Deep Groove Ball Bearings Set 6 Sizes 12pcs-10pcs Dianrui

Description

Product Overview

The Dianrui deep‑groove ball bearing collection is engineered for precision, durability, and ease of use across a broad spectrum of small‑scale mechanical applications. Each package contains six distinct bearing sizes—693ZZ (3 mm × 8 mm × 4 mm), 623ZZ (3 mm × 10 mm × 4 mm), 624ZZ (4 mm × 13 mm × 5 mm), 685ZZ (5 mm × 11 mm × 5 mm), 687ZZ (7 mm × 14 mm × 5 mm), and 627ZZ (7 mm × 22 mm × 7 mm)—providing a versatile toolkit for engineers, hobbyists, and repair professionals. The bearings are fabricated from high carbon steel, a material chosen for its ability to sustain high rotational speeds while minimizing noise and heat buildup. A thin layer of lubricating oil is applied during manufacturing, ensuring smooth, low‑friction operation from the first use and extending service life.

All bearings are securely stored in a sturdy, reusable plastic box that keeps the components organized and protected from dust, moisture, and accidental damage. The box’s transparent lid allows quick visual identification of each bearing size, reducing the time spent searching for the correct part during assembly or maintenance. Detailed specifications, including inner diameter, outer diameter, and width, are printed on the interior of the container for easy reference.

The design adheres to industry standards for deep‑groove ball bearings, guaranteeing compatibility with a wide range of shafts, housings, and mounting configurations. Whether you are building a custom electric toy, repairing a set of furniture casters, or upgrading the wheels on a skateboard, these bearings provide reliable performance and consistent tolerance levels that meet the expectations of demanding applications.

Usage

These bearings excel in environments where compact size, high speed, and low noise are essential. In electric toys such as remote‑controlled cars, drones, and motorized figurines, the 3 mm to 7 mm inner diameters accommodate miniature shafts while delivering smooth rotation that enhances the user experience. For furniture wheels, the 4 mm to 7 mm width bearings support the weight of chairs, tables, and cabinets, allowing effortless movement across carpeted or hardwood floors.

Skateboard and inline skate enthusiasts benefit from the 5 mm and 7 mm bearing options, which fit standard axle dimensions and provide a stable, low‑vibration ride. The pre‑lubricated surfaces reduce the need for frequent maintenance, making them ideal for outdoor use where exposure to dust and moisture is common. Additionally, the bearings are suitable for small‑scale industrial equipment, such as conveyor rollers, miniature gearboxes, and prototype machinery, where precise alignment and consistent performance are critical.

Installation is straightforward: simply insert the bearing into the housing, align the shaft, and secure with the appropriate retaining clip or locknut. The high carbon steel construction tolerates occasional overloads, while the sealed design prevents contaminants from entering the bearing interior. Users can rely on the set for both new builds and retrofits, confident that the bearings will integrate seamlessly with existing components.

Why Choose Us

Dianrui’s commitment to quality begins with material selection. High carbon steel offers superior hardness and wear resistance compared to standard bearing steel, ensuring that each unit maintains its dimensional stability even after prolonged operation at elevated temperatures. The manufacturing process incorporates precision grinding and polishing, resulting in a smooth race surface that minimizes friction and extends the bearing’s lifespan.

Every bearing undergoes rigorous testing for load capacity, speed rating, and noise emission. Our quality assurance team verifies that each batch meets the ISO 492 standard for deep‑groove ball bearings, providing confidence that the product will perform reliably in demanding applications. The pre‑lubrication is applied using a controlled oil‑film technique, delivering a consistent coating that reduces the risk of uneven wear.

Customer support is a cornerstone of the Dianrui experience. Our technical assistance team is available to help with selection, installation guidance, and troubleshooting. Should any bearing fail to meet expectations, we offer a straightforward replacement policy and a warranty that underscores our confidence in the product’s durability. By choosing Dianrui, you gain access to a trusted brand that prioritizes performance, reliability, and after‑sales service.

Key Features

• Six versatile sizes in one compact box, covering a wide range of small‑machine needs.
• High carbon steel construction provides excellent strength, heat resistance, and long‑term durability.
• Pre‑lubricated for immediate smooth operation, reducing maintenance time and cost.
• Sealed design protects against dust, moisture, and contaminants for reliable performance.
• Dedicated customer support and warranty ensure peace of mind and quick assistance.

FAQ

What is the difference between the 623ZZ and 624ZZ bearings?

The 623ZZ bearing has a 3 mm inner diameter, 10 mm outer diameter, and 4 mm width, while the 624ZZ is slightly larger with a 4 mm inner diameter, 13 mm outer diameter, and 5 mm width. Choose the 623ZZ for tighter shaft fits and the 624ZZ when a larger load capacity is required.

Are these bearings suitable for high‑speed motor applications?

Yes. The high carbon steel material and precision grinding allow the bearings to operate at high rotational speeds with minimal noise and heat generation, making them ideal for motor‑driven toys and small industrial equipment.

How do I install the bearings correctly?

Insert the bearing into the housing, align the shaft with the inner race, and secure it with a retaining clip or locknut. Ensure the shaft is clean and free of burrs before installation to avoid premature wear.

Can I replace the pre‑lubrication with my own grease?

While the factory‑applied oil provides adequate lubrication for most applications, you may re‑apply a compatible grease if your project requires a specific type of lubricant. Clean the bearing gently before adding new grease to maintain optimal performance.