Self-lubricating bearings

A self-lubricating sintered bearing is a metallic component with high porosity (20-25% in volume), impregnated in a lubricant oil. The oil contained in the porosity provides a constant lubrication between bearing and shaft, so the system does not need any additional external lubricant. Self-lubrication allows this type of sliding bearing to work under hydrodynamic conditions, resulting in a very low friction coefficient.

Self-lubricating sintered bearings have some advantages compared to other types of dry sliding bearings:

– Reliability. The constant oil presence eliminates the risk of seizure, and allows the bearing to work during thousands of hours without wear.
– Economy. Maintenance-free, no need for lubricants.
– Performance. Able to work under loads of up to 10 MPa, and speeds up to 5 m/s. The maximum working PV is is the range of 5 MPa·m/s, but can be surpassed in special cases. The dimensional precision is very high (up to IT 5 in diameter), and produces extremely low noise.

AMES manufactures three ranges of self-lubricating bearings, as follows:
1. Selfoil® standard bearings. Bearings made in standard dimensions , with spherical or cylindrical shapes, with or without flange. Selfoil® is the best solution for retail, and is available off the shelf.
2. Selfoil® Rods for machining. These bearings are solid or hollow cylinders, to be machined to final dimensions when the system is not ready for standard Selfoil® bearings.
3. Bearings by design. Customized bearings for medium- to high production volumes, specifically designed for a given equipment. Most of AMES bearing production corresponds to this range of OEM bearings.

AMES manufactures the self-lubricating bearings at Simet plant, which is specialised in this product. This plant includes a R&D laboratory specialised in bearings, able to provide customized solutions to their customers, in terms of material choice, oil, shapes, tolerances, and assembly method.

The main applications for self-lubricating sintered bearings are:
1.Automotive electrical or mechanical equipment, such as:
– Starters.
–  Active driving elements: Brakes, steering, transmission, shock absorbers, …
– Cooling: Radiator, fans, cooling systems, ….
– EGR systems.
– Fuel pumps..
– Comfort and Security: Wipers, window regulation, mirrors, seats, sunroofs, …
2. Universal or customized  electric motors and gearboxes of medium-low power.
3. Linear and rotary actuators pneumatic, hydraulic and electromagnetic.
4. Household appliances: Washing machines, fans, extractor fans, shaving machines, depilators, juicers, rostisserie, air conditioning, handtools, coffee machines, wishking machines, vacuum cleaners, lawnmowers, boilers, etc.
5. Home appliances: Locks, garage doors, awnings, roller shutters, sliding windows, office swivel chairs, trolley rolling wheels, hinges, furnitures, gardening, etc.
6. Industrial: Bottling machinery, carpenter machinery, assembly machinery in general, automation, key duplicating machines, sewing machines, industrial vehicles, electrical switchgears, mobility, medical, catering, farm machinery, toys, etc.

AMES may recommend the most appropiate material and design to meet your needs

Basic manufacturing process
Recommended shapes
Advantages of sintering
Complementary manufacturing operations