ZY Bimetal Bearings Series > ZY-800 Bimetal bushing
ZY-800 Bimetal bushing
It’s made of high quality low-carbon steel plate, sintered porous bronze as its interlayer and the compound of PTFE material and Pb as its surface. It can offer the properties of good self-lubricating anti-abrasion, low-friction, fully develop the advantages of metal and multi-element polymer.It's used in steel metallurgical industry, such as those used in roller grooves of successive casting machines, cement grout pump and spiral conveyers for cement etc.
| 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 | ZY-800 | ZY-720 | ZY-700 | ZY-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 | ZY-800 | ZY-720 | ZY-700 | ZY-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 | ZY-800 | ZY-720 | ZY-700 | ZY-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 |
| Metallographies |  |
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| 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 |
| The strongest type, wide application field, most suitable for high impact vibrating load bushes and Washers. | ReIative 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, reIative good sIiding performance. NormaIly applied in half bushs of high speed, low load inner combustion engine aircompressor, refigerator bearings. |
ZY Bush's grovves & indentations
Lock types of ZY wrapped bushes
The Designing of Oil Indentations
In order to fully lubricate the bush when in the performance, the indentations with size as follows are recommended. They should be manufactured according to the standard below if without special requirements.
| Bush O.D. | From To | 14~22 | 22~40 | 40~50 | 50~100 | 100~180 |
|---|---|---|---|---|---|---|
| Lubricating(mm) | 3 | 3 | 3 | 6 | 7 | |
| The lubricating hole should be away from butt joint and loading aera and designed to be easy-oil-feeding as well. | ||||||
Appliation
- FJ bimetal bearings take steel backing as base．The bearings are sintered with CuPb10Sn10, CuPb24Sn4, CuPb30, CuSn6Zn6Pb3 or AlSn20Cu 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 adding oil ways and prevent the bearings from g ripping shaft.