Hydraulic Pump Bushings
Under high pressure and temperature, a mixture of PTFE and lead is impregnated into a porous bronze layer sintered onto a steel backing. The sliding layer, consisting of low-friction PTFE, the bronze interlayer that distributes heat generated during operation, and the mechanically strong steel backing together form a highly durable, self-lubricating composite bearing element that requires no additional lubrication.
During initial operation, part of the PTFE and lead mixture transfers onto the mating surface, forming a thin lubricating film. This creates a smooth surface and a low-friction running layer. As operation continues, sections of the underlying bronze layer gradually become visible in varying sizes and areas on the sliding surface. By the end of the service life, the bronze structure typically covers 70–90% of the running surface.
Features
- Suitable for dry (non-lubricated) and hydrodynamic operation
- High speed and load-carrying capacity
- Suitable for radial, linear, axial, and oscillating sliding movements
- Low coefficient of friction
- Smooth, uninterrupted sliding performance
- Low wear and excellent service life
- Low tendency to seize or weld to other metals
- Wide operating temperature range
- High chemical resistance and compatibility with various fluids
- Non-absorbent structure ensuring dimensional stability
- Good thermal and electrical conductivity
- Low vibration and quiet operation
- Resistance to dust and foreign particles
- Compact design and lightweight structure
- Easy installation
- Low cost
- Wide range of standard sizes and easy availability
- Compliance with environmental safety standards
A mixture of POM and lead is rolled under high pressure and impregnated into a porous bronze layer sintered onto a steel backing. The sliding layer made of POM, the bronze layer that distributes heat generated during operation, and the mechanically strong steel backing together form a low-maintenance composite bearing element with excellent performance characteristics. Lubrication applied only during assembly is sufficient for long-term use, and with periodic lubrication at appropriate intervals, the service life can be significantly extended.
Features
- Suitable for lubrication only during assembly and for hydrodynamic operation
- High speed and load-carrying capacity
- Suitable for radial, linear, and oscillating sliding movements
- Low coefficient of friction
- Smooth and continuous sliding performance
- Excellent resistance to edge loading
- High resistance to impact loads
- Low wear and long operating life
- Extended maintenance intervals
- Low tendency to seize or weld to other metals
- Wide operating temperature range
- High chemical resistance and compatibility with various fluids
- Non-absorbent structure ensuring dimensional stability
- Good thermal and electrical conductivity
- Low vibration and quiet operation
- Unaffected by dust and foreign particles
- Compact design and lightweight structure
- Easy installation
- Low cost
- Wide range of standard sizes and easy availability
- Compliance with environmental safety standards
Made of bronze alloy, featuring lubrication pockets on the sliding surface. These bushings offer long service life and high resistance to wear, chemicals, and corrosion, while providing excellent load-bearing capacity and thermal conductivity.
Primary applications include lift equipment, construction machinery, agricultural and mining machines, automobiles, tractors, trucks, various automotive systems, and industrial machinery.
Bi-metal bushings consist of two layers. They are produced by sintering a bronze alloy onto high-quality steel. They can operate with no lubrication or minimal lubrication; however, liquid oil or grease may be applied periodically to enhance performance. The sliding surface may feature lubrication pockets, grooves, or a smooth finish. These bushings offer long service life, high load-carrying capacity, and excellent resistance to wear, vibration, high temperatures, chemicals, and corrosion, along with superior thermal conductivity.
Primary applications include automotive engines and motorcycle engines, clutches, gearboxes, camshafts, and steering shafts. They are also widely used in hydraulic cylinders and pumps, refrigerator compressor pumps, construction machinery, lift equipment, pneumatic systems, medical devices, and textile machinery.
Additional major application areas include king/piston pins, rocker arms, connecting rods, transmission systems, distributors, clutch pilots, starter motors, generators, mills, oil pumps, gear pumps, water pumps, main shafts, connecting rod shafts, camshafts, intermediate shafts, balance shafts, cup rollers, agricultural machinery, press/compacting equipment, cooling systems, and high-load, high-speed internal combustion engines, as well as spring eyes, trunnions, and many other industrial systems.