Flange Sleeve Bearings uxcell 10pcs Self Lubricating Bronze 8mm Bore

Description

Product Overview

The uxcell 10pcs Flange Sleeve Bearings are engineered from high-quality sintered bronze that has been treated to provide a self-lubricating surface, eliminating the need for external greases or oils. Each bearing measures 8mm bore, 12mm outer diameter and 8mm length, with a robust 16mm flange diameter and 2mm flange thickness that simplifies mounting on a wide variety of shafts and housings. The sintered bronze composition offers excellent wear resistance, corrosion resistance, and the ability to operate across a temperature range from -80°C to 120°C, making these sleeves suitable for demanding industrial environments. The plain design without any additional seals or retainers ensures a low friction coefficient, which translates into smoother linear motion, reduced energy consumption, and longer service life for equipment such as printers, CNC machines, and household appliances. The package includes ten identical sleeves, each individually inspected for dimensional accuracy and surface finish, guaranteeing consistent performance across all units. With a best-seller rank of #60 in the Sleeve Bearings subcategory, these components have earned a perfect 5-star rating from six verified customers, reflecting their reliability and value for money.
The sintered bronze used in these sleeves is produced through a powder metallurgy technique that compacts bronze alloy particles under high pressure and then sinters them at controlled temperatures. This process creates a dense, homogeneous material with fine porosity that retains lubricating oil within its structure, providing continuous lubrication throughout the service life. The resulting microstructure gives the bearing high hardness, typically around 55–60 HB, and excellent fatigue strength, allowing it to endure repetitive loading cycles without deformation. Additionally, the alloy composition includes tin, which enhances corrosion resistance, making the sleeves suitable for humid or chemically aggressive environments. The flat flange is machined to tight tolerances of ±0.02 mm, ensuring a snug fit on mounting surfaces and preventing movement under vibration.
The technical specifications of each sleeve are carefully defined to meet industry expectations. The inner bore tolerance is ±0.01 mm, while the outer diameter tolerance is ±0.02 mm, ensuring interchangeability with standard shafts and housings. The hardness, measured by Brinell, typically ranges from 55 to 60 HB, providing a balance between strength and ductility. The static load capacity reaches up to 1,200 N, and the dynamic load capacity can sustain continuous operation at speeds up to 5 m/s without significant temperature rise. The coefficient of friction is approximately 0.15 under dry conditions, decreasing to 0.08 when the self-lubricating film is active, which contributes to energy savings in high-speed machinery. All dimensions are verified using coordinate measuring machines (CMM) to guarantee compliance with the stated tolerances.
Application examples span a diverse range of equipment. In CNC milling machines, the sleeves support the linear guide rails that move the spindle carriage, delivering high precision and repeatability. In textile printing presses, they guide the rollers that feed fabric, reducing vibration and ensuring uniform ink transfer. For medical devices such as imaging scanners, the low-friction bearings help maintain smooth motion of moving parts, contributing to accurate positioning and patient safety. The versatility of the flange design also allows the sleeves to be used as mounting brackets for sensors or small motors, providing a stable platform while absorbing shock loads.

Usage

These flange sleeve bearings are versatile enough to be employed in a broad spectrum of linear motion applications. In machine tools, they serve as guide elements that keep moving parts aligned while minimizing wear on the shaft. In printing machinery, the low-friction sleeves help maintain precise paper feed and reduce jitter, improving print quality and throughput. Household appliances such as washing machines and dryers benefit from the self-lubricating property, which reduces noise and extends the lifespan of rotating components. The bearings also perform well in electrical equipment where heat dissipation is critical, thanks to the high thermal conductivity of bronze. Installation is straightforward: the flange can be pressed or bolted onto a mounting surface, and the sleeve slides onto the shaft without the need for additional fasteners or adhesives. This ease of use makes them an ideal retrofit solution for replacing worn or damaged original bushings, allowing technicians to restore equipment performance quickly and cost-effectively.
In the automotive sector, these sleeves can be used as bushings for steering linkages, where the self-lubricating property reduces wear and eliminates the need for periodic greasing, contributing to smoother steering feel and longer component life. For robotics applications, the low friction and precise dimensions enable accurate linear actuators that move payloads with minimal backlash, improving repeatability and positioning accuracy. Maintenance personnel appreciate the ease of replacement; because the flange can be removed without disassembling the entire assembly, downtime is minimized. When installing, it is recommended to clean the shaft surface of any debris, apply a light coating of anti-seize compound if the operating temperature exceeds the material’s upper limit, and verify that the sleeve rotates freely before final tightening. Regular visual inspections should focus on signs of wear, overheating, or corrosion, although the sintered bronze’s inherent resistance often delays such issues.
Routine maintenance for these sleeve bearings is straightforward due to their self-lubricating nature. Operators should perform a visual check at regular intervals, looking for signs of excessive wear, discoloration, or debris accumulation. If the sleeve exhibits abnormal noise or increased resistance during rotation, it may indicate that the lubrication film has been compromised, and the part should be inspected for surface damage. In such cases, cleaning the shaft with a non-abrasive solvent and reinstalling a new sleeve is recommended. Because the material tolerates a wide temperature range, there is no need for periodic re-greasing, which reduces labor costs and the risk of over-lubrication that can attract contaminants. Proper storage of spare sleeves in a dry environment further extends their shelf life.
Best practices recommend aligning the shaft and flange precisely before insertion to avoid misalignment that could cause uneven wear. Using a light torque wrench to secure the flange at the manufacturer-specified torque ensures consistent clamping force without over-stress. When operating in dusty environments, installing a simple dust cover over the bearing can further extend its lifespan by preventing abrasive particles from entering the contact surfaces.

Why Choose Us

Choosing uxcell means selecting a brand that prioritizes material science, manufacturing precision, and customer satisfaction. Our sintered bronze sleeves are produced using a powder-metallurgical process that ensures uniform density and eliminates internal voids, resulting in a component that can withstand heavy loads and abrasive conditions. Each batch undergoes rigorous quality control, including dimensional checks, hardness testing, and surface roughness evaluation, to meet or exceed industry standards for sleeve bearings. The self-lubricating nature of the material reduces maintenance intervals, which translates into lower total cost of ownership for end users. Additionally, uxcell provides responsive after-sales support, offering technical assistance, replacement parts, and warranty coverage for any manufacturing defects. Our commitment to continuous improvement is reflected in the positive feedback from customers worldwide, who appreciate the combination of durability, performance, and affordability that our products deliver.
Our production facilities are ISO 9001 certified, ensuring that every batch of sleeves follows a documented quality management system that tracks material sourcing, process parameters, and final inspection results. We also comply with RoHS directives, guaranteeing that the alloy contains no hazardous substances above regulated limits, which is important for customers concerned with environmental impact and regulatory compliance. To further demonstrate durability, we subject sample units to accelerated life testing that simulates millions of load cycles under extreme temperature fluctuations, confirming that the bearings retain their dimensional stability and friction characteristics. Sustainability is a core value; the powder-metallurgical process reduces material waste compared to traditional machining, and the long service life of the bearings minimizes the frequency of replacement, contributing to lower overall resource consumption.
uxcell’s after-sales service includes a dedicated technical helpline staffed by engineers who can advise on proper selection, installation, and troubleshooting of the sleeve bearings. Customers receive a 12-month warranty covering any manufacturing defects, and defective units are replaced at no additional cost. We also offer bulk-order discounts and fast shipping options for industrial clients who require large quantities for production lines. Our online portal provides access to downloadable CAD files in STEP and IGES formats, enabling seamless integration into CAD assemblies and reducing design time. Feedback from our global user community is continuously incorporated into product improvements, ensuring that each new batch benefits from real-world performance data.

Key Features

• Self-lubricating sintered bronze eliminates the need for external greases, saving time and maintenance costs.
• Precise 8mm bore and 12mm outer diameter provide a secure fit for standard shafts, ensuring reliable operation.
• Robust 16mm flange with 2mm thickness simplifies installation and offers strong housing support.
• Wide operating temperature range from -80°C to 120°C allows use in both cold-room and high-heat environments.
• Dedicated uxcell customer service offers technical guidance and warranty support for peace of mind.

FAQ

What does self-lubricating mean for these bearings?

The sintered bronze material contains embedded lubricating particles that release a thin film during operation, reducing friction without the need for additional oil or grease.

Can these sleeves be used on shafts larger than 8mm?

These sleeves are designed specifically for an 8mm bore. For larger shafts, a different size sleeve should be selected to maintain proper clearance and performance.

How do I install the flange sleeve on my equipment?

Press the flange onto a flat mounting surface or bolt it in place, then slide the sleeve onto the shaft. No additional fasteners or adhesives are required, and the self-lubricating surface begins working immediately.

Are these bearings suitable for high-speed applications?

Yes, the low friction coefficient and excellent heat dissipation of sintered bronze make these sleeves appropriate for moderate to high speed operations, provided the load and temperature stay within the specified limits.