Split bearings refer to parts designed and produced on the basis of integral bearings through a special process. Split bearings are suitable for many fields, such as: large-scale conveying equipment, co-cast roll supports, elevators and conveyors, paper machinery and other industrial fields. Installation is also very important for the use of split bearings. In order to allow everyone to better install the split bearings, Eric Bearing Limited shares the installation steps of SKF split bearings below.
1. Install the bearing base
Install the bearing base or the lower half of the flange in the desired position. If the bearing seat needs to be accurately positioned, it can be bolted to its position. Usually to accurately position the shaft, the bearing base may need to be moved slightly during subsequent installation steps.
2. Install the inner ring
Gently apply engine oil to the shaft, and then wipe off excess engine oil with a dry cloth. Install the inner ring in the correct position on the shaft. Place the soft sticker or feeler gauge at the seam of the two inner halves, ensuring that the gap between the two seams is approximately the same. The inner ring of the free-end bearing is usually installed in the center of the outer ring, but there is a special case in which the free-end bearing allows a little axial offset. (In this case, the maximum offset is usually 10% of the roller length, but special types of bearings have larger offsets.)
3. Install the clamping ring
When installing the clamping ring, the joint of the clamping ring and the joint of the inner ring should form an angle of about 90° (the large bearing has 4 clamping rings, and the angle is 45°). Then tighten all bolts on the clamping ring. Use a soft hammer to tap each piece of the inner ring and clamping ring on the shaft, or place a wooden block between the steel hammer and the SKF bearing component to beat. Tighten the clamping ring bolts again. Repeat this action until the bolt is fully tightened. Check the seams of the two pieces (or 4 pieces in total) of the clamping ring, the gap should be approximately equal.
4. Install the cage and roller
Apply grease to the cage and rollers, and lightly apply grease to the surface of the inner ring (installed on the shaft) as a protection. Install the cage (together with the rollers) on the inner ring. The two cage halves are snapped together, and the different ways depend on the size and SKF bearing series.
5. Installation of bearing housing and outer ring
Install half of the outer ring with lubrication holes in the upper half of the bearing box, and the other half of the outer ring in the lower half of the bearing box. Ensure that the end faces of the outer ring protruding from the bearing housing match. All outer rings with ribs must be clamped axially. Lateral positioning bolts can be installed on all fixed end bearing boxes. The side jack can only be installed on some models. Radial bolts and washers can only be installed on the bearing housing of the fixed end and free end large bearings.
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Free end bearing box:
Put the radial bolts and washers into the corresponding holes in the outer ring, but do not tighten them. Put the two halves of the bearing housing together with the outer ring, and fully tighten the connecting bolts. Fully tighten the radial bolts. Bearing housings with flanged outer ring (fixed and special models): Put radial bolts and washers into the corresponding holes in the outer ring, but do not tighten them. Put the two halves of the bearing housing together with the outer ring, and fully tighten the connecting bolts. Put in the lateral mandrel (installation position) and lateral positioning bolt. Then fully tighten the lateral positioning bolts and radial bolts (installation position). All types: Fill the oil circuit with grease. Loosen the connecting bolts and separate the bearing housing. Be careful not to slide the outer ring out of the respective half of the bearing housing.
6. Install the sealing ring
If installing a three-layer aluminum seal ring, the installation steps are as follows: separate the three-layer aluminum seal ring by pulling out two pins. Grease the "O" ring in the hole. Reinstall the "O" ring on the shaft and reinsert the pin. Note: Once installed, the three-layer aluminum seal ring can slide along the shaft. The felt ring seal should be soaked in lubricating oil before being installed in the groove at the end of the bearing housing. Other seal types such as three-layer ring seals must be installed in the groove at the end of the bearing box before installing the bearing box.
7. Apply grease
Apply grease to the inside of the bearing housing, cage, rollers and all seals. For the rotation speed exceeding 150,000mm dn (shaft diameter in mm × shaft speed in rpm), approximately 40% of the grease should be applied to the bearing part, and the rest should be applied to the bearing housing. In this way, excessive agitation of excessive grease can be avoided during high-speed operation.
8. Paint the bearing box up and down
Apply grease to the lower part of the bearing housing. Place the lower part of the bearing housing on the top of the bearing and rotate it 180° to slide it into the lower part of the bearing housing. Place the upper part of the bearing housing on the lower part, fasten the bearing housing and fully tighten the connecting bolts. Apply grease to the bearing housing ball.
9. Installation of bearing seat
Tighten the bolts of the base or the lower half of the flange at the installation position. Install the top cover of the bearing housing or the upper part of the flange. If for safety reasons, the shaft can run for a period of time before the bearing housing connecting bolts are not fully tightened, so that the bearings can be accurately calibrated. Fully tighten the connecting bolts.