Four Point Contact Ball Slewing Bearing (External Gear)

PMK Four Point Contact Ball Slewing Bearings with External Gear provide a strong and efficient solution for rotary motion systems where external drive transmission is required. They combine high load capacity, accurate rotation, and simple integration for large rotary assemblies.

Key benefits

Integrated external gear for robust drive engagement.
Capable of carrying combined radial, axial, and moment loads.
Compact, rigid structure for heavy-duty rotation.
Smooth running with low noise and vibration.
Long operating life with consistent performance.

Applications

Cranes, excavators, and construction machinery.
Wind turbines and rotating platforms.
Industrial turntables and automation systems.
Heavy machinery and transport systems requiring precision rotation.

Request Quote (RFQ)

Specifications

Boundary dimensions (mm)			Mount dimensions (mm)						Structure dimensions (mm)						Gear constants (mm)					Designations	Basic load ratings (kN) Coa	Mass (kg)
d	D	H	D₁	D₂	n₁	n₂	φ1	φ2	D₃	d₁	H₁	h	n₃	φ3	m	Da	Z	b	x	Designations	Basic load ratings (kN) Coa	Mass (kg)
470	694	77	630	500	18	18	M16	18	567.5	564.5	64	13	6	M10×1	6	696	114	60	0	D178794	1570	93.1
674	853	70	825	709	34	23	20	M20	764	768	59	10	2	ZG1/8in	7	889	125	50	0	1787/674G2	1830	89
674	853	70	825	709	34	24	18	18	764	768	59	10	2	ZG1/8in	7	889	125	50	0	1787/674G2K	1830	88.6
710	894	67	845	744	8	8	M10	M10	798	806	58	9	3	M10×1	6	924	152	55	0	1787/710G2	1790	107
	894	67	875	760	8	12	M10	M12	798	806	58	9	3	M10×1	6	924	152	55	0	1787/710G2K	1790	107
	894	67	865	744	20	20	13	13	798	806	58	9	4	M10×1	6	924	152	55	0	1787/710G2K1	1790	107
800	1050	90	1012	838	30	30	20	20	923	927	76	16	3	M10×1	6	1092	180	60	0	1787/800G	2150	217
800	1050	90	1012	838	30	30	20	20	923	927	76	16	3	M10×1	6	1092	180	60	0	1787/800GK	2150	217
1060	1335	109	1295	1105	24	24	M20	22	1198	1202	100	9	4	M8×1	10	1388	138	80	-0.6	1787/1060G	5010	407
1075	1365	120	1310	1130	36	36	26	26	1218	1222	105	15	4	M8×1	8	1424	176	90	0	1787/1075	4630	463
	1365	130	1310	1130	36	36	24	24	1218	1222	105	10	-	-	10	1420	140	120	0	1787/1075K	4630	550
	1365	120	1310	1130	36	36	24	24	1218	1222	105	15	4	M10×1	10	1424.91	138	90	+1.4	1787/1075G2	4630	463
	1365	120	1310	1130	36	36	M24	26	1218	1222	105	15	4	M8×1	8	1424	176	90	0	1787/1075G2K	4630	463
1330	1475	82.4	1510	1362	24	24	18.5	18.5	1439	1445	70	12.4	6	M10x1	9	1584	174	70	0	1787/1330G2	3530	280
1700	1945	120	1900	1750	24	24	M18	21	1825	1845	110	10	4	M10x1	5	1970	392	35	0	1787/1700	4050	516
2052	100	1980	1780	24	24	20	M18	1878	1882	90	10	4	M14x1.5	-	5	2080	414	50	0	1789/1700GM	5510	678
2650	2885	100	2850	2700	48	48	M20	M20	2777	2781	80	10	6	ZG1/4in	12	2949.6	244	80	0	1787/2650G2	9130	751
2922	3376	174	3286	3014	56	56	45	45	3147.5	3152.5	162	12	8	M10x1	20	3480	171	150	+0.5	011.75.3150.**	23800	2800
2922	3376	174	3286	3014	56	56	45	45	3147.5	3152.5	162	12	8	M10x1	22	3476	155	150	+0.5	012.75.3150.**	23800	2800
3322	3776	174	3686	3414	56	56	45	45	3547.5	3552.5	162	12	8	M10x1	20	3880	191	150	+0.5	011.75.3550.**	26900	3200
3322	3776	174	3686	3414	56	56	45	45	3547.5	3552.5	162	12	8	M10x1	22	3894	174	150	+0.5	012.75.3550.**	26900	3200
3772	4226	174	4136	3864	60	60	45	45	3997.5	4002.5	162	12	10	M10x1	22	4334	194	150	+0.5	011.75.4000.**	30200	3600
3772	4226	174	4136	3864	60	60	45	45	3997.5	4002.5	162	12	10	M10x1	25	4350	171	150	+0.5	012.75.4000.*	30200	3600
4272	4726	174	4636	4364	60	60	45	45	4497.5	4502.5	162	12	10	M10x1	22	4840	217	150	+0.5	011.75.4500.**	34100	4000
4272	4726	174	4636	4364	60	60	45	45	4497.5	4502.5	162	12	10	M10x1	25	4850	191	150	+0.5	012.75.4500.**	34100	4000