The slewing bearing is also called the slewing bearing, and some people also call it: rotating bearing, slewing bearing. The English names are: slewing bearing, slewing ring bearing, turntable bearing, slewing ring. Slewing bearings are widely used in the real industry. They are called “joints of machines”. They are mechanical places that require relative rotational movement between two objects, but also need to bear axial force, radial force, and tilting moment at the same time. An important transmission component necessary. With the rapid development of the machinery industry, slewing bearings have been widely used in marine equipment, engineering machinery, light industry machinery, metallurgical machinery, machinery, industrial machinery and other industries.
Single row four point contact ball slewing bearing is normal type, and have non-geared, internal gear and external gear. It is composed of two seat rings , which design in compact structure and light weight, steel ball contact with the circular raceway at four points.
The slewing bearing main used inner and outer ring and rolling elements to assembly. It can bear both Axial load, Radial load and Tilting moment.
We are make the teeth quenching, zinc plating and blackening for slewing bearing, painting is also accept. XCMG, SANY is our customer, we have a cooperation for the slewing bearing.
Note
- n1 is the nos of lubricating holes.Oil cup M10×1JB/T7940.1~JB/T7940.2.The Oil nipple’s location can be change according to the user’s application.
2. n-φcan change to tapped hole,the diameter of tapped hole is M,depth is 2M.
3. The tangential tooth force in the form is the max tooth force,the nominal tangential tooth force is 1/2 of the max one.
4. “K” is addendum reduction coefficient.
Longwei transmission Slewing Bearing Co.,Ltd. is a slewing bearing manufacturer specializing in standard and non-standard slewing bearing.Over the years, we supplied high quality product & good service to every user and gain good credit.We have strict quality control system in our own factory,meanwhile, we have passed ISO9001-2008
Gear precision grade OF slewing bearing :
Slewing bearing its gear precision grade should be between 7 to 11, which determines the smoothness of the slewing bearing drive, load distribution uniformity and transmission accuracy. The higher the slewing bearing gear precision, the more intensive the mesh tooth surface contact spots, so that the noise value is reduced, the smoothness of operation improved.
The contact and bending strength of gears under ultimate and fatigue loads were calculated and verified according to ISO6336-1:2006, ISO6336-2:2006 and ISO6336-3:2006 respectively. Sf is 1.48 and the gear mesh clearance is adjusted for the highest point of radial run out of the slewing bearing gear pitch circle. The minimum tooth clearance is typically 0.03 to 0.04x modulus, and the gear mesh clearance of the pinion gears on the entire circumference needs to be re-checked after final fastening of the slewing bearing .
Problem handling in the use of slewing bearings
Single-row four-point contact ball slewing ring internal ball machining accuracy and internal raceway machining accuracy is not high, or there are quality defects and lack of lubricating oil in the raceway roller and spacer collision, directly affect the smooth operation of the slewing ring and noise, so when checking the slewing ring defects, sometimes by replacing the ball to reduce the frequency of failure.
Due to the gear under load after a long working time, there will be a small piece of metal or strip of metal near the pitch line, pitting or gnawing metal chips off, the formation of pitting or teeth. The slewing bearing tooth surface pitting with the increase in working time and expanding so that the slewing bearing mesh tooth damage, tower crane rotary noise and impact increases, the cycle of impact down the metal particles and accelerate the wear of the slewing ring tooth surface, forming a vicious cycle. In addition, the manufacturing and assembly of the starter motor in the slewing ring mechanism has its own defects to produce impact jitter, and the engagement process of the drive wheel with the slewing bearing is unstable, which also increases the frequency of jitter and reverberation noise decibels.
If the weld quality is not up to standard, the weld defect needs to be reworked and rewelded. In the repair welding repair will not only produce new welding stress and the flatness of the machined mounting surface will also have a great impact, at the same time the welding current generated in the slewing bearing through the internal rolling body and slewing ring raceway will also cause some damage. In addition, assembly errors in manufacturing assembly, field installation of the pin threading and bolt preload can also produce abnormal noise or chatter if the requirements are not met.
FAQ
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2.What are the shipping methods?
Ocean shipment to the port close to your city; Air shipment to the airport close to your company; Door to door service by international express.
3.When can I get the price?
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4.You are a trader or a manufacturer?
We are an industry and trade integration business, our factory located on Xuzhou City.
5.How about the payment terms?
We usually accept T/T or L/Cat sight . other terms also could be negotiated.
6.What is your minimum order?
It depends on what you are buying. Normally, our minimum order is 1pcs.
7.What is your delivery time?
If there are any parts in stock , our delivery time is only 3-7 days. If our standard model,the delivery time is around 25 days,if non-standard model,the delivery time is 38~45 days.
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