Four Point Contact Ball Slewing Bearing for Excavator and Crane

Four Point Contact Ball Slewing Bearing for Excavator and Crane

Four point contact ball slewing bearing is mainly composed of an inner ring, outer ring, single-row steel balls, cage (or spacer), sealing device, and other parts. The inner ring and outer ring of the four-point contact ball slewing bearing has integral and split structures. The rigidity of the integral ferrule is relatively muscular, and the split type is easy to adjust. The split structure uses bolts to connect the two split rings before the product leaves the factory. Four point contact ball slewing bearings generally have cages (or spacers).The full-filled ball structure is only used when the load is relatively large. The full-filled four point contact ball slewing bearing has a significant bearing capacity but a sizeable frictional resistance. Friction can also easily cause scratches on the surface layer of the steel ball. The basic structure of the four point contact ball slewing bearing/slewing ring: with or without gears, external gears, and internal gears, with high static load capacity. Four point contact ball slewing bearings are particularly versatile and are widely used in cranes, lifting equipment, and other engineering machinery.

▍Four Point Contact Ball Slewing Bearing Specifications:

Four point contact ball slewing bearing is suitable for construction machinery, such as rotary conveyors, welding robots/manipulators, small and medium cranes, and excavators.

• Material: 42CrMo, 50Mn
• Seal type: Nitrile rubber
• Features: Four-point contact internal tooth / external tooth / no tooth
• Inner diameter size: 100-8000mm
• Outer diameter: 200-10000mm
• Warranty: 12 months
• Rolling body: steel ball
• Normalizing hardness: 187HB-241HB
• Quenched and tempered hardness: 229HB-269HB
• Raceway quenching hardness: HRC 55-62

▍Structure of Four Point Contact Ball Slewing Bearing

	1. Inner Ring
	2. Outer Ring
	3. Seal
	4. Spacer
	5. Ball/Roller

▍Types of Four Point Contact Ball Slewing Bearing

Four Point Contact Ball Slewing Bearing with No Gear	Four Point Contact Ball Slewing Bearing with External Gear	Four Point Contact Ball Slewing Bearing with Internal Gear

▍Four Point Contact Ball Slewing Bearing Dimensions:

(1) External Gear Type Four Point Contact Ball Slewing Bearing Model Parameters

Model	Dimensions							Installation size						Tooth parameters				Load	Weight
	De	de	di	Di	He	Hi	Ht	Fe	Ne	he	Fi	Ni	hi	m	Z	x·m	Dp
	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[-]		[mm]	[-]		[mm]	[-]	[mm]	[mm]	[kN]	[kg]
1B12-E-0181	244	182	180	125	25	25	25	214	24	11	144.5	20	11	2	120	–	240	–	–
1B17-E-0235	318	236	234	169	37	34	45	275	20	13.5	195	20	M12	3	104	–	312	–	–
1B20-E-0289	379	290	288	210	40	40	45	335	24	13.5	240	24	13.5	4	92	–	372	–	–
1B20-E-0314	404	315.5	312.5	242	45.5	45.5	56	355	20	M12	268	20	14	5	79	–	395	30	23
1B20-E-0414	504	415.5	412.5	342	45.5	45.5	56	455	20	M12	368	24	14	5	99	–	495	30	32
1B20-E-0544	640.8	545.5	542.5	472	45.5	45.5	56	585	28	M12	498	32	14	6	105	–	630	36	43
1B20-E-0644	742.8	645.5	642.5	572	45.5	45.5	56	685	32	M12	598	36	14	6	122	–	732	36	52
1B20-E-0744	838.8	745.5	742.5	672	45.5	45.5	56	785	36	M12	698	40	14	6	138	–	828	36	58
1B20-E-0844	950.4	845.5	842.5	772	45.5	45.5	56	885	36	M12	798	40	14	8	117	–	936	48	71
1B20-E-0944	1046.4	945.5	942.5	872	45.5	45.5	56	985	40	M12	898	44	14	8	129	–	1032	48	77
1B20-E-1094	1198.4	1095.5	1092.5	1022	45.5	45.5	56	1135	44	M12	1048	48	14	8	148	–	1184	48	90
1B25-E-0455	590.4	454	456	355	71	54	80	516	18	M20	395	18	22	8	72	–	576	77.2	74
1B25-E-0555	694.4	554	556	455	71	54	80	616	20	M20	495	20	22	8	85	–	680	77.2	93
1B25-E-0655	798.4	654	656	555	71	54	80	716	24	M20	595	24	22	8	98	–	784	77.2	111
1B25-E-0755	898	754	756	655	71	54	80	816	24	M20	695	24	22	9	98	–	882	86.8	125
1B25-E-0855	997	854	856	755	71	54	80	916	28	M20	795	28	22	9	109	–	981	86.8	145
1B25-E-0955	1096	954	956	855	71	54	80	1016	30	M20	895	30	22	9	120	–	1080	86.8	155
1B25-E-1055	1198	1054	1056	955	71	54	80	1116	30	M20	995	30	22	10	118	–	1180	96.6	171
1B25-E-1155	1298	1154	1156	1055	71	54	80	1216	36	M20	1095	36	22	10	128	–	1280	96.6	186
1B25-E-1255	1398	1254	1256	1155	71	54	80	1316	42	M20	1195	42	22	10	138	–	1380	96.6	201
1B25-E-1355	1498	1354	1356	1255	71	54	80	1416	42	M20	1295	42	22	10	148	–	1480	96.6	218
1B25-E-1455	1598	1454	1456	1355	71	54	80	1516	48	M20	1395	48	22	10	158	–	1580	96.6	233
1B25-E-1204	1338	1207.5	1200.5	1119	58	58	68	1257	45	16	1151	45	16	10	131	5	1310	92.8	154
1B25-E-1314	1448	1317.5	1310.5	1229	58	58	68	1367	50	16	1261	50	16	10	142	5	1420	92.8	166
1B25-E-1424	1558	1427.5	1420.5	1339	58	58	68	1477	54	16	1371	54	16	10	153	5	1530	92.8	180
1B25-E-1534	1668	1537.5	1530.5	1449	58	58	68	1587	60	16	1481	60	16	10	164	5	1640	92.8	193
1B25-E-1644	1791	1647.5	1640.5	1536	58	58	68	1708	54	22	1580	54	22	10	176	6.5	1760	92.8	237
1B25-E-1754	1901	1757.5	1750.5	1646	58	58	68	1818	60	22	1690	60	22	10	187	6.5	1870	92.8	257
1B25-E-1904	2073	1907.5	1900.5	1796	58	58	68	1968	64	22	18