Device and method for mounting a bearing on a roll neck and for removing the bearing from the roll neck

A method for mounting a bearing (200) on a section (I) of the roll neck (320) close to the body with the aid of a device (100), comprising the following steps:

• prepositioning the bearing (200) on the section (I) of the roll neck (320) close to the body;
• prepositioning the device (100) on the section (II) of the roll neck remote from the body;
• mounting the stop ring (130) at the end of the roll neck (320) as a stop, fixed in the axial direction (A), for the inner piston (110);
• applying a mounting pressure to the mounting pressure chamber (1), thereby causing the inner piston (110) to move axially outward against the stop ring (130) and causing the cylinder (120) to move axially inward against the bearing (200), and drawing the bearing (200) onto the section (I) of the roll neck (320) near the body;
• characterized in that
• the device (100) is configured according to any one of the preceding claims, and in that the method further comprises the following steps:
• applying a displacement pressure to the positioning pressure chamber (3), thereby displacing the outer piston (140) axially outward away from the roll body, and eliminating a first contact surface (126) between the inner flange (144) of the outer piston (140) and the outer flange (152) of the nut (150);
• and
• rotating the nut (150) relative to the cylinder (120) in the direction of the roll body to secure the bearing in the axial direction (A);
• securing the nut (150) with the locking piece (160).

A method for removing a bearing (200) from a section (I) of the roll neck (320) close to the body with the aid of the device (100) according to any one of the preceding claims, comprising the following steps:

• removing the securing element (160);
• applying a mounting pressure to the mounting pressure chamber (1), so that the cylinder (120) is pressed with greater force against the bearing (200) and a second contact surface (128) between the cylinder (120) and the nut (150) is eliminated;
• applying a displacement pressure to the positioning chamber (3) to displace the outer piston (140) away from the roll body;
• rotating the nut (150) axially outward back away from the cylinder (120), preferably until the outer flange (152) of the nut meets the inner flange (144) of the outer piston (140);
• reducing the mounting pressure in the mounting pressure chamber (1);
• and
• applying a removal pressure to the removal pressure chamber (2), thereby drawing the cylinder (120) outward axially against the nut (150);
• and removing the stop ring (130);
• removing the device (100) and the bearing (200) attached to the device from the roll neck (320).