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| MOQ: | negotiable |
| Price: | Negotiable |
| Payment Terms: | T/T |
| Supply Ability: | bronze sleeve bushings, China, manufacturers, suppliers, factory, wholesale, Metallic Self Lubricating Bushings, Cast Iron Bearing, Sleeve Bushing, POM Bearing, Cast Iron Plain Bearing, Lubrication Bronze Bushing |
Wrapped composite dry sliding bearing Bronze / DIN 1494 / ISO 3547 Maintenance-free Excellent sliding and wear.
TECHNICAL DETAILS
Makes the world go round
Excellent sliding and wear behaviour, for all types of movement, high load capacity, good corrosion resistance, non-magnetic
| Sliding surface: | |
| Support material: | Bronze or steel bushing |
| Dynamic load: | ≤ 140 N/mm² |
| Static load: | ≤ 200 N/mm² |
| Sliding speed: | ≤ 2,5 m/s |
| Fricition value: | 0,02 - 0,20 µ |
| max. PV-value: | 1,8 N/mm² x m/s |
| Temperature strain: | -200 up to +280 °C |
| Maintenance: | maintenance-free |
| Tolerance housing: | H7 |
| Tolerance after mounting: | H9 |
| Shaft tolerance: | f7 or f8 |
| Shaft material: | Steel, hardened or untempered, roughness Rz < 2-3 |
plain bearings- embodies the principle of permanently low-wear gliding.
Depending upon customer requirements and specific applications, a number of maintenance-free and lowmaintenance materials are available with identical microstructure. A porous bronze sinter structure applied to a steel or bronze back and is impregnated with the respective plastic mix. The solid lubricant produces a film between the sliding surfaces. It attributes to low-noise operation at constant speeds and low coefficients of friction throughout the entire service life of the component. This is achieved by means of a mixture of (Poly Tetra Fluoro Ethylene) with wear-retardant and thermally conductive additives.
It is not possible to find the desired solution for plain bearing applications with products made of maintenance-free materials for all duties and applications. For such duties and applications, low-maintenance materials are available. In this case, the sliding surfacetaking up the wear load is formulated from a PVDF (Polyvinylidene Fluoride) matrix.
Material production
The solid lubricant mass is produced in a specially adapted mixing process. In a parallel, continuous sintering operation, bronze powder is sintered onto the steel or bronze back as a sliding layer. This produces a sliding layer with a thickness from 0.2 mm to 0.35 mm and a pore volume of approx. 30 %. Next, the cavities are filled with solid lubricant by means of impregnating rollers.
This process step is controlled in such a way that a running-in layer of solid lubricant up to max. 0.03 mm thick is produced above the sliding layer. In further thermal treatments, the characteristic properties of the material system are adjusted, and the required thickness tolerances of the composite material are produced using controlled roller pairs.
1.Maintenance-free operation under dry-running conditions
2.Rotating or oscillating movements
3.Up to a velocity of 2 m/s
4.Linear movements
5.Temperature range -200 °C to 280 °C
The unique features:
| Characteristics | Unit | P20, P22*, P23* | P200, P202*, P203* |
| Unleaded | – | No | Yes |
| pvmax | MPa · m/s | 3 | 3.3 |
| pmax.stat. | MPa | 250 | 250 |
| pmax.dyn. | MPa | 70 at v ≤ 0.042 m/s | 70 at v ≤ 0.047 m/s |
| vmax | m/s | 3 at p ≤ 1.00 MPa | 3.3 at p ≤ 1.00 MPa |
| T | °C | -40 to +110 | -40 to +110 |
To reduce the coefficient of friction and improve thermal conductivity, special additives are mixed into the matrix. In addition, the surface of the sliding layer may optionally be equipped with lube bore relieves to accommodate grease or oil.
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