Industrial equipment designers often need a bearing solution that can handle high loads, low speeds, and dirty environments without regular maintenance. Our wear resistant PTFE bushing with bronze meets that demand through a three-layer composite structure engineered for long service life. This design forms the core of our bronze filled PTFE bushing for rotating shaft product line, which is widely used in agricultural machinery, hydraulic cylinders, and material handling systems. For operations that require zero re-lubrication, our self lubricating bronze PTFE bearing bushing incorporates a solid lubricant fill that releases during sliding motion. When the application involves shock loads or edge loading, the PTFE bronze bushing heavy duty series offers increased wall thickness and higher static load ratings. As an experienced bronze filled PTFE bushing manufacturer, we maintain tight tolerances and consistent material quality across every batch.
The wear resistant PTFE bushing with bronze is built on a low-carbon steel backing for mechanical strength, with a porous sintered bronze layer that anchors the PTFE compound. During initial operation, a thin PTFE film transfers to the shaft, creating a low-friction interface that eliminates stick-slip and reduces wear. The bronze matrix also conducts heat away from the sliding surface, allowing the bearing to run at higher PV values than pure polymer bushings. Because the structure is self-lubricating, it performs reliably in applications where grease or oil cannot reach, such as pivots, linkages, and hinge points. The bushing is available in inch and metric sizes, with optional flanges, lubrication holes, and grooves for special installations. Standard wall thicknesses range from 0.75 mm to 2.5 mm, and custom dimensions can be produced for prototype or high-volume requirements.
Below are the standard parameters for the wear resistant PTFE bushing with bronze. Custom material combinations and dimensions are available upon request.
| Parameter | Standard Specification |
|---|---|
| Inner diameter range | 6 mm – 300 mm (0.236 in – 11.81 in) |
| Outer diameter range | 8 mm – 320 mm (0.315 in – 12.60 in) |
| Length range | 5 mm – 150 mm (0.197 in – 5.91 in) |
| Wall thickness | 0.75 mm – 2.5 mm (0.030 in – 0.098 in) |
| Steel backing hardness | 80 – 120 HV |
| Sliding layer surface finish | Ra ≤ 0.8 μm |
| Permissible misalignment | 0.05 mm per 100 mm length |
| Corrosion resistance | Good in fresh water, hydraulic fluids, and mild acids |
For optimal performance, the mating shaft should be ground to a surface finish of Ra 0.2 – 0.4 μm and hardened to at least 45 HRC. The recommended shaft tolerance is f7 for general applications and h7 for precision guidance. Housing bores should be machined to H7 tolerance with a 15°–30° lead-in chamfer to ease assembly. Press-fit installation requires a mounting tool with a pilot nose to prevent damage to the PTFE sliding layer. After installation, the bushing bore may be sized with a burnishing tool to achieve the final running clearance.
These bushings are commonly specified for hydraulic cylinder pivots, steering linkages, conveyor chain pins, textile machinery guides, and food processing equipment. The combination of bronze and PTFE offers dependable dry running, reduced maintenance costs, and improved wear resistance compared to conventional bronze or polymer bearings in slow-speed, high-load conditions.
Non-standard inner diameters, thicker walls, flanged configurations, and special PTFE compounds with graphite or carbon fiber fillers are available for demanding applications. We also offer machined lubrication grooves, axial slots, and chamfered ends to match existing assembly processes. All products are manufactured under ISO 9001 quality control with traceable batch records and dimensional inspection reports.
