231.21.0775.013 Four Point Contact Ball Bearing Tower Crane Marking Car Hoist Road Machinery Backhoe Loader Gantry Crane

• Customization: Available
• Standard or Nonstandard: Standard
• Feature: High Speed, Vacuum, Antimagnetic, Heat-Resistant
• Model NO.: 231.21.0775.013
• Sealing Gland: Sealed On Both Sides
• Rolling-Element Number: Single-Row
• Roller Type: Deep Groove Raceway
• Material: Bearing Steel
• Type: External Gear
• Craft: Grinding
• Precision: P5/P4/P2
• Weight: 53.5kg
• Delivery Period: 40 Days
• Isolation Block: Plastic
• Heat Treatment: Surface Hardening
• Warranty: 1 Year
• Transport Package: Wooden Box
• Specification: 635*838.8*56
• Trademark: LYDZC
• Origin: Luoyang, China
• HS Code: 84821020
• Production Capacity: 3000pieces/Year

Product Description

 
      Problems needing attention in metallographic analysis of bearing materials
(1) Multi-scale structure of bearing materials: atomic and molecular level, dislocation and other crystal defect level, grain microstructure level, meso-structure level, macro-structure level, etc.
(2) The inhomogeneity of the microstructure of the turntable bearing material: the actual microstructure often has the inhomogeneity of geometric morphology, chemical composition and micro-performance (such as microhardness and local electrochemical degree);
(3) The directionality of bearing materials' microstructure: including anisotropy of grain morphology, directionality of macrostructure, crystallographic selection orientation, directionality of macroscopic properties of materials, etc., which should be analyzed and characterized respectively;
(4) The variability of bearing materials' microstructure: chemical composition changes, phase transition and microstructure evolution caused by external factors and time changes, etc. may all lead to the changes of materials' microstructure. Therefore, besides the qualitative and quantitative analysis of static microstructure, bearings should pay attention to whether it is necessary to study the solid phase transition process, microstructure evolution dynamics and evolution mechanism.                                           
                The above slewing bearing can also be divided into three different types.
                              #1  Slewing bearing with no gear
                              #2  Slewing bearing with external gear
                              #3  Slewing bearing with internal gear
 

Turntable bearing is the most basic and standard mechanical part in mechanical manufacturing technology, and it is also the most widely used coupling and rotating technology in mechanical industry. It has the advantages of simple structure, reliable quality, high precision, convenient assembly, easy disassembly and assembly of parts, good reusability and so on. Bearing parts are connected by bolts, that is, two connected bodies are closely attached and have enough axial pre-tightening force (i.e. axial tensile stress) by the torque exerted by "tightening", so as to ensure the reliable connection and normal operation of the connected parts. When assembling, the clamping force must be large enough to ensure that the connected parts do not move relative to each other during the working process. In addition, the applied clamping force must ensure that the bolts and connected parts will not be damaged or plastically deformed during assembly and service.

Turntable bearing is the most basic and standard mechanical part in mechanical manufacturing technology, and it is also the most widely used coupling and rotating technology in mechanical industry. It has the advantages of simple structure, reliable quality, high precision, convenient assembly, easy disassembly and assembly of parts, good reusability and so on. Bearing parts are connected by bolts, that is, two connected bodies are closely attached and have enough axial pre-tightening force (i.e. axial tensile stress) by the torque exerted by "tightening", so as to ensure the reliable connection and normal operation of the connected parts. When assembling, the clamping force must be large enough to ensure that the connected parts do not move relative to each other during the working process. In addition, the applied clamping force must ensure that the bolts and connected parts will not be damaged or plastically deformed during assembly and service


   Product structure 


                                   231.21.0775.013


  Live shooting

                                                                           
                                                                231.21.0775.013


    detailed product parameters
   RKS.061.20.0944 bearing basic introduction: 1. the standard of this bearing is slightly different from the number of each brand, which belongs to the external tooth type four-point contact ball rotary support turntable bearing. the material is usually determined according to the customer host, and the material is different in different use occasions. generally, 50Mn or 42CrMo carbon steel or bearing steel is used. The quenching hardness can reach HRC58-64, and the quenching and tempering hardness is 229-269HB, which can ensure the bearing life and rotation accuracy. 2. The bearing has a thickness of 56mm, an outer diameter of 1046.7mm, an inner diameter of 872mm, and a thickness of 56 mm. It is a medium-sized or large-sized bearing with a weight of 77kg. It is a bearing with a large market manufactured by LYDZC according to domestic and foreign standards. 3. RKS.061.20.0944 model bearings produced by LYDZC are in the range of P4A (UP)-P5, which are mostly used as main engine accessories with large bearing requirements, and can ensure the main engine to show good operation. 4. The rolling bodies adopt steel balls and balls, and there is no cage or isolation block between the rolling bodies, which increases the load of the bearing and makes the bearing run more smoothly. 5. The bearings are positioned by inner and outer ring mounting holes, which is convenient for installation and disassembly.


                                   

 

Main dimensions				Fixing holes					Gear teeth			Tooth force				Basic load rating		curves		Designation
De	Dm	Di	Fe	He	Ne	Fi	hi	Ni	D	m	z	Norm Tooth	Max tooth fouce	Mass	Fig N°	Axial dyn.C	Axial Stat.Co	Race ways(r)	Bolt(b)
mm												kN	kN	Kg		kN	kN
503.3	414	342	455	M12	20	368	14	24	495	5	99	17	31	31	A	169	560	1r	1b	RKS.061.20.0414
640.3	544	472	585	M12	28	498	14	32	630	6	105	23	42	43	A	188	740	2r	2b	RKS.061.20.0544
742.3	644	572	685	M12	32	598	14	36	732	6	122	23	42	52	A	200	880	3r	3b	RKS.061.20.0644
838.1	744	672	785	M12	36	698	14	40	828	6	138	23	42	59	A	211	1010	4r	4b	RKS.061.20.0744
950.1	844	772	885	M12	36	798	14	40	936	8	117	32	57	71	A	222	1150	5r	5b	RKS.061.20.0844
1046.1	944	872	985	M12	40	898	14	44	1032	8	129	32	57	77	A	231	1280	6r	6b	RKS.061.20.0944
1198.1	1094	1022	1135	M12	44	1048	14	48	1184	8	148	32	57	91	A	244	1490	7r	7b	RKS.061.20.1094
1338	1204	1119	1257	16	45	1151	16	45	1310	10	131	49	88	135	B	371	1943	8r	8b	RKS.061.25.1204
1448	1314	1229	1367	16	50	1261	16	50	1420	10	142	49	88	147	B	383	2124	9r	9b	RKS.061.25.1314
1558	1424	1339	1477	16	54	1371	16	54	1530	10	153	49	88	159	B	395	2304	10r	10b	RKS.061.25.1424
1668	1534	1449	1587	16	60	1481	16	60	1640	10	164	49	88	171	B	406	2485	11r	11b	RKS.061.25.1534
1791	1644	1536	1708	22	54	1580	22	54	1760	10	176	49	88	211	B	416	2666	12r	12b	RKS.061.25.1644
1901	1754	1646	1818	22	60	1690	22	60	1870	10	187	49	88	225	B	424	2847	13r	13b	RKS.061.25.1754
2073.4	1904	1796	1968	22	64	1840	22	64	2030	14	145	69	124	270	B	571	4048	14r	14b	RKS.061.25.1904

Main dimensions			Fixing holes						Gear teeth			Tooth force		Mass	Fig N°	Basic load rating		curves*		Designation
De	Dm	Di	Fe	he	Ne	Fi	hi	Ni	D	m	Z	Norm. Tooth	Max Tooth force	Mass		Axial dyn. C	Axial stat. Co	Raceways (r)	Bolt (b)
mm									mm			kN	kN	kg		kN	kN
486	414	325	460	14	325	460	M12	24	335	5	67	18	34	31	C	169	560	1r	1b	RKS.062.20.0414
616	544	444	590	14	444	590	M12	32	456	6	76	25	45	42	C	188	740	2r	2b	RKS.062.20.0544
716	644	546	690	14	546	690	M12	36	558	6	93	25	45	50	C	200	880	3r	3b	RKS.062.20.0644
816	744	648	790	14	648	790	M12	40	660	6	110	25	45	58	C	211	1010	4r	4b	RKS.062.20.0744
916	844	736	890	14	736	890	M12	40	752	8	94	33	60	69	C	222	1150	5r	5b	RKS.062.20.0844
1016	944	840	990	14	840	990	M12	44	856	8	107	33	60	76	C	231	1280	6r	6b	RKS.062.20.0944
1166	1094	984	1140	14	984	1140	M12	48	1000	8	125	33	60	91	C	244	1490	7r	7b	RKS.062.20.1094
1289	1204	1072	1257	16	1072	1257	16	45	1080	10	108	59	106	145	D	371	1943	8r	8b	RKS.062.25.1204
1399	1314	1182	1367	16	1182	1367	16	50	1190	10	119	59	106	159	D	383	2124	9r	9b	RKS.062.25.1314
1509	1424	1292	1477	16	1292	1477	16	54	1300	10	130	59	106	172	D	395	2304	10r	10b	RKS.062.25.1424
1619	1534	1402	1587	16	1402	1587	16	60	1410	10	141	59	106	186	D	406	2485	11r	11b	RKS.062.25.1534
1752	1644	1495	1708	22	1495	1708	22	54	1500	10	150	59	106	236	D	416	2666	12r	12b	RKS.062.25.1644
1862	1754	1605	1818	22	1605	1818	22	60	1610	10	161	59	106	252	D	424	2847	13r	13b	RKS.062.25.1754
2012	1904	1729	1968	22	1729	1968	22	64	1736	14	124	82	147	299	D	571	4080	14r	14b	RKS.062.30.1904

 

 

In the past 20 years, we have focused on bearing manufacturing, R&D and export, and never set foot in any field unrelated to the bearing industry Because of its focus, it has established the professional brand of Luoyang East Axis in China. Because of the focus, it has established the popularity and influence of Luoyang East Axis in the global quality buyer community. Over the past 20 years, we have focused on serving buyers and bearing host customers. Because of concentration, I have a deep understanding of the purchasing habits of professional buyers and the criteria for selecting suppliers. Because of our focus, we strive to design, develop and manufacture bearings that are symmetrical with the needs of professional buyers. In the past 20 years, I have focused on R&D and production, hoping to continuously improve my competitiveness Because of dedication, Luoyang East Axis of China knows how to satisfy your requirement of maximizing the use value and minimizing the price of bearings. Because of focus, East Axis of Luoyang, China is concerned about not only how to make buyers satisfied with our products, but also how to help your company develop better.

LYDZ turntable bearing is a kind of large bearing with special structure, which can bear large axial load, radial load and overturning moment at the same time, and has many functions such as support, rotation, transmission and fixing. Under normal circumstances, turntable bearings are equipped with mounting holes, lubricating oil and sealing devices, which can meet the different needs of various hosts working under different working conditions; On the other hand, the turntable bearing itself has the characteristics of compact structure, convenient guiding rotation, simple installation and easy maintenance, etc., and is widely used in large-scale rotating devices such as hoisting and transportation machinery, mining machines, construction engineering machinery, port machinery, wind power generation, medical equipment, radar and missile launcher. The single-row four-point contact ball-type turntable bearing is composed of two races, which is compact in structure and light in weight. The steel balls are in four-point contact with the arc raceway, and can bear axial force, radial force and tilting moment at the same time. Rotary conveyors, welding operators, small and medium-sized cranes, excavators and other construction machinery can be selected.