ZZ Double Row Ball Slewing Bearing for Excavators

The ZZ double row ball slewing bearing is designed for heavy-duty engineering machinery where higher load capacity and stability are required. Featuring two rows of precision steel balls, this bearing can handle combined axial, radial, and tilting moment loads simultaneously, making it ideal for excavators, truck cranes, tower cranes, and concrete pump trucks.

Description

The ZZ double row ball slewing bearing is engineered for heavy-duty applications requiring higher load capacity and stability. With two rows of precision steel balls, it can simultaneously bear substantial axial, radial, and overturning loads. This makes it ideal for excavators, truck cranes, tower cranes, and concrete pump trucks where safety and reliability are critical.

ZZ double row slewing bearings feature high-strength alloy steel construction, advanced heat treatment, and precision-ground raceways. The dual-row design distributes loads more evenly, reducing wear and extending service life. Optional gear teeth configurations allow seamless integration with hydraulic or electric drive systems.

Sealed designs protect against dust, mud, and water, while internal lubrication ensures smooth operation with minimal maintenance. The robust structure maintains stability even under shock loads common in mining, construction, or port machinery.

		Dimensions			Fixing Holes						Structure Size			Gear data		External gear data		Internal gear data
Code	Curva	D (mm)	d (mm)	H (mm)	D₁ (mm)	D₂ (mm)	d_n1 d_n2 (mm)	d_m1 d_m2 (mm)	L (mm)	n	n₁	H₁ (mm)	h (mm)	b (mm)	m (mm)	d_a (mm)	z	d_a (mm)	z
02.25.500	1	616	384	106	580	420	18	M16	32	20	4	96	26	60	5 6	644 646.8	126 105	357 350.4	72 59
02.25.560	2	676	444	106	640	480	18	M16	32	20	4	96	26	60	5 6	704 706.8	138 115	417 410.4	84 69
02.25.630	3	746	514	106	710	550	18	M16	32	24	4	96	26	60	6 8	790.8 790.4	129 96	482.4 475.2	81 60
02.25.710	4	826	594	106	790	630	18	M16	32	24	4	96	26	60	6 8	862.8 862.4	141 105	560.4 555.2	94 70
02.30.800	5	942	658	124	898	702	22	M20	40	30	6	114	29	80	8 10	982.4 988	120 96	619.2 614	78 62
02.30.900	6	1042	758	124	998	802	22	M20	40	30	6	114	29	80	8 10	1086.4 1088	133 106	715.2 714	90 72
02.30.1000	7	1142	858	124	1098	902	22	M20	40	36	6	114	29	80	10 12	1198 1197.6	117 97	814 796.8	82 67
02.30.1120	8	1262	978	124	1218	1022	22	M20	40	36	6	114	29	80	10 12	1318 1317.6	129 107	924 916.8	93 77
02.40.1250	9	1426	1074	160	1374	1126	26	M24	48	40	5	150	39	90	12 14	1497.6 1495.2	122 104	1012.8 1013.6	85 73
02.40.1400	10	1576	1224	160	1524	1276	26	M24	48	40	5	150	39	90	12 14	1641.6 1649.2	134 115	1156.8 1153.6	97 83
02.40.1600	11	1776	1424	160	1724	1476	26	M24	48	45	5	150	39	90	14 16	1845.2 1852.8	129 113	1349.6 1350.4	97 85
02.40.1800	12	1976	1624	160	1924	1676	26	M24	48	45	5	150	39	90	14 16	2055.2 2060.8	144 126	1545.6 1542.4	111 97
02.50.2000	13	2215	1785	190	2149	1851	33	M30	60	48	8	178	47	120	16 18	2300.8 2300.4	141 125	1702.4 1699.2	107 95
02.50.2240	14	2455	2025	190	2389	2091	33	M30	60	48	8	178	47	120	16 18	2540.8 2552.4	156 139	1942.4 1933.2	122 108
02.50.2500	15	2715	2285	190	2649	2351	33	M30	60	56	8	178	47	120	18 20	2804.4 2816	153 138	2203.2 2188	123 110
02.50.2800	16	3015	2585	190	2949	2651	33	M30	60	56	8	178	47	120	18 20	3110.4 3116	170 153	2491.2 2488	139 125
02.60.3150	17	3428	2872	226	3338	2962	45	M42	84	56	8	214	56	150	20 22	3536 3537.6	174 158	2768 2758.8	139 126
02.60.3550	18	3828	3272	226	3738	3362	45	M42	84	56	8	214	56	150	20 22	3936 3933.6	194 176	3168 3176.8	159 145
02.60.4000	19	4278	3722	226	4188	3812	45	M42	84	60	10	214	56	150	22 25	4395.6 4395	197 173	3616.8 3610	165 145
02.60.4500	20	4778	4222	226	4688	4312	45	M42	84	60	10	214	56	150	22 25	4879.6 4895	219 193	4122.8 4110	188 165

Widely used in aerial work platforms, rotary drilling rigs, and shield tunneling machines, these bearings deliver precision, durability, and confidence in every rotation. ISO-certified production and rigorous quality control guarantee ZZ bearings meet global standards for engineering machinery.