Your Trust Brass Ball Cages Manufacturer

Gunri is a leading Chinese manufacturer and exporter of industrial brass ball cages, ideal for tool and die making.
We offer a comprehensive range of ball bearing components, cages, and retainers specifically designed for precision engineering, catering to the metal stamping industry.

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Standard Brass Ball Cage Bearings

  • brass ball cage manufacturer
  • brass ball cage standard size
  • brass Ball Cage Technical
  • Brass ball cage price
  • Ball Cage Material
  • brass die parts ball bearing cage bushing

The Advantages of Partnering with GUNRI

When you choose us as your brass ball cage supplier, you are choosing a partner committed to quality, precision, and customer satisfaction. Here’s why our clients trust us to deliver superior solutions:
1. Industry Expertise
With years of experience in manufacturing ball retainers, we understand the intricacies of creating high-performance products. Our team of engineers and technicians possesses extensive knowledge of ball bearing technology and brass’s material properties, ensuring that our products meet the evolving needs of our clients.
2. Tailored Solutions
We recognize that every project is different. Whether you require custom specifications or off-the-shelf solutions, we are equipped to deliver. Our collaborative approach allows us to work closely with clients, offering tailored advice and solutions that perfectly align with their applications.
3. On-Time Delivery
Time is of the essence in any industry, and we take pride in our ability to meet tight deadlines. Our streamlined manufacturing processes ensure that we deliver brass ball cages on time without compromising on quality. We maintain a strong supply chain to ensure that materials are readily available, reducing lead times for our customers.
4. Competitive Pricing
Our competitive pricing strategy allows us to offer high-quality brass ball retainers at cost-effective rates. We strive to provide value for money while maintaining superior product quality, ensuring that our clients receive the best possible return on their investment.

Brass Ball Cage Standard Size Overview

Brass ball cages are typically manufactured in a range of sizes to accommodate various guide bushing diameters and post lengths. The dimensions generally considered include the outer diameter (OD), inner diameter (ID), thickness, and the number and size of ball bearings the cage is designed to hold. Below is an overview of standard sizes commonly used in the industry:
Outer Diameter (OD)
The outer diameter of the brass ball cage is one of the most critical dimensions as it determines compatibility with the guidepost. Standard outer diameters range from 20mm to 100mm, with the most common being 30mm, 40mm, and 50mm depending on the size of the guidepost and bushing it is paired with.
Inner Diameter (ID)
The inner diameter must fit snugly around the guidepost. This ensures proper movement and performance. Standard inner diameters typically fall between 10mm and 90mm, with the actual size depending on the specific application requirements.
Thickness and Height
Thickness or height of the brass ball cage is important for ensuring the structural integrity of the component. Standard thicknesses typically range from 5mm to 20mm, with 8mm to 12mm being the most common for medium-sized molds.
Number of Balls
The number of steel balls held within the brass cage is determined by the size of the cage itself. Larger cages will naturally hold more balls, improving the load-bearing capacity and stability of the assembly. Typical brass ball cages hold between 10 to 50 steel balls, with the exact number determined by both the size of the cage and the size of the balls themselves.
Ball Diameter
Ball diameter is an important factor in determining the friction and smoothness of movement within the mold assembly. Common ball diameters used in brass ball cages range from 1.5mm to 5mm, with 2mm and 3mm being the most widely used for standard die and mold applications.

Common ball distribution patterns:

  • Single row: Balls are arranged in a single row, commonly used in smaller guide posts and bushings. This method is simple in structure and low in cost, but has relatively weak load-bearing capacity.
  • Double row: Balls are arranged in two rows, increasing the number of balls, improving load-bearing capacity and guiding accuracy.
  • Multiple rows: Balls are arranged in multiple rows, further improving load-bearing capacity and guiding accuracy, suitable for large molds and high-precision applications.
  • Helical: Balls are arranged in a helical pattern, which can evenly distribute the load, improving guiding accuracy and wear resistance.
  • Special distribution: According to specific mold requirements, other special ball distribution patterns can be adopted, such as asymmetric distribution and local dense distribution.”

Explanation of some technical terms:

  • Ball distribution pattern: This refers to the arrangement of balls within a ball bushing or retainer.
  • Guide post: A cylindrical component that guides the movement of a punch or die in a mold.
  • Bushing: A metal lining inserted into a hole to reduce wear and provide a smooth surface for a moving part.
  • Load-bearing capacity: The maximum load that a component can withstand without failure.
  • Guiding accuracy: The precision with which a component can guide the movement of another component.


The price of brass ball cages can vary depending on factors such as:
Size: Larger or more complex cages generally cost more.
Quantity: Bulk orders typically lower the per-unit price.
Customization: Specially designed cages tailored to specific needs may increase the cost.
Supplier and Location: Prices can fluctuate based on regional production costs, shipping fees, and supplier pricing structures.
As a general estimate, the price of brass ball cages can range from $5 to $50 per piece, depending on the specifications. For precise pricing, it’s advisable to request a quote from manufacturers or suppliers, especially for large or custom orders.

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Materials and Benefits of Brass in Ball Cages
The use of brass as the primary material for ball cages offers several advantages over other materials like plastic or steel:
Corrosion Resistance: Brass offers superior resistance to corrosion, especially in environments exposed to humidity and chemicals.
Durability: Brass is tough and able to withstand the wear and tear of high-stress environments, ensuring longevity and reducing the need for frequent replacements.
Self-Lubrication: One of the key reasons for choosing brass is its self-lubricating properties, which reduce the need for additional lubrication during operation.
Precision Fit: Brass can be machined to very tight tolerances, ensuring a precise fit that is essential for high-performance molds.

Customizability and Flexibility of Brass Die Parts

One of the key reasons manufacturers prefer brass for their die parts is its customizability. Brass can be machined to meet specific tolerances, ensuring that parts fit perfectly into the machinery they are designed for. Whether it’s a complex mold for the plastic injection industry or a high-precision bushing for the automotive sector, brass offers the flexibility and performance that industrial applications require.Precision Machining: Brass can be machined to exact specifications, ensuring that it meets the demanding needs of high-precision industries.Complex Shapes: Brass die parts can be manufactured into complex shapes and sizes, providing flexibility for unique machinery and tools.Sustainability: Brass is recyclable, making it an environmentally friendly option for industries looking to reduce their carbon footprint.
In industries that demand precision, durability, and efficiency, brass die parts and ball bearing cage bushings provide an unbeatable combination of strength and reliability. From automotive to aerospace and industrial machinery, these components are foundational to the smooth operation and longevity of your equipment. By choosing high-quality brass components, manufacturers can reduce downtime, improve efficiency, and ensure that their machinery operates at its full potential for years to come.

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ball bearing cage types

The variety of Brass Ball Cage assemblies is primarily due to the diverse requirements of each project. From the manufacturer’s perspective, they can be categorized based on regional standards such as Japanese Standards (JIS), German Standards (DIN), and American Standards (AISI).

  • JIS ball cage
  • DIN ball cage
  • AISI ball cage
  • Mini ball cage

misumi-standard BALL CAGE

Ball cages can be categorized based on their application: mold-based and ejection plate-based.

ball cage for mold-based

ball cage for stripper plain/ ejection plate-based

fibro-standard BALL CAGE

In Germany, fibro-standard ball bushings with both needle and ball configurations are well-known, with needle-type bushings being particularly suitable for more precise equipment.

fibro-standard ball cage
Precision needle ball cage

mahr-standard BALL CAGE

In the US, Dayton Lamina and Danly are big names when it comes to high-quality ball bushings.

DANLY-standard ball cage

A distinctive U-shaped ball arrangement characterizes the exterior of DANLY ball cage bushing.

Part No.DescriptionC – Length (in)D – I.D. (in)S (in)
6-0806-821CAGE 1.00IDX 1.500 OAL-TYPE I1.510.4375
6-0808-821CAGE 1.00IDX 2.000 OAL-TYPE I210.6875
6-0808-822CAGE 1.00IDX 2.000 OAL-TYPE II210.6875
6-0810-822CAGE 1.00IDX 2.500 OAL-TYPE II2.510.875
……………
6-1019-822CAGE 1.25IDX 4.750 OAL-TYPE II4.751.251.5
6-1208-821CAGE 1.50IDX 2.000 OAL-TYPE I21.50.6875
……………
6-1427-822CAGE 1.75IDX 6.750 OAL-TYPE II6.751.752.8125
6-1612-821CAGE 2.00IDX 3.000 OAL-TYPE I321.1875
……………
6-2035-822CAGE 2.50IDX 8.750 OAL-TYPE II8.752.55.125
6-2416-821CAGE 3.00IDX 4.000 OAL-TYPE I431.3125
……………
6-2435-822CAGE 3.00IDX 8.750 OAL-TYPE II8.7535.125

Mini ball cages, due to their compact size and high precision, find applications in sophisticated equipment like chip manufacturing.

MAHR-standard ball cage.pdf

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brass Ball Cage Application


Automotive Industry: CV joints, transmissions, and more.
Machinery Industry: Bearings, transmission systems, and other mechanical components.
Electronics Industry: Micro motors, precision instruments, and related applications.
Other Industries: Aerospace, medical devices, and various industrial equipment.
Advantages of Brass Ball Cages:
Excellent wear resistance: Brass ball cages exhibit exceptional resistance to wear and abrasion.
Corrosion resistance: They are highly resistant to corrosion, making them suitable for demanding environments.
High-temperature resistance: Brass ball cages can withstand high temperatures without significant degradation.
Precision and accuracy: They provide precise and accurate performance, ensuring smooth operation.
Low noise: Brass ball cages operate quietly, reducing noise levels in applications.
Long service life: Due to their durability and resistance to wear, brass ball cages offer extended service life.

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custom brass Ball Cage

Brass ball cage manufacturer


With two decades of expertise, GUNRI has established itself as a trusted OEM partner for brass ball cages. Our extensive capabilities allow us to produce custom components to various standards, using a wide range of materials. Whether you require German, American, Japanese, or non-standard designs, GUNRI delivers premium quality products.

  • 20 Years of Experience

  • A team of 200 people

  • 6,000 square meters of space

  • ISO9001: 2008

  • Custom OEM Factory

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