Single Row Cross Roller Slewing Bearing for Excavators and Cranes

The ZZ single row cross roller slewing bearing provides a reliable rotation solution for excavators, truck cranes, drilling rigs, and tunneling machines. Its rollers are arranged in a 90° cross pattern, allowing the bearing to handle axial, radial, and tilting moment loads simultaneously. This design ensures high rigidity, stable rotation, and minimal deformation, making it ideal for heavy machinery operating under demanding conditions.

Description

High-Precision Cross Roller Design

The ZZ single row cross roller slewing bearing provides exceptional stability and precision. Its cylindrical rollers arranged at 90° in a cross pattern increase rigidity and allow the bearing to handle axial, radial, and tilting moment loads simultaneously. This makes it suitable for excavators, cranes, drilling rigs, and aerial work platforms where precise rotation and load-bearing capacity are critical.

		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	D₃ (mm)	d₁ (mm)	H₁ (mm)	h (mm)	b (mm)	m (mm)	d_a (mm)	z	d_a (mm)	z
11.25.500	1	602	398	75	566	434	18	M16	32	20	4	498	502	65	10	60	5 6	629 628.8	123 102	367 368.4	74 62
11.25.560	2	662	458	75	626	494	18	M16	32	20	4	558	562	65	10	60	5 6	689 688.8	135 112	427 428.4	86 72
11.25.630	3	732	528	75	696	564	18	M16	32	24	4	628	632	65	10	60	6 8	772.8 774.4	126 94	494.4 491.2	83 62
11.25.710	4	812	608	75	776	644	18	M16	32	24	4	708	712	65	10	60	6 8	850.8 854.4	139 104	572.4 571.2	96 72
11.28.800	5	922	678	82	878	722	22	M20	40	30	6	798	802	72	10	65	8 10	966.4 968	118 94	635.2 634	80 64
11.28.900	6	1022	778	82	978	822	22	M20	40	30	6	898	902	72	10	65	8 10	1062.4 1068	130 104	739.2 734	93 74
11.28.1000	7	1122	878	82	1078	922	22	M20	40	36	6	998	1002	72	10	65	10 12	1188 1185.6	116 96	824 820.8	83 69
11.28.1120	8	1242	998	82	1198	1042	22	M20	40	36	6	1118	1122	72	10	65	10 12	1298 1305.6	127 106	944 940.8	95 79
11.32.1250	9	1390	1110	91	1337	1163	26	M24	48	40	5	1248	1252	81	10	75	12 14	1449.6 1453.2	118 101	1048.8 1041.6	88 75
11.32.1400	10	1540	1260	91	1487	1313	26	M24	48	40	5	1398	1402	81	10	75	12 14	1605.6 1607.2	131 112	1192.8 1195.6	100 86
11.32.1600	11	1740	1460	91	1687	1513	26	M24	48	45	5	1598	1602	81	10	75	14 16	1817.2 1820.8	127 111	1391.6 1382.4	100 87
11.32.1800	12	1940	1660	91	1887	1713	26	M24	48	45	5	1798	1802	81	10	75	14 16	2013.2 2012.8	141 123	1573.6 1574.4	113 99
11.40.2000	13	2178	1825	112	2110	1891	33	M30	60	48	8	1997	2003	100	12	90	16 18	2268.8 2264.4	139 123	1734.4 1735.2	109 97
11.40.2240	14	2418	2065	112	2350	2131	33	M30	60	48	8	2237	2243	100	12	90	16 18	2492.8 2498.4	153 136	1990.4 1987.2	125 111
11.40.2500	15	2678	2325	112	2610	2391	33	M30	60	56	8	2497	2503	100	12	90	18 20	2768.4 2776	151 136	2239.2 2228	125 112
11.40.2800	16	2978	2625	112	2910	2691	33	M30	60	56	8	2797	2803	100	12	90	18 20	3074.4 3076	168 151	2527.2 2528	141 127
11.50.3150	17	3376	2922	134	3286	3014	45	M42	84	56	8	3147	3153	122	12	110	20 22	3476 3471.6	171 155	2828 2824.8	142 129
11.50.3550	18	3776	3322	134	3686	3414	45	M42	84	56	8	3547	3553	122	12	110	20 22	3876 3889.6	191 174	3228 3220.8	162 147
11.50.4000	19	4226	3772	134	4136	3864	45	M42	84	60	10	3997	4003	122	12	110	22 25	4329.6 4345	194 171	3660.8 3660	167 147
11.50.4500	20	4726	4272	134	4636	4364	45	M42	84	60	10	4497	4503	122	12	110	22 25	4835.6 4845	217 191	4166.8 4160	190 167

Compact and Strong

The compact design fits into tight spaces without sacrificing strength. High stiffness reduces deformation under heavy loads or sudden shocks. Machinery such as truck cranes, shield tunneling machines, and construction excavators operates more efficiently thanks to the bearing’s stable performance.

Durable Materials and Advanced Processing

ZZ manufactures this cross roller bearing from premium alloy steel. Through forging, quenching, and precision grinding, the bearing achieves long fatigue life and excellent wear resistance. Optimized raceway geometry ensures even load distribution, reducing stress points and extending service life.

Sealing and Maintenance

The bearing features high-quality sealing systems to block dust, mud, and moisture. Integrated lubrication channels make maintenance easy and fast. Smooth rotation continues over long cycles, reducing downtime. This reliability makes the ZZ slewing bearing ideal for continuous operation in construction, mining, tunneling, and port equipment.

Wide Applications

The cross roller bearing supports excavators, cranes, aerial platforms, shield tunneling machines, and port handling equipment. It also suits wind turbine yaw and pitch systems, where precision and stability are crucial. Engineers trust the bearing to deliver accurate rotation, consistent positioning, and long-term durability.

ZZ Brand Reliability

ZZ slewing bearings meet international quality standards. Strict quality control and decades of manufacturing experience ensure consistent performance. Clients worldwide rely on ZZ single row cross roller slewing bearings for long service life, precision, and reduced maintenance costs in heavy machinery applications.

Summary

The ZZ single row cross roller slewing bearing combines precision, durability, and compact design. Its cross roller layout supports multiple load types, while high-quality materials, sealing systems, and easy maintenance guarantee long-term performance. It offers a dependable solution for excavators, cranes, drilling rigs, tunneling machines, and wind energy systems.