Description
Bimetal strip from tin-aluminum alloy, Bimetal Bearing for internal combustion engine connecting rod.
Viiplus offers a broad range of sizes, forms, and materials in monometallic and bimetallic bearings. Bimetal and metal bearings offer excellent corrosion resistance in industrial outdoor applications and in water, marine, and offshore environments. Viiplus bearings can be made in many sizes and forms, including thin-walled, thick-walled, flanged, cylindrical, sintered and oil-impregnated, and more.
Bimetal-bearing is a bimetal bearing, wrapped of steel sheets with a layer of lead bronze.
The standard sizes are fitted with lubrication indents on the running surface. For standard bearings is normally the steel backing copper plated to improve the corrosion resistance. The layer of lead bronze makes it possible to use these bearings with relatively long lubrication intervals.
Bimetal-bearings can be manufactured with a thicker lead bronze layer for applications where the bearing has to be machined after mounting. The material of the layer can be fitted to the special needs of the application in question.
Bi-Metal Self-Lubricating Bearing
High tin aluminum plain bearing
High tin aluminum bearing is made of steel-backed with AISn20Cu Rolled on the surface.
The aluminum bearing product has the characteristics of moderate fatigue strength, bearing capacity, good corrosion resistance, and good sliding performance.
| Standard white metal bearing, Heavy maintenance |
| TECHNICAL DETAILS |
| Specific load capacity static | to ≤ 100 [N/mm2] | Temperature strain | -10 [°C] to +200 [°C] |
| Specific load capacity dynamic | to ≤ 70 [N/mm2] |
| Sliding speed | ≤ 25 [m/s] | Max. PV-value | 6.0 [N/mm² x m/s] |
| Friction value | 0.08 [µ] to 0.17 [µ] depending on lubrication |
| MATERIALS |
| Support material | Steel, tin-plated | Sliding layer | AlSn20Cu |
| TOLERANCE DETAILS |
| Housing Ø | H7 | Shaft tolerance | f7 to h8 |
| Bushing inner-Ø after mounting | H9 |
| SHAFT MATERIAL |
| Steel, hardened or untempered |
| Surface roughness ≤ Ra 0.8 |
| PROPERTIES |
| For high rotational speeds in a sealed and oil-lubricated application. |
Application
This high tin aluminum bearing product is commonly used as medium and small power internal combustion engine bearing bush, train engine bearing bush, air compressor bearing bush, is a new bushing product to replace babbitt alloy.
Normal Thickness of Bearing Bushing Tolerances of Series (non-machinable)
| Normal Thickness | Tolerances of Series B (non-machinable) | Tolerances of Series C (non-machinable) |
| 1.0 | -0.025 | +0.25
+0.15 |
| 2.0 | -0.030 | +0.25
+0.15 |
| 2.5 | -0.035 | +0.25
+0.15 |
| 3.0 | -0.040 | +0.30
+0.15 |
| 3.5 | -0.045 | +0.30
+0.15 |
| 3.5 | -0.050 | +0.30 |
Technical data
| Material: | Copper plated steel backing, lead bronze layer (CuPb10Sn10) |
| Yield point: | (Rp0,2) ca 240 N/mm2 |
| Tensile strength: | (Rm) ca 350 N/mm2 |
| Hardness: | ca 90 – 110 HB |
| Friction: | Depends on the material and the performance of the layer. |
| Max speed: | 3,0 m/s |
| Temperature range: | -100 / +260 °C |
| Load | Speed |
| Ca: 240 N/mm2 | 0 m/s |
| 120 N/mm2 | 0,01 m/s |
| 40 N/mm2 | 2,0 m/s |
Benefits:
- Rather high load capacity.
- Possibility to machine the inside diameter after mounting.
- High-level thermal conductivity.
- Good chemical resistance.
- Wide range of temperature.
Special:
- In- or outside lubrication grooves.
- Several alternative layer materials.
- Without lubrication indents.
- Other positions of tolerance.
- Flat or spherical thrust washers.
- Drawing details.
Application field
Construction machinery: chassis walking mechanism supporting wheel shaft sleeve, towing wheel shaft sleeve, tension wheel shaft sleeve; Automobile industry: balance shaft bushing, steel plate pin bushing, steering knuckle-main shaft bushing, connecting rod bushing, valve rocker arm bushing, camshaft bushing, differential bushing, gearbox bushing, internal combustion engine spindle bushing, thrust gasket; And plunger pump side piece, gear pump side piece, etc.
