single row cross roller Slewing Bearing for Long Screw Engineering Drill

With the rapid development of hydraulic transmission technology and the wide use of low speed and high torque motor in recent years, it is possible to use slewing bearing on the power turntable of large diameter drilling machine. Slewing bearing is a kind of device used to support the platform of main engine slewing and to complete the space slewing operation. According to its structural, it can be divided into column type and rotary plate type. The rotary type also can be divided into supporting roller and rolling bearing type. As a device for transferring power and driving drill pipe, the rotary table mainly adopts bevel gear transmission, which has complex structure and high manufacturing cost. In order to meet the construction needs of low speed, human torque and large diameter, as well as the design requirements of bearing alternating loads under various complex conditions, large special rotary bearing with large diameter should be selected to increase the reduction ratio of rotary transmission device. If according to the conventional mode design, is bound to cause the turntable structure more complex, huge volume, weight increase, cost is expensive, increase the gear, box processing, and bearing manufacturing workload, but also make the turntable installation and demolition difficulty, is not conducive to the development of the series of turntable. Large caliber drill as a large machinery, there are also many risks in operation, such as the new drill or stop drilling for a long time,drilling rig should open 2 speed operation at least 20 min, When the drill is not used for a long time, each exposed part should be coated with lubricating grease to prevent rust and so on.

Slewing Ring Bearings——Packaging Details:
Step 1: Covered with the anti-rust oil
Step 2: wrapped with the plastic film;
Step 3: Packed with Kraft paper and professional belts;
Step 4: Put into wooden box to avoid the rust or the moist;
Remark: Normally, plastic film+ Kraft +belt+ wooden box, but customized packing available

INSTALLATION OF Longwei transmission SLEWING BEARINGS

Preparation:
Make sure that the model is correct and slewing bearing isn’t damaged during transportation.
2. Check the appearance and rotational state of the bearing, such as rotational precision clearance, rotating flexibility, seals position, lubrication grease etc.
3. The installation datum plane and bracket installing plane should be clean, grease, burr, paint and other foreign body should be wiped off.

Installation:

1. The screws in the installing plane should be fit with the mounting holes in the slewing bearing
2. The slewing bearing has a soft zone marked with an “s” on the upper surface, when installing the bearing, it is important to ensure that this area is placed in a non-load or infrequent load zone.
3. When the bearing is placed on the supporting frame work it is important to check the interface between these two surfaces. This check should be carried out with the insertion of feel gauges between the two surfaces. If a gap should exist then it is recommended to plane/resurface the effective area so as to remove the gap.
4. Install slewing bearing with high strength screws, and choose appropriate strength bolts. All bolts are required to be tightened evenly. The sequence of this tightening process is shown in Pic. Welding of bearing is not allowed, in the event of welding any adjacent parts, heat transfer shall be avoided so as to cause the bearing to become deformed or change the hardness.
5. After installation, the bearing should be rotated to check for smooth operation and any emission of unusual noise. If either of the aforementioned are noted, then the bearing should be adjusted to eliminate them. The teeth of the largest run-out are coated with green paint.

FAQ:

Q: Are longweiBEARINGS trading company or manufacturer?
A: Longwei Transmission is a professional manufacturer for slewing bearings, thin section bearings, ball bearings and rolling bearings

Q: How do Longwei Transmission Slewing Bearing control quality of their bearing?
A: Longwei Transmission BEARINGS has established strict quality control systems, all the products and services has passed ISO9001-2008 Quality Certificate and third party such as CCS, LR,ABS,BV

Q: What is the MOQ?
A: MOQ is 1pc, pls message us for detailed information.

Q: How about the package for Longwei Transmission Slewing Bearing?
A: Standard Industrial packing in general condition (Plastic tube+ professional plastic belts+ plywood case). Accept design package when OEM.

Q: How long is the production time?
A: It takes about 7-40 days, depends on the model and quantity.

Q: How about the shipping?
A: We can arrange the shipment or you may have your own forwarder.

Q: Is sample available?
A: Yes, sample order is acceptable.

Q: Can we use our own LOGO or design on bearings?
A: Yes. OEM is acceptable for Longwei Transmission Slewing Bearing. We can design as per your requirements and use your own LOGO and package design.

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