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)	dn1 dn2 (mm)	dm1 dm2 (mm)	L (mm)	n	n1	D3 (mm)	d1 (mm)	H1 (mm)	h (mm)	b (mm)	m (mm)	da (mm)	z	da (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.

The post Single Row Cross Roller Slewing Bearing for Excavators and Cranes appeared first on ZZ.

Type	Slewing Bearing
Name	Excavator Parts
Material	50mn/42crmo
Gear position	Internal Gear Only
Q&t	HRC55-62
Working temperature	-30℃- +70℃
Service	OEM Customized Services
Delivery Metdods	DHL Fedex EMS UPS or By Sea
In stock	Sufficient
Note	Delivery in time during covid-19

Before installing the excavator slewing bearing, carefully check whether there is any bump damage during transportation. If there is, there will be an abnormal noise. If this happens, please contact our after-sales service department in time. In addition, it is also necessary to consider whether the operation is invalid due to the cold weather. If the grease in the raceway is viscous and can be operated after applying force, it can be used normally. Operation is not flexible after installation. It may be that the mounting surface of the main engine and the mounting surface of the slewing bearing do not cooperate well, resulting in that the axial clearance of the slewing bearing after installation cannot compensate for the deformation of the slewing bearing, the slewing bearing is in a state of negative clearance, and the rolling elements running in the raceway are sometimes accompanied by abnormal noise. , or the large and small gears are not meshed well, or the large and small gears are stuck with foreign objects.

The excavator slewing bearing is used very frequently, bears comprehensive loads, and can bear large axial and radial loads and overturning moments at the same time.

Improvement measures for large swing of excavator
1) Appropriately reduce the bearing clearance, especially the axial clearance.
2) Control the shape of the bearing raceway, especially the ovality.
3) Strictly control the surface hardness and quenching depth of the bearing raceway to prevent the surface hardness from being too low and the depth being too shallow.
4) Appropriately increase the quenching and tempering hardness of the bearing base material.
5) Other factors.

The post swing bearing excavator Slewing Bearing With Internal Gear appeared first on ZZ.

The excavator slewing bearing is a key component of the excavator. It is located between the upper structure and the lower structure and is responsible for providing support and achieving rotation. It usually consists of large rolling bearings that allow the excavator to rotate 360 degrees.

ZZ Slewing Bearings focus on customized processing of excavator slewing bearings, with complete models. Quickly check the price and contact the engineer!

The post Excavator Slewing Bearing appeared first on ZZ.

slewing bearing for excavator

The slewing device is composed of a turntable, a slewing bearing and a slewing mechanism. The outer race of the slewing bearing is connected with the turntable by bolts, the inner race with teeth is connected with the underframe by bolts, and rolling bodies are arranged between the inner and outer races. The vertical load, horizontal load and overturning moment of the excavator working device acting on the turntable are transmitted to the underframe through the outer race, rolling element and inner race of the slewing bearing. The housing of the slewing mechanism is fixed on the turntable, and a pinion gear is used to mesh with the ring gear on the inner race of the slewing bearing. The pinion can rotate on its own axis or revolve around the centerline of the turntable. When the turning mechanism is working, the turntable will rotate relative to the chassis.

We pay attention to quality inspection of every production and purchase process.

Type	Slewing Bearing
Name	Excavator Parts
Material	50mn/42crmo
Gear position	Internal Gear Only
Q&t	HRC55-62
Working temperature	-30℃- +70℃
Service	OEM Customized Services
Delivery Metdods	DHL Fedex EMS UPS or By Sea
In stock	Sufficient
Note	Delivery in time during covid-19

Products Show

Technology processing

The ZZ slewing ring has a strong reputation for civilian or military applications. Our precision is obtained by a specific process of grinding. Our design office proposes specific solutions for all types of environments. Capacity, low torque, stiffness and high rotating speed are our main characteristics.

The post slewing ring for excavator china manufacturer slewing bearing appeared first on ZZ.

You can select online or contact technical engineering to help you.

Products Show

Technology processing

No.		Ring Dimension				Dimension of Mounting hole									Gear Parameter						N.W kg
						Through				Thread
		D	dn	H	h	Du	Dn	φ	n	Du	Dn	d1	T	n	z	m	d	da	L	X
		mm				mm				mm						mm
QN.400.16             QN.400.16A		482	320	60	10	448	352	15	12	448	352	M14	28	12	86     75	3.5     4	301   300	297.5 296	44	0.5	42     43
QN.450.16             QN□450.16A		532	370	60	10	498	402	15	12	498	402	M14	28	12	100    87	3.5      4	350   348	346.5 344	44	0.5	50     51
QN.500.16             QN.500.16A		582	420	60	10	548	452	15	14	548	452	M14	28	14	100    79	4       5	400   395	396   390	44	0.5	57      57
QN.560.16             QN.560.16A		642	480	60	10	608	512	15	14	608	512	M14	28	14	115    91	4       5	460   455	456   450	44	0.5	64     65
QN.560.20             QN.560.20A		656	468	70	10	618	502	17	14	618	502	M16	30	14	111    88	4       5	444   440	440   435	50	0.5	76     77
QN.630.20             QN.630.20A		726	538	70	10	688	572	17	16	688	572	M16	30	16	129   102	4       5	516   510	512   505	50	0.5	84     86
QN.710.20             QN.710.20A		806	618	70	10	768	652	17	18	768	652	M16	30	18	118    98	5       6	590   588	585   582	50	0.5	97     97
QN.800.20             QN.800.20A		896	708	70	10	858	742	17	20	858	742	M16	30	20	113    84	6       8	678   672	672   664	50	0.5	110   111
QN.800.25             QN.800.25A		908	694	78	10	864	736	22	18	864	736	M20	36	18	110    82	6       8	660   656	654   648	58	0.5	142   142
QN.900.25             QN.900.25A		1008	794	78	10	964	836	22	20	964	836	M20	36	20	94     75	8      10	752   750	744   740	58	0.5	163   162
QN□1000.25             QN□1000.25A		1108	894	78	10	1064	936	22	24	1064	936	M20	36	24	107    85	8      10	856   850	848   840	58	0.5	178   179
QN.1000.32             QN.1000.32A		1124	880	90	10	1074	926	24	24	1074	926	M22	40	24	105    84	8      10	840   840	832   830	70	0.5	230   227
QN.1120.32             QN.1120.32A		1244	1000	90	10	1194	1046	24	28	1194	1046	M22	40	28	95     79	10     12	950   948	940   936	70	0.5	263   262
QN.1250.32             QN.1250.32A		1374	1130	90	10	1324	1176	24	32	1324	1176	M22	40	32	108    90	10     12	1080  1080	1070  1068	70	0.5	294   290
QN.1400.32             QN.1400.32A		1524	1280	90	10	1474	1326	24	36	1474	1326	M22	40	36	102    87	12     14	1224  1218	1212   1204	70	0.5	333   336
QN.1250.40             QN.1250.40A		1394	1110	102	12	1336	1164	26	32	1336	1164	M24	45	32	106    88	10     12	1060  1056	1050  1044	80	0.5	388   388
QN.1400.40             QN.1400.40A		1544	1260	102	12	1486	1314	26	36	1486	1314	M24	45	36	100    86	12     14	1200   1204	1188  1190	80	0.5	444    434
QN.1600.40            QN.1600.40A		1744	1460	102	12	1686	1514	26	40	1686	1514	M24	45	40	117   100	12     14	1404  1400	1392  1386	80	0.5	509   511
QN.1800.40             QN.1800.40A		1944	1660	102	12	1886	1714	26	44	1886	1714	M24	45	44	114    99	14     16	1596 1584	1582 1568	80	0.5	576   591
QN.1600.50             QN.1600.50A		1766	1438	124	12	1704	1496	30	40	1704	1496	M27	50	40	115    98	12     14	1380 1372	1368  1358	100	0.5	714   723
QN.1800.50            QN.1800.50A		1966	1638	124	12	1904	1696	30	44	1904	1696	M27	50	44	113    98	14     16	1582 1568	1568 1552	100	0.5	794   818
QN.2000.50             QN.2000.50A		2166	1842	124	12	2104	1896	30	48	2104	1896	M27	50	48	111    98	16     18	1776 1764	1760 1746	100	0.5	891   913
QN.2240.50             QN.2240.50A		2406	2078	124	12	2344	2136	30	54	2344	2136	M27	50	54	125    111	16     18	2000 1998	1984 1980	100	0.5	1044 1041
QN.2500.50            QN.2500.50A		2666	2342	124	12	2604	2396	30	60	2604	2396	M27	50	60	126    113	18     20	2268  2260	2250  2240	100	0.5	1132  1148
QN.2500.60             QN.2500.60A		2696	2308	150	14	2626	2374	33	60	2626	2374	M30	56	60	124    111	18     20	2232 2220	2214 2200	122	0.5	1621 1654
QN.2800.60             QN.2800.60A		2996	2608	150	14	2926	2674	33	66	2926	2674	M30	56	60	140   126	18     20	2520 2520	2502 2500	122	0.5	1871 1857
QN.3150.60            QN.3150.60A		3346	2958	150	14	3276	3024	33	72	3276	3024	M30	56	72	143   130	20     22	2860 2860	2840 2838	122	0.5	2144 2129
QN.3550.60             QN.3550.60A		3746	3358	150	14	3676	3424	33	78	3676	3424	M30	56	78	163   130	20     25	3260 3250	3240 3225	122	0.5	2425 2437
QN.4000.60             QN.4000.60A		4196	3808	150	14	4126	3874	33	80	4126	3874	M30	56	80	169   148	22     25	3718 3700	3696 3675	122	0.5	2683 2763

The post Internal Gear Slewing Ring For Shield Tunneling Machine appeared first on ZZ.

One of the primary contributions of slewing bearings to backhoe loaders is their rotation capability. The controlled rotation enables the backhoe arm to move horizontally, vertically, and in a full 360-degree circle, providing operators with the flexibility to reach various positions without repositioning the entire machine. This versatility makes backhoe loaders well-suited for a wide range of applications, including digging, trenching, lifting, and material loading on construction sites.

You can select online or contact technical engineering to help you.

The post Slewing Ring Bearing With External Gear For Backhoe Loader appeared first on ZZ.