Product Details

Single Row Four Point Contact Ball Internal Gear Flange Type Slewing Ring Bearing

The single-row four-point contact ball type internal gear flange slewing bearing is designed for heavy-duty industrial applications that demand precision, reliability, and high load-bearing capacity. The four-point contact ball configuration ensures optimal load distribution, minimizing stress on the bearing and providing smooth rotational motion under various load conditions. The internal gear design enables efficient torque transfer, making it ideal for applications requiring high torque in compact spaces.

The flange mounting system simplifies installation and enhances the bearing’s overall stability, allowing it to handle high axial, radial, and tilting moment loads. It is commonly used in cranes, excavators, and turntables, where durability and long-lasting performance are essential.

Specification

The single-row four-point contact ball type internal gear flange slewing bearing is a high-performance solution designed to meet the demanding requirements of various heavy-duty applications. This slewing bearing features a four-point contact ball arrangement, which ensures smooth, efficient rotation while distributing loads evenly across the bearing. The internal gear design enhances the rotational capability and allows for more efficient transfer of torque, making it ideal for machinery that requires consistent and reliable movement.

The flange structure of the bearing offers easy installation and excellent stability, allowing for quick assembly in equipment with limited space. The combination of a robust internal gear mechanism and the flange mounting system makes it particularly suitable for applications such as cranes, excavators, turntables, and other large-scale rotating equipment. The bearing is designed to handle high axial, radial, and tilting moment loads, ensuring it performs under even the most challenging operating conditions.

INA	Rothe Erde	TG	Da	D	d	H	nl	Φ1	m	z	Weigt kg
VLI200414N ZT			325	518	350	56	8	18	5	67	28.5
VLI 20 0414N ZT RL2			325	518	350	56	8	18	5	67	36.299999999999997
VLI200414N			325	518	350	56	8	18	5	67	27.5
	232.20.0400.013		326.5	518		56	8	18	5	67	27.1
	232.20.0400.503		326.5	518		56	16	18	5	67	26.9
	232.21.0475.013		326.5	517		56	8	18	5	67	27.1
		I.505.20.00.C	326.5	518		56	8	18	5	67	35.4
VLI200544N ZT			444	648		56	10	18	6	76	40.6
VLI200544N			444	648		56	10	18	6	76	38
	232.20.0500.013		445.2	648		56	10	18	6	76	36.9
	232.20.0500.503		445.2	648		56	20	18	6	76	36.700000000000003
	232.21.0575.013		445.2	647		56	10	18	6	76	36.9
		I.650.20.00.C	445.2	648		56	10	18	6	76	40.200000000000003
VLI200644N ZT			546	748		56	12	18	6	93	47.4
VLI200644N			546	748		56	12	18	6	93	45
	232.20.0600.013		547.2	748		56	12	18	6	93	43.7
	232.21.0675.013		547.2	747		56	24	18	6	93	43.4
	232.21.0675.013		547.2	747		56	12	18	6	93	43.7
		I.750.20.00.C	547.2	748		56	12	18	6	93	53.3
VLI200744N ZT			648	848		56	12	18	6	110	54
VLI200744N			648	848		56	12	18	6	110	51.5
	232.20.0700.013		649.2	848		56	12	18	6	110	51.1
	232.20.0700.503		649.2	848		56	24	18	6	110	50.8
	232.21.0775.013		649.2	847		56	12	18	6	110	51.1
		I.850.20.00.C	649.2	848		56	12	18	6	110	63.1
VLI200844N ZT			736	948		56	14	18	8	94	65.2
VL1200844N			736	948		56	14	18	8	94	61.5
	232.20.0800.013		737.6	948		56	14	18	8	94	61.6
	232.20.0800.503		737.6	948		56	28	18	8	94	61.3
	232.21.0875.013		737.6	947		56	14	18	8	94	61.6
		I.950.20.00.C	737.6	948		56	14	18	8	94	76.599999999999994
VLI300955N			810	1100		90	30	22	10	83	164
	282.30.0900.013		812	1100		90	30	22	10	83	159
	282.30.0975.013		812	1098		90	30	22	10	83	159
		I.1100.32.00.C	812	1100		90	30	12	10	83	159
VLI200944N ZT			840	1048		56	16	18	8	107	71
VLI200944N			840	1048		56	16	18	8	107	67.5
	232.20.0900.013		841.6	1048		56	16	18	8	107	65.8
	232.20.0900.503		841.6	1048		56	32	18	8	107	65.400000000000006
	232.21.0975.013		841.6	1047		56	16	18	8	107	65.8
		I.1050.20.00.C	841.6	1048		56	16	18	8	107	79.8
VLI301055N			910	1200		90	30	22	10	93	181
	282.30.1000.013		912	1200		90	30	22	10	93	176
	282.30.1075.013		912	1198		90	30	22	10	93	176
		I.1200.32.00.C	912	1200		90	30	12	10	93	176
VLI201094 N ZT			984	1198		56	16	,18	8	125	80
VLI201094N			984	1198		56	16	18	8	125	81.5
	232.20.1000.013		985.6	1198		56	16	18	8	125	80.7
	232.20.1000.503		985.6	1198		56	32	18	8	125	80.3
	232.21.1075.013		985.6	1197		56	16	18	8	125	80.7
		I.1200.20.00.C	985.6	1198		56	16	18	8	125	101
VLI301155N			1010	1300		90	36	22	10	103	198
	282.30.1100.013		1012	1300		90	36	22	10	103	192
	282.30.1175.013		1012	1298		90	36	22	10	103	192
		I.1300.32.00.C	1012	1300		90	36	12	10	103	192
VLI301255N			1110	1400		90	42	22	10	113	215
	282.30.1200.013		1112	1400		90	42	22	10	113	208
	282.30.1275.013		1112	1398		90	42	22	10	113	208
		I.1400.32.00.C	1112	1400		90	42	12	10	113	208
VLI301355N			1210	1500		90	42	22	10	123	233
	282.30.1300.013		1212	1500		90	42	22	10	123	226
	282.30.1375.013		1212	1498		90	42	22	10	123	226
		I.1500.32.00.C	1212	1500		90	42	12	10	123	226
	282.30.1400.013		1310	1600		90	48	22	10	133	243
	282.30.1475.013		1310	1598		90	48	22	10	133	243
		I.I600.32.00.C	1310	1600		90	48	12	10	133	243
VLI301455N			1310	1600		90	48	22	10	133	251

Frequently Asked Questions

Expert Insights and Reliable Solutions to Your Most Common Questions.

1. What types of slewing bearings does ZZ Slewing Bearing provide?

ZZ Slewing Bearing supplies a full range of slewing bearings to meet different industrial needs:

Single row four point contact slewing bearings Application: medium loads, precise rotation.
Double row ball bearings Application: higher radial and axial loads.
Cross roller bearings –Application: high rigidity, suitable for robots and machining centers.
Three row roller bearings – Application: extreme loads in heavy equipment.
Ball combine roller bearings –Application: precise rotational adjustment applications.
Customized bearings – tailored for specific equipment requirements.

2. How do I choose the right bearing for my application?

Typical selection parameter for ZZ clients:

Load type: axial, radial, and tilting moment.

Rotation RPM: ensures long service life.

Installation space & mounting dimensions: inner/outer ring diameter, bolt circle.

Precision & rigidity requirements: critical for cranes, excavators, and robots.

ZZ engineers provide professional selection guidance according to your equipment and drawings.

3. What materials does ZZ Slewing Bearing use for slewing bearings?

ZZ Slewing Bearing selects materials for strength, wear resistance, and long-term durability:

Slewing ring: 42CrMo, 50Mn, C45N, 40CrNiMo, C48E.

Special forging spare parts: carburized/hardened steels for gear teeth (20CrMnTi, 18CrNiMo7‑6).

Corrosion resistant: SS 304, 316L, duplex stainless steel.

Surface treatments: heat treatment, quenching, carburizing, induction hardening, and surface coating(Four-Layer Packing, Strong Anti-Rust Oil, Black Oxide Treatment, Jet Black Paint Finish, Hot-Dip Galvanizing (CGL), Electro-Galvanizing (EGL), Hot-Dip Galvanizing + Paint Finish)

4. How can ZZ Slewing Bearing achieve maximum service life?

Correct installation with flat surfaces.

Proper lubrication using grease.

Avoid overloading or shock loads over capacity.

Monitor operating conditions regularly to prevent debris entry.

5. What causes abnormal noise or vibration in bearings?

Typical factors observed by ZZ engineers:

Insufficient or incorrect lubrication.
(dust, metal particles) in raceways.
Rolling element or track damage.
Uneven mounting surfaces or misalignment.
Incorrect bolt torque(below grade 8.8) or preloading.

6. What are lead times and lifetime guarantee?

In-stock: 3–7 days.

Custom: 2–6 weeks depending on size, load, and precision.

Warranty: 1 year

Lifetime Free Spare Parts: Glue, seals, steel ball

7. Does ZZ provide installation and technical support?

Yes — ZZ Slewing Bearing offers:

Detailed installation manuals.

Online engineering support.

Guidance for lubrication, maintenance, and troubleshooting solution.

8. How do ZZ Slewing Bearing differ from competitors?

Full range of materials and heat treatments for various load conditions.

High precision and strict quality inspection standards.

Engineering support before and after delivery.

Customization to exact equipment requirements.

Proven performance in cranes, excavators, robotics, wind turbines, and heavy machinery etc.

ZZ Slewing Bearing (Shanghai) Co., Ltd

Leading Slew Drive & Slewing Bearing Manufacturer in China.

ZZ products are applied globally in solar tracking systems, wind power systems, satellite communications, and numerous other globally connected industries.