SF-2X boundary lubrication bearing
Metallographic analysis and material structure
1. Mixture of POM and lead 0.3-0.5mm
2. Porous bronze powder 0.2-0.3mm
3. Steel backing 0.4-2.2mm
4. Electroplated coating: copper layer 0.008mm
Product description
SF-2X boundary lubrication bearing is based on the matrix of steel
plates, with the porous bronze powder sintered in the middle while
the modified POM rolled in the surface, which also has the oil
storage pit. It can replace the ordinary copper bush in the low
speed site with moderate load under ambient condition, not only
reducing the cost but also lengthening the service life.
In some special cases, it can save the refueling frequency and
simplify the replacement procedure when applied in the rolling
machine. Such product has already been widely used in the
automobile chassis, forging machine tool, metallurgical mine
machinery, engineering machinery, water and electricity, and steel
rolling industry.
Tech.Data
Maximum load pressure: 70N/mm2
Operating temperature range:-40~+130°C
Maximum sliding speed: 2.5m/s
Friction coefficient0.05~0.25
Maximum PV value allowed: 2.8N/mm2.m/s
Maximum PV value allowed: 22N/mm2.m/s
Product characteristics
1. Excellent bearing and wear-resistant performance.
2. It is suitable to the rotation motion under high load low speed,
oscillating motion, and the sites frequent start/close under load
which is not prone to forming the hydrodynamic lubrication.
3. The long-time oil free maintenance can be allowed under the
boundary lubrication condition, but the oil can be used during the
process to make the service life of bearings longer.
4. Certain allowance can be reserved on the plastic layer on the
surface during the processing and molding and the assembly can be
processed arbitrarily after pressed into the base hole, so as to
achieve better mounting dimension.
5. The product is mainly applied in the automobile chassis,
metallurgical machinery, mine machinery, hydraulic machinery,
construction machinery, agriculture machinery, and steel rolling
equipment.
Chemical properties
| Bearing designation | In the air | In the vacuum | In the water | In the steam | In the weak acid | In the moderate acid | In the strong acid | In the alkaline solution |
| SF-2X | good | good | good | good | bad | no | no | good |
| Designation | Test time | Test condition | Friction coefficient | Final temperature (°C) | Final wear loss (mm) |
| Lubrication | Speed | Pressure |
| SF-2X | 3hr | fat | 0.4m/s | 3.5N/mm2 | 0.071 | 40 | 0.006 |
