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Gasket cast bronze graphite plugged bronze bushings, also known as oilless bearings, are a type of self-lubricating bearing system that utilizes the unique properties of graphite and bronze to provide superior wear resistance and durability.
These bushings are cast from bronze alloy, often C86300, which is a high-tin bronze alloy that offers excellent corrosion resistance and mechanical strength. The graphite plugs or inserts within the bushings provide a continuous lubricating film between the moving surfaces, eliminating the need for external lubrication.
The gasket design of these bushings allows for easy installation and replacement, while also providing a seal against contaminants and moisture. This ensures that the bearings remain in optimal condition, even in harsh environments.
Graphite plugged bronze bushings are commonly used in a wide range of applications, including robotics, heavy machinery, and industrial equipment. They are ideal for applications where lubrication is difficult or undesirable, as well as for applications that require long-term reliability and durability.
In summary, gasket cast bronze graphite plugged bronze bushings, or oilless bearings, offer a self-lubricating bearing solution that provides superior wear resistance, durability, and ease of installation and maintenance.
Our VIIPLUS plain bearings are available in metric and imperial sizes from stock. Our in-house machining service is able to produce non-standard sizes to suit specific customer requirements.
Grade | 50# | 50S1 | 50S2 | 50S3 | 650S5 |
Material | CuZn25AI5Mn4Fe3 | CuSn5Pb5Zn5 | CuAI10Ni5Fe5 | CuSn12 | CuZn25AI5Mn4Fe3 |
Density | 8 | 8.9 | 7.8 | 8.9 | 8 |
Hardness | ≥210 | ≥70 | ≥150 | ≥75 | ≥235 |
Tensile strength | ≥750 | ≥250 | ≥500 | ≥270 | ≥800 |
Yield strength | ≥450 | ≥90 | ≥260 | ≥150 | ≥450 |
Elongation | ≥12 | ≥13 | ≥10 | ≥5 | ≥8 |
Coefficient o linear expansion | 1.9×10-5/℃ | 1.8×10-5/℃ | 1.6×10-5/℃ | 1.8×10-5/℃ | 1.9×10-5/℃ |
Max.Temp. | -40~+300℃ | -40~+400℃ | -40~+400℃ | -40~+400℃ | -40~+300℃ |
Max.dynamic load | 100 | 60 | 50 | 70 | 120 |
Max.speed(Dry) | 15 | 10 | 20 | 10 | 15 |
N/mm²*m/s(Lubrication) | 200 | 60 | 60 | 80 | 200 |
Compression deformation | < 0.01 mm | < 0.05mm | < 0.04mm | < 0.05mm | < 0.005mm |
Product NO. | Chemical Compositions | ||||||||
TOB 050 | Cu | Zn | Al | Fe | Mn | Si | Ni | Sn | Pb |
60~66 | 22~28 | 5.0~8.0 | 2.0~4.0 | 2.5~5.0 | <0.1 | <0.5 | <0.2 | <0.2 |
Type | Spec. | Type | Spec. | | |
THRUST WASHER | PLUGGED GRAPHITE | 30~10.2~3 | THRUST WASHER | 90~45.2~7 | |
THRUST WASHER | PLUGGED GRAPHITE | 40~12.2~3 | THRUST WASHER | 100~50.3~8 | |
THRUST WASHER | PLUGGED GRAPHITE | 40~13.3~3 | THRUST WASHER | 110~55.3~8 | |
THRUST WASHER | PLUGGED GRAPHITE | 50~14.2~3 | THRUST WASHER | 120~60.3~8 | |
THRUST WASHER | PLUGGED GRAPHITE | 50~15.2~3 | THRUST WASHER | 125~65.3~8 | |
THRUST WASHER | PLUGGED GRAPHITE | 50~16.2~3 | THRUST WASHER | 130~70.3~10 | |
THRUST WASHER | PLUGGED GRAPHITE | 50~18.2~3 | THRUST WASHER | 140~75.3~10 | |
THRUST WASHER | PLUGGED GRAPHITE | 50~20.2~5 | THRUST WASHER | 150~80.3~10 | |
THRUST WASHER | PLUGGED GRAPHITE | 55~25.2~5 | THRUST WASHER | 170~90.5~10 | |
THRUST WASHER | PLUGGED GRAPHITE | 60~30.2~5 | THRUST WASHER | 190~100.5~10 | |
THRUST WASHER | PLUGGED GRAPHITE | 70~35.2~5 | THRUST WASHER | 200~120.5~10 | |