Crawler Crane Slewing Ring

Luoyang Xinqianglian Slewing Bearing Co., Ltd.  ( Hereinafter referred to as the LYXQL) founded in 2003, is located in the ancient capital of nine dynasties Luoyang in Henan province. LYXQL is a national key high-tech enterprises and become a GEM listing company successfully on July 13,2020 (stock code "300850").

LYXQL is a leader in the manufacturers of large size slewing bearings, based on Luoyang in China, developing and producing slewing bearings and precision bearings for the most varied of application areas. The slewing bearings are widely used as components in  crawler cranes.

Crawler crane is a kind of self-propelled crane for high-rise building construction. It is a boom rotating crane that uses the crawler to travel. The crawler has a large grounding area, good passability, strong adaptability, and can walk with load, which is suitable for hoisting operations on construction sites. It can perform various operations such as excavation, rammed earth, and piling. However, due to the slow walking speed, other vehicles are required for long-distance transfer of the site.

Through the slewing bearing mounted on the chassis, the full weight of the turntable can be transferred to the chassis, which is equipped with power units, transmission systems, hoists, operating mechanisms, counterweights and hangars. The power unit can make the turntable rotate 360° through the slewing mechanism. The slewing bearing is composed of the upper and lower rolling discs and the rolling elements (balls, rollers) in between, which can transfer the full weight of the turntable to the chassis and ensure the free rotation of the turntable.

Crawler crane slewing ring bearing-structure type
1.Four contact ball slewing bearings
2.Cross roller slewing bearings
3.Double row ball slewing bearings
4.Triple row roller slewing bearings
5.Ball and roller combined slewing bearings;

Crawler crane slewing ring ------Technical Data:
1.Inner ring and outer ring material: 42CrMo, 50Mn
2.Steel ball or roller material: Gcr15, Gcr15 SiMn, 304 Stainless steel, 440 Stainless steel
3. Precision: P0. P6. P5.
4. Outside diameter: 1000~17000mm
5. Cage/retainer: Nylon or Steel Cage
6: Seal: NBR, Oil resistant rubber,Viton,Skeleton oil seal

Crawler crane slewing bearing------Surface treatment:
1: black surface treatment
2: Surface sandblasting and painting
3: Surface chrome plating
4: Surface spray zinc treatment
5: Surface phosphating treatment
6: Dacromet treatment

Crawler crane slewing ring------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,

Crawler crane slewing ring bearing--- Advantages:
1. Good quality and competitive price
2. Trial order accepted
3. ISO certified company
4. OEM and ODM accepted
5. Can design and produce non-standard models according to the special requirements of customers.
6.Can provide BV, LR,DNV,CCS, NK,KR, GL,ABS certificate

Crawler crane Slewing Ring- Seal
The sealing of knuckle boom crane slewing bearing is mainly to prevent the filled grease from leaking out, and also to prevent external dust, impurities and moisture from entering the inside of the bearing and affecting the normal operation of the bearing.

Since most of the slewing bearings work under heavy loads and low speeds, the sealing form of the bearings adopts two structures: rubber seal ring seal and labyrinth seal. The rubber sealing ring itself has a simple structure, small space occupation and reliable sealing performance. The disadvantage is that it is prone to early aging under high temperature conditions and loss of airtightness. Therefore, under high temperature conditions, the slewing bearing should adopt a labyrinth seal. In addition, the material of the sealing ring under high temperature is high temperature resistant fluoro rubber.

Crawler crane slewing ring bearing- Maintain
1. The slewing bearing should be greased regularly. According to different types of slewing bearings, the specific grease filling time is as follows: the ball type is filled with grease every 100 hours of operation; the roller type is filled with grease every 50 hours of operation .

2. The sundries on the surface of the slewing ring should be removed frequently during use, and the sealing strip of the slewing ring should be checked for aging, cracking, damage or separation. If one of these conditions occurs, the sealing strip should be replaced in time to prevent debris from entering the raceway and the loss of grease.

3.Pay close attention to the operation of the slewing ring during use. If you find that the noise, impact, or power suddenly increases, you should stop the machine immediately for inspection until all the faults are eliminated, and disassemble and inspect if necessary.