low price cross roller slewing rings

1.Cross roller slewing rings:

Cross roller slewing rings are bearings for high-precision applications. They comprise outer rings, inner rings, rolling elements and plastic spacers. The outer ring is split and is held together by three retaining rings.

Due to the X arrangement of the cylindrical rollers, these bearings can support axial forces from both directions as well as radial forces, tilting moment loads and any combination of loads by means of a single bearing position. As a result, designs involving two bearing positions can be reduced to a single bearing position.

Crossed roller slewing rings are very rigid, have high running accuracy and are supplied with normal clearance, low clearance or preload. The bearing outer rings are easily fixed to the adjacent construction using clamping rings.

Crossed roller slewing ring is a special type bearing with separated inner ring and rotating outer ring. Since the divided inner ring or outer ring is installed with the rollers and spacers, it is fixed with the cross roller ring to prevent crossing each other, so it is easy to operate when installing the cross roller slewing ring.

Because the rollers are arranged in a cross, only one set of roller rings can cross the load of each direction column of the shaft. Compared with the conventional model, the shaft center is increased by 3 to 4 times.

At the same time, because the inner ring or the outer ring of the crossed roller slewing ring is a two-part structure, the bearing gap can be adjusted, and even if a preset is applied, the ring can generate its rotational movement. Moreover, due to the special structure, pop music is usually used in industrial robots.

2.Introduction to the assembly process of the cross roller slewing ring

1. Inspection of cross roller slewing ring parts

Check the appearance for bumps or rust spots, if there are serious bumps, rework, check the external dimensions, check whether the workpiece is consistent with the assembly drawings, avoid missing processes after equipment and rework, carefully check the inner and outer ring raceways to find the soft belt, in the corresponding Mark S on the slewing bearing plane, and find the number of grinding parts, and place the inner and outer rings with the same number accordingly.

2. Rust removal

If there are rust spots on the cross roller slewing ring parts, lightly rub with a scouring pad and cleaning agent for slight rust, and use an angle grinder to install a film for serious rust (except raceway).

3. Remove cross roller slewing ring burrs and bumps

Pay attention to check the installation holes, oil holes, the chamfers of the inner and outer rings and the sealing grooves for burrs and bumps, and polish them with scouring pads or sandpaper.

4. Blocking and grinding requirements

Find the small end of the taper pin, take out the taper pin, and then use a puller to pull out the blockage, grind the edge of the blockage so that there are no burrs and sharp places, and grind it thoroughly to prevent abnormal noise from the slewing bearing after assembly.

5. Clean the slewing bearing

Clean the workpiece, use compressed air to blow off the processing residues (fine iron grinding, grinding) on ​​the inner and outer rings of the slewing bearing and in the mounting holes, then use kerosene or diesel to clean the workpiece, and then load it into the assembly area.

6. Slewing bearing with rolling elements

Use a block of wood to padded a ferrule that is blocked to make it fixed and cannot be rotated, and then insert another ferrule (the large one is suspended with a crane), so that the positions of the inner and outer ring channels are in a parallel state, and put in a few grains first.

The rolling elements are dispersed in a circle, support the non-clogging ferrule, and then rotate the non-clogging ring to install other rolling elements and spacers according to the number required in the drawing, so that they are evenly distributed in the raceway, check the remaining gaps in the raceway, and use a thick Or thin spacer block to adjust the gap, the gap should not be greater than the length of one spacer block, to prevent the slewing bearing from being stuck due to the overturning of the spacer block, and then install the plug and taper pin, both ends of the taper pin should be lower than the plane.

7. Detection

Check all drawing size requirements, check whether the rotation is flexible, whether there is noise, axial clearance, radial clearance, end face runout, tooth runout, inner and outer diameter runout, finished product height, starting torque, etc.

8. Oil filling seal

After passing the test, put it into the grease nipple, then inject grease as required, install the seal and stick the interface, type, and finally demagnetize to check the appearance.

9. Packaging

The finished product is coated with anti-rust oil, first wrap the first layer with a transparent oil-repellent film, then wrap the second layer with kraft paper, and then wrap the third layer with plastic wrapping film or according to customer requirements, and finally label the product and pack it.