

Most Popular Questions.

Have Any Questions?

Everything You want to Know About Our Services

Contact Us
What should I do if there is a quality issue with the product?
Should you discover any quality issues with our products, please contact our after-sales service department without delay. We strictly adhere to the ‘Three Guarantees’ policy on product quality—guaranteeing returns, replacements and repairs—until the customer is satisfied. Our service staff will not leave the site until the issue has been resolved and the customer is satisfied.
What is the normal service life of a bearing?
The service life of bearings is influenced by a variety of factors, including load, rotational speed, lubrication, installation accuracy and operating environment; it is therefore not possible to specify a standard service life. Provided they are correctly installed and properly maintained, our products offer a service life that is no less than that of comparable products. We recommend regular inspections and appropriate lubrication to effectively extend the service life of the bearings.
What should be done if a bearing overheats or makes unusual noises during use?
It is recommended to first investigate the following common causes: ① Overheating — usually caused by overfilling with grease (it is recommended that the grease should not exceed 60% of the internal bearing space) or grease degradation; replace with a suitable grease and adjust the fill level; ② Abnormal noise — this may be caused by misalignment during installation or contaminants in the rolling elements; the bearing must be realigned or the contaminants removed; ③ Surface spalling — this is usually caused by insufficient lubrication or overloading; the lubrication system must be checked and the load adjusted; in severe cases, the bearing must be replaced.
What precautions should be taken when fitting bearings?
Key points to note: Installation of high-precision bearings: ① Installation must be carried out in a dry, clean environment; ② Tighten the mounting bolts in a criss-cross pattern in three stages to prevent bearing deformation, which could lead to excessive difficulty in rotation; ③ Do not strike the inner or outer ring of the bearing directly with a hammer; use a sleeve to assist with installation to avoid damaging the flanges and rolling elements; ④ The assembly must not be disassembled; ⑤ Ensure coaxiality between the shaft and the bearing housing to prevent overheating and seizure during operation; ⑥ Lubricating oil may be applied to the mounting surfaces to facilitate smoother installation.
Does your company offer customisation services for non-standard bearings? How long does the customisation process take?
We offer customisation services for non-standard bearings. Please provide detailed customisation specifications (dimensions, materials, precision, sealing requirements, etc.), and our technical team will assess feasibility and inform you of the exact lead time. The specific lead time varies depending on the complexity of the product and the customisation batch size.
What information do I need to provide when placing an order to ensure the correct model is selected?
We recommend providing the following three categories of key information: ① the specific bearing model (if no model number is available, please provide the inner diameter, outer diameter and width); ② material and precision grade requirements (e.g. P0 standard grade, P2 precision grade, etc.); ③ application (e.g. high-precision CNC rotary tables, electric motors, industrial robots, machine tools, construction machinery, etc.) and operating conditions (load type, rotational speed, ambient temperature). This will enable us to select the most suitable bearing.
How can we purchase bearings from your company? What channels are available?
Purchases can be made through the following official channels: (1) Contact one of our sales managers; (2) Use the online enquiry form on our official website; (3) Call our customer service helpline; (4) Email us. We recommend purchasing through official channels to ensure you receive genuine products.
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Sales Department
After-sales customer service
  • sales@deu-bearing.com
  • No. 5 Xianzhuang Road, Chengchang Industrial Park, Huangtu Town, Jiangyin City, Jiangsu Province