Exalign with sintered bronze bushes
 

We now offer a full range of EXALIGN units fitted with Oilite self lubricating sintered bronze bushes.

Information for Oilite bushes can be found at the following link www.bsaoilite.com/

Dimensions for Metric shafts will be added later.

Technical information

Lubrication
Standard OILITE bearings are impregnated with a highly refined mineral oil to ISO VG (SAE 30) having a high viscosity index and containing anti-oxidant, anti-rust and defoamant additives.

A replenishment of oil should be carried out after 1000 hours of use or yearly. These intervals can be extended for
bearings with relatively thick walls and shortened for low porosity bearings. Bearings running submerged in oil or in oil-splash will not require replenishment.

The standard operating temperature range is -9ºC to +70ºC and a special range of lubricants is available to cater for for running temperatures -60ºC to +230ºC.

To prevent possible seizures with stainless steel or hard-chromium plated shafts, an addition of molybdenum disulphide to the impregnation oil must be specified.

Any particular application thought to be outside standard conditions should be referred to the Oilite  Technical Department who can be contacted on: +44 (0) 1473 233300.

However, here are some basic rules:
1. Low viscosity oil for low temperatures, high speeds or light loads
2. High viscosity oil for high temperatures, low speeds or heavy loads
3. High viscosity index oil for wide variations in operating temperatures
4. Oxidation stable oils for long-period usage
5. Oil with ‘oiliness’ additives for boundary conditions
6. Oil of lesser ‘oiliness’ for full film (hydrodynamic) conditions
7. Oil with Extreme Pressure (E.P.) additives for very heavy or shock loads

 The bearing must be free from grit and dust. Wash in oil if storage conditions are in doubt and re-oil if held in stock for more than a year or if stored in contact with an absorbent material.

 Shafts should ideally be hardened to approximately HRC 60 and ground to a surface roughness of Ra = 0.25 µm.

The standard inch range of OILITE bearings is made to fit H8 housings and the majority will give H8 fitted bores, and designed for an f7 shaft.

The standard metric range of OILITE bearings to ISO 2795 is made to G7/s7 limits of tolerance. These bearings when fitted into a rigid H7 housing, using an m5 fitting pin, will give an H7 bore, which when run on an f7 shaft will give good performance.

OILITE bearings can be stored for considerable periods without deterioration or loss of oil if kept in a metal or other non-absorbent container, at room temperature. Proximity to heat could cause oil loss by sweating, in which case re-oiling is necessary before fitting.

After machining of the bearing, or following oil loss during storage, immerse in high quality mineral oil to ISO VG 68 or ISO VG 150 (SAE 30 or SAE 40) at 60°C to 70°C for 10 to 15 minutes and then cool in cold oil.

All the metric (ISO) bearings  are manufactured to the tolerances set out in ISO 2795 - Plain Bearings from Sintered Material.

ISO 2795 is the standard used by the BSI for this type of bearing; it is also widely used in other European countries.