Please see details for  slewing ring bearing
230.21.0475.013 (Type 21/520.0)
if you need more details, please feel free to contact us for designing and producing

1. Introduction of LYHY slewing bearings
LYHY is a professional manufacturer in slewing ring bearings since 1993. We can also design and make other standard and non-standard ball bearings, roller bearings and precision bearings as per customer's different technical requirements.
Slewing bearing is also called slewing ring, slewing ring bearing, turntable bearing, and rotary bearing.
Slewing ring bearing is a bearing that able to bear axial load, radial load and overturning torque. Under normal circumstances, slewing rings have their own mounting holes, lubricant holes and seal holes, to meet the different needs of the various host working under the various conditions;
On the other hand, slewing bearing itself has characteristics of compact structure, guide rotating convenient, easy to install and maintaining easily.
LYHY slewing ring bearings are usually used for low revolution while shaking and strained with an enormous axial force, moment and in some parts with radial force simultaneously.
Consequently the requirements for loading are stricter than ordinary bearings. If the selection of the slewing ring bearing has been wrong it will cause a great damage. Hence it is necessary to evaluate the exact forces acting on the slewing ring bearing and to select the suitable slewing ring bearings.

2. Structure
2.1 Slewing ring bearings have different types as per different structures:
Single row ball slewing bearings
Double row ball slewing bearings
Crossed roller slewing bearings
Triple row roller slewing bearings
Flange slewing bearings
2.2 The above slewing ring bearings can also be divided into three different types as per different transmissions:
Slewing ring bearings with no gear
Slewing ring bearings with external gear
Slewing ring bearings with internal gear



Detailed description of these types slewing bearings

Single row four point contact ball slewing bearings
     This kind of slewing bearings can support high dynamic loads, transmitting axial and radial forces simultaneously as well as the resulting tilting moments. Applications of this kind of bearings are hoisting, mechanical handling and general mechanical engineering etc.
Single row cross roller slewing bearings
     This kind of bearings can support combinations of large radial force, medium axial force and tilting moment with small or zero clearance. Main applications of this kind of bearings are hoisting and mechanical handling and general mechanical engineering etc.
Double row different ball diameter slewing bearings
     This kind of bearings can support high static loads with simple structures. They are mainly used in situations with variation load position and direction and continuously rotating. Main applications of this kind of bearings are deck hoisting, mining and material handling etc.
Triple row cylindrical roller slewing bearings
     This kind of bearings has high load carrying capacity. Under same loads, this kind of bearings has much smaller diameters which can make the installation much compact, as different kinds of loads are supported by different races and rollers. Main applications of this kind of bearings are hoisting, mechanical handling, mining and materials handling, offshore technology and general mechanical engineering etc.
Roller/ball combination slewing bearings
     This kind of bearings can support high axial load and low tilting moments. Usually they are large diameter slewing bearings. Applications of this kind of bearings are mining and materials handling etc.



3. Features:
Slewing ring bearings have more features: Compact structure, reliable guide, simple installation, and easily maintenance

4. Application:
Slewing ring bearings can be widely used in lifting & transport machinery, mining machinery, construction machinery, port hoisting machinery, port oil transfer equipment, onshore and offshore crane, excavator, concrete machine, paper machine, plastic and rubber machine, weave machine, steel plant, electronic power plant, wind power generator, other construction and industry machines or equipments and other large rotary device.



5. Slewing Ring Bearings------Technical Data:
Material: 42CrMo, 50Mn, or other material customers require.
Precision: P0. P6. P5.
Outside diameter: 200~9500mm
Cage/retainer: Nylon, aluminum, steel, brass or others customers require
Gear type: non-geared, internal gear and external gear, gear hardened

All LYHY slewing ring bearings are forged rings with material steel 50Mn or 42CrMo, slewing rings are machined by CNC lathe, slew bearings raceway are quenched via medium-frequency hardening with hardness 55-60HRC, turntable bearings are drilled holes by CNC drilling machine, slew gears are machined by hobbing machine with gear quenched if required, swing bearings then are grinded by grinding machine with higher precision.



6. LYHY Slewing Bearing Packing 
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,

Transportation:
All LYHY slewing ring bearings can be usually delivered timely, usual production time is 15-50 days based on different slew bearings diameters, sometimes slew rings will be in stock.
Slewing bearings can be offered different delivery terms, such as EXW, FOB, CIF, DDU and so on.
Also, slewing rings can be transported by different transport ways, by express (such as DHL, TNT, UPS, FEDEX and so on), by air, by sea, by truck, by railway and so on.




Flanged slewing bearing with external gear:
231.20.0400.013 (Type 21/520.1)
231.20.0500.013 (Type 21/650.1)
231.20.0600.013 (Type 21/750.1)
231.20.0700.013 (Type 21/850.1)
231.20.0800.013 (Type 21/950.1)
231.20.0900.013 (Type 21/1050.1)
231.20.1000.013 (Type 21/1200.1)

231.20.0400.503 (Type 21/520.1)
231.20.0500.503 (Type 21/650.1)
231.20.0600.503 (Type 21/750.1)
231.20.0700.503 (Type 21/850.1)
231.20.0800.503 (Type 21/950.1)
231.20.0900.503 (Type 21/1050.1)
231.20.1000.503 (Type 21/1200.1)

231.21.0475.013 (Type 21/520.1)
231.21.0575.013 (Type 21/650.1)
231.21.0675.013 (Type 21/750.1)
231.21.0775.013 (Type 21/850.1)
231.21.0875.013 (Type 21/950.1)
231.21.0975.013 (Type 21/1050.1)
231.21.1075.013 (Type 21/1200.1)

281.30.0900.013 (Type 110/1100.1)
281.30.1000.013 (Type 110/1200.1)
281.30.1100.013 (Type 110/1300.1)
281.30.1200.013 (Type 110/1400.1)
281.30.1300.013 (Type 110/1500.1)
281.30.1400.013 (Type 110/1600.1)

281.30.0975.013 (Type 110/1100.1)
281.30.1075.013 (Type 110/1200.1)
281.30.1175.013 (Type 110/1300.1)
281.30.1275.013 (Type 110/1400.1)
281.30.1375.013 (Type 110/1500.1)
281.30.1475.013 (Type 110/1600.1)



Flanged slewing bearing: Bearing ungeared:
230.20.0400.013 (Type 21/520.0)
230.20.0500.013 (Type 21/650.0)
230.20.0600.013 (Type 21/750.0)
230.20.0700.013 (Type 21/850.0)
230.20.0800.013 (Type 21/950.0)
230.20.0900.013 (Type 21/1050.0)
230.20.1000.013 (Type 21/1200.0)

230.20.0400.503 (Type 21/520.0)
230.20.0500.503 (Type 21/650.0)
230.20.0600.503 (Type 21/750.0)
230.20.0700.503 (Type 21/850.0)
230.20.0800.503 (Type 21/950.0)
230.20.0900.503 (Type 21/1050.0)
230.20.1000.503 (Type 21/1200.0)

230.21.0475.013 (Type 21/520.0)
230.21.0575.013 (Type 21/650.0)
230.21.0675.013 (Type 21/750.0)
230.21.0775.013 (Type 21/850.0)
230.21.0875.013 (Type 21/950.0)
230.21.0975.013 (Type 21/1050.0)
230.21.1075.013 (Type 21/1200.0)

280.30.0900.013 (Type 110/1100.0)
280.30.1000.013 (Type 110/1200.0)
280.30.1100.013 (Type 110/1300.0)
280.30.1200.013 (Type 110/1400.0)
280.30.1300.013 (Type 110/1500.0)
280.30.1400.013 (Type 110/1600.0)

280.30.0975.013 (Type 110/1100.0)
280.30.1075.013 (Type 110/1200.0)
280.30.1175.013 (Type 110/1300.0)
280.30.1275.013 (Type 110/1400.0)
280.30.1375.013 (Type 110/1500.0)
280.30.1475.013 (Type 110/1600.0)



Flanged slewing bearing with external gear:
232.20.0400.013 (Type 21/520.2)
232.20.0500.013 (Type 21/650.2)
232.20.0600.013 (Type 21/750.2)
232.20.0700.013 (Type 21/850.2)
232.20.0800.013 (Type 21/950.2)
232.20.0900.013 (Type 21/1050.2)
232.20.1000.013 (Type 21/1200.2)

232.20.0400.503 (Type 21/520.2)
232.20.0500.503 (Type 21/650.2)
232.20.0600.503 (Type 21/750.2)
232.20.0700.503 (Type 21/850.2)
232.20.0800.503 (Type 21/950.2)
232.20.0900.503 (Type 21/1050.2)
232.20.1000.503 (Type 21/1200.2)

232.21.0475.013 (Type 21/520.2)
232.21.0575.013 (Type 21/650.2)
232.21.0675.013 (Type 21/750.2)
232.21.0775.013 (Type 21/850.2)
232.21.0875.013 (Type 21/950.2)
232.21.0975.013 (Type 21/1050.2)
232.21.1075.013 (Type 21/1200.2)

282.30.0900.013 (Type 110/1100.2)
282.30.1000.013 (Type 110/1200.2)
282.30.1100.013 (Type 110/1300.2)
282.30.1200.013 (Type 110/1400.2)
282.30.1300.013 (Type 110/1500.2)
282.30.1400.013 (Type 110/1600.2)

282.30.0975.013 (Type 110/1100.2)
282.30.1075.013 (Type 110/1200.2)
282.30.1175.013 (Type 110/1300.2)
282.30.1275.013 (Type 110/1400.2)
282.30.1375.013 (Type 110/1500.2)
282.30.1475.013 (Type 110/1600.2)