I. Pre-installation Preparation

• Prepare tools and fasteners.

• Clean the bearing surface to ensure it is smooth, free of weld slag, and burrs.

• Confirm the model and specifications to ensure the slewing bearing model matches the equipment.

II. Bearing Installation Methods

Press-in Installation:

• Suitable for small and medium-sized bearings.

• Use a press or a special installation sleeve to apply force evenly to the inner or outer ring end face, avoiding direct impact on the bearing.

• Ensure the force is applied perpendicularly to prevent bearing misalignment or uneven stress on the rolling elements.

Thermal Expansion Method：

• Suitable for large or medium-sized bearings with interference fits.

  Place the bearing in a heating furnace or induction heater, controlling the temperature at 80°C–100°C (never exceeding 120°C).

• After heating, quickly assemble and secure it onto the shaft.

• After cooling, a tight fit will automatically form.

Shrink Fit Method:

• Use a coolant (such as liquid nitrogen) on the mating surfaces to shrink the shaft before installing it into the bearing inner ring.

• Temperature difference control should be reasonable to prevent excessive thermal stress on the bearing material.

• Mostly used in high-precision, heavy-duty equipment.

III. Bearing Installation Process

• Lift the slewing bearing to the installation location and align the base bolt holes.

• Tighten the bolts evenly and horizontally to 30%–50% of the design torque.

• Use a feeler gauge to measure the bearing axial play to ensure the slewing bearing is fully seated against the mounting surface.

• Tighten the bolts gradually in a “diagonally intersecting, step-by-step” pattern until the specified torque is reached.

• After tightening the bolts, use anti-loosening measures.

• Check the gear meshing side clearance for uniformity.

• Apply special grease to the tooth surfaces.

• Perform a low-speed test run to check for any abnormal noise, binding, or uneven torque.