FITTING METHODS

The Most commonly used method for fitting the bushing is to press them into the housing. Having created the correct housing (H7), the following steps should be taken:

• Chamfer the lead-in to the housing by 20°+/-  5° to a depth of 1-2mm
• Deburr and clean the mating surfaces
• Lubricate the outside surface of the bushing before fitting it (do not apply excessive lubricant as it may cause the bushing to move about when fitting in the housing)
• Check the alignment of the axes between the bushing and the housing
• Where several bushings are necessary, align the butt joints
• It is always advisable to use a guiding mandrel to insert the bushing in their housing

Press fitting is usually carried out using hydraulic, pneumatic or mechanical equipment (fig 1).

To fit bushings with a diameter or more than 55 mm, it is advisable to use a retaining ring with a diameter that is 0.3/0.4 mm larger (fig 2)

For flange bushings (fig. 3), the chamfer on the lead-in must have an angle of 45° and a depth of at least 2 mm (2.55 for a bushing with a wall thickness of 2.5 mm).