RST-JF bimetal bearings take steel backing as base. The bearings are sintered with CuPblOSnlO, CuPb24Sn4, CuPb30, CuSn6Zn6Pb3 or AISn20Cu after press. It can insure the bearings O.D. precision against the friction between O.D. and housing after pressing it into housing because of mild steel as its base. The chemical changes of inner alloy layer can make the bearings work well under various load presses, different working temperatures and sliding speeds. Different structures of oil grooves and oil indentations can satisfy different oil adding ways and prevent the bearings from gripping shaft.
| Nominal Thickness | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 5 |
|---|---|---|---|---|---|---|---|---|
| Thickness of steel backing | 0.6 | 1 | 1.4 | 1.9 | 2.3 | 2.8 | 3.2 | 4 |
| Thickness of bronze layer | 0.4 | 0.5 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 1.0 |
| Manufacturable wall thickness | 1+0.25+0.15 | 1.5+0.25+0.15 | 2+0.25+0.15 | 2.5+0.25+0.15 | 3+0.25+0.15 | 3.5+0.25+0.15 | 4+0.25+0.15 | 4+0.25+0.15 |
| Manufacturab wall thickness | 1-0.025 | 1.5-0.03 | 2-0.035 | 2.5-0.04 | 3-0.045 | 3.5-0.05 | 4-0.055 | 4-0.06 |
| Nominal Thickness | RST-JF-800 | RST-JF-720 | RST-JF-700 | RST-JF-20 |
|---|---|---|---|---|
| Cu | Remainder | Remainder | Remainder | 0.7~1.3 |
| Pb | 9.0~11.0 | 21.0~27.0 | 26.0~33.0 | - |
| Sn | 9.0~11.0 | 3.0~4.5 | 0.5 | 17.5~22.5 |
| Zn | 0.5 | 0.5 | 0.5 | |
| P | 0.1 | 0.1 | 0.1 | - |
| Fe | 0.7 | 0.7 | 0.7 | 0.7 |
| Ni | 0.5 | 0.5 | 0.5 | 0.1 |
| Sb | 0.2 | 0.2 | 0.2 | - |
| Ai | - | - | - | Remainder |
| Si | - | - | - | 0.7 |
| Mn | - | - | - | 0.7 |
| Ti | - | - | - | 0.2 |
| 其它 Other | 0.5 | 0.5 | 0.5 | 0.5 |
| Nominal Thickness | RST-JF-800 | RST-JF-720 | RST-JF-700 | RST-JF-20 | |
|---|---|---|---|---|---|
| Load limit N/mm2 | 150 | 130 | 120 | 100 | |
| Tensile strength N/mm2 | 150 | 150 | 200 | 200 | |
| Speed limit v max. m/s | 5 | 10 | 15 | 25 | |
| Friction coefficient(oil) | 0.06~0.14 | 0.06~0.16 | 0.08~0.16 | 0.08~0.17 | |
| PV limit N/mm2 m/s | Grease | 2.8 | 2.8 | 2.5 | - |
| oil | 10 | 10 | 8 | 6 | |
| "Sapphire"fatigue class | 125 | 115 | 105 | 85 | |
| Material type | RST-JF-800 | RST-JF-720 | RST-JF-700 | RST-JF-20 |
|---|---|---|---|---|
| Specification of bronze | CuPb10Sn10 | CuPb24Sn4 | CuPb30 | AlSn20Cu |
| Equivalent standard code | USA: SAE-797 GERMANY: GLYCO 66 JAPAN: JIS-LBC3 |
USA: SAE-799 GERMANY: GLYCO 68 JAPAN: JIS-LBC6 |
USA: SAE-48 JAPAN: JIS-KJ3 |
USA: SAE-783 GERMANY: GLYCO 74 JAPAN: JIS-AJL |
| Hardness of bronze alloy HB | 70~100 | 45~70 | 30~45 | 30~40 |
| Maz.dynamic Load N/mm2 | 65 | 38 | 25 | 30 |
| Max.temperature | 260 | 200 | 170 | 150 |
| Remark | The strongest type, wide application field, most suitable for high impact vibrating load bushes and Washers. | Relative high fatigue strength & load capacity, good sliding performance. poor oil corrosion resistance. Fit for middle load, middle speed. Normally applied in main bushes of lnner-combustion engine. Connecting rod when plated. | Good seizuring resistance good capacity to submerge foreign, overlayer plated normally applied in main bearings of high speed, low to morderate load inner-combustion engine & connecting rod bearing． | Moderate fatigue strength & load capacity, good corrosion resistance, relative good sliding performance. Normally they are applied in half bush with high speed, low load inner combustion engine, air compressor, refrigerator bearings. |
