Double-row Ball Slewing Bearing

Description:

Double-row Ball Slewing bearing

LYNBC double-row ball slewing bearing can carry axial loads, tilting moment and radial loads at the same time. The top balls mainly carry the axial load and positive tilting moment. The drop balls take the opposite tilting moment. This is the reason why the loading capacity of the double row ball slewing bearing is larger than the four-point contact ball slewing bearing; However, the frictional ratio is larger than the latter.

LYNBC double-row ball slewing bearing consists of inner ring, outer ring, balls in double rows, spacers, sealing device, etc. Because the top balls mainly take the axial load and tilting moment, the size of top balls are larger than the drop balls. In order to accommodate the various working condition at different axial load, tilting moments and axial load, the angle of contact would be adjusted accordingly.

The rings structure can be divided into two types, integral type and split type. Generally, the integral type maintains a stronger rigidity. The split type is more convenient to adjust; the two segregate rings are fastened by bolts before delivery.

LYNBC double-row slewing bearing has cages(or spacers) among the balls. Only when large loading is requested, would the full ball type be applied. Loading capacity for full ball type is definitely larger, However, the increased friction generated by this design allows for the balls to be easily scratched.

The double-row slewing bearing is mainly for the working conditions when carrying axial load, larger tilting moment, and where the mounting place is limited in radial direction. This structure has smallest sensitive in mounting precision and deformation in axial and radial direction.

The basic structures of LYNBC double-row ball slewing bearing as below:

Without gear

External gear

Internal gear

▲ The design’s of all these slewing bearing are based on standard structures; LYNBC can design and manufacture many other similar structures in accordance to the special and particular requirements of their customers’. If our customer’s have specific requests then the customer should identify the structure, and mounting dimensions that are required. Please contact the LYNBC Technical Center if you need any assistance in this area.

Parameters

Designation			Boundary Dimension			Mounting Hole Size				Gear Data							Basic load ratings	Mass
No Gear	External Gear	Internal Gear	D	d	H	D1	D2	n	Φ	m	Da	Z	da	Z	b	x	Coa(10KN)	(Kg)
020.25.500	021.25.500	023.25.500	616	384	106	580	420	20	18	5	645	126	355	72	60	0.5	121	100
	022.25.500	024.25.500	616	384	106	580	420	20	18	6	648	105	348	59	60	0.5	121	100
020.25.560	021.25.560	023.25.560	676	444	106	640	480	20	18	5	705	138	415	84	60	0.5	134	115
	022.25.560	024.25.560	676	444	106	640	480	20	18	6	708	115	408	69	60	0.5	134	115
020.25.630	021.25.630	023.25.630	746	514	106	710	550	24	18	6	792	129	480	81	60	0.5	153	130
	022.25.630	024.25.630	746	514	106	710	550	24	18	8	792	96	472	60	60	0.5	153	130
020.25.710	021.25.710	023.25.710	826	594	106	790	630	24	18	6	864	141	558	94	60	0.5	173	140
	022.25.710	024.25.710	826	594	106	790	630	24	18	8	864	105	552	70	60	0.5	173	140
020.30.800	021.30.800	023.30.800	942	658	124	898	702	30	22	8	984	120	616	78	80	0.5	230	200
	022.30.800	024.30.800	942	658	124	898	702	30	22	10	990	96	610	62	80	0.5	230	200
020.30.900	021.30.900	023.30.900	1042	758	124	998	802	30	22	8	1088	133	712	90	80	0.5	258	250
	022.30.900	024.30.900	1042	758	124	998	802	30	22	10	1090	106	710	72	80	0.5	258	250
020.30.1000	021.30.1000	023.30.1000	1142	858	124	1098	902	36	22	10	1200	117	810	82	80	0.5	286	300
	022.30.1000	024.30.1000	1142	858	124	1098	902	36	22	12	1200	97	792	67	80	0.5	286	300
020.30.1120	021.30.1120	023.30.1120	1262	978	124	1218	1022	36	22	10	1320	129	920	93	80	0.5	321	340
	022.30.1120	024.30.1120	1262	978	124	1218	1022	36	22	12	1320	107	912	77	80	0.5	321	340
020.40.1250	021.40.1250	023.40.1250	1426	1074	160	1374	1126	40	26	12	1500	122	1008	85	90	0.5	482	580
	022.40.1250	024.40.1250	1426	1074	160	1374	1126	40	26	14	1498	104	1008	73	90	0.5	482	580
020.40.1400	021.40.1400	023.40.1400	1576	1224	160	1524	1272	40	26	12	1644	134	1152	97	90	0.5	543	650
	022.40.1400	024.40.1400	1576	1224	160	1524	1272	40	26	14	1652	115	1148	83	90	0.5	543	650
020.40.1600	021.40.1600	023.40.1600	1776	1424	160	1724	1476	45	26	14	1848	129	1344	97	90	0.5	620	750
	022.40.1600	024.40.1600	1776	1424	160	1724	1476	45	26	16	1856	113	1344	85	90	0.5	620	750
020.40.1800	021.40.1800	023.40.1800	1976	1624	160	1924	1676	45	26	14	2058	144	1540	111	90	0.5	692	820
	022.40.1800	024.40.1800	1976	1624	160	1924	1676	45	26	16	2064	126	1536	97	90	0.5	692	820
020.50.2000	021.50.2000	023.50.2000	2215	1785	190	2149	1851	48	33	16	2304	141	1696	107	120	0.5	987	1150
	022.50.2000	024.50.2000	2215	1785	190	2149	1851	48	33	18	2304	125	1692	95	120	0.5	987	1150
020.50.2240	021.50.2240	023.50.2240	2455	2025	190	2389	2091	48	33	16	2544	156	1936	122	120	0.5	1110	1500
	022.50.2240	024.50.2240	2455	2025	190	2389	2091	48	33	18	2556	139	1926	108	120	0.5	1110	1500
020.50.2500	021.50.2500	023.50.2500	2715	2285	190	2649	2351	56	33	18	2804	153	2196	123	120	0.5	1110	1500
	022.50.2500	024.50.2500	2715	2285	190	2649	2351	56	33	20	2820	138	2180	110	120	0.5	1110	1500
020.50.2800	021.50.2800	023.50.2800	3015	2585	190	2949	2651	56	33	18	3114	170	2484	139	120	0.5	1390	1900
	022.50.2800	024.50.2800	3015	2585	190	2949	2651	56	33	20	3120	153	2480	125	120	0.5	1390	1900
020.60.3150	020.60.3150	020.60.3150	3428	2872	226	3338	2962	56	45	20	3540	174	2760	139	150	0.5	1870	3300
	020.60.3150	020.60.3150	3428	2872	226	3338	2962	56	45	22	3542	158	2750	126	150	0.5	1870	3300
020.60.3550	021.60.3550	023.60.3550	3828	3272	226	3738	3362	56	45	20	3940	194	3160	159	150	0.5	2110	3700
	022.60.3550	024.60.3550	3828	3272	226	3738	3362	56	45	22	3938	176	3168	145	150	0.5	2110	3700
020.60.4000	021.60.4000	023.60.4000	4278	3722	226	4188	3812	60	45	22	4400	197	3608	165	150	0.5	2370	4200
	022.60.4000	024.60.4000	4278	3722	226	4188	3812	60	45	25	4400	173	3600	145	150	0.5	2370	4200
020.60.4500	021.60.4500	023.60.4500	4778	4222	226	4688	4312	60	45	22	4884	219	4114	188	150	0.5	2670	4700
	022.60.4500	024.60.4500	4778	4222	226	4688	4312	60	45	25	4900	193	4100	165	150	0.5	2670	4700
No Gear	External Gear	Internal Gear	D	d	H	D1	D2	n	Φ	m	Da	Z	da	Z	b	x	Coa(10KN)	(Kg)
Designation			Boundary Dimension			Mounting Hole Size				Gear Data							Basic load ratings	Mass