/ Single row roller slewing bearings

digger slew ring

1.Product Introduction: Commonly known as excavator slewing bearings, suitable for 6 - 30 tons of medium and large excavators, capable of bearing high-strength loads and impacts, and adapting to harsh working conditions in mines and infrastructure projects.
2.Structure Type: It has a large-diameter annular thick-wall structure. The inner and outer rings are made of high-strength steel, with built-in double-row steel balls or rollers. Metal skeleton seals are used to prevent sediment, and countersunk mounting holes are suitable for high-strength bolts.
3.Size Range: Outer ring diameter: 800 - 4000mm, inner ring diameter: 700 - 3800mm, height: 30 - 150mm.
4.Material: Inner ring / outer ring: 50Mn, 42CrMo; rolling elements: GCr15 bearing steel, GCr15SiMn (optional for impact resistance); seals: nitrile rubber, fluororubber (optional for oil and high temperature resistance).
5.Application Fields: 6 - 30 tons of medium and large excavators, mining excavators, heavy construction machinery (crawler cranes).
6.Key Inspection Items: Anti-overturning moment performance, integrity of metal seals.

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Product Description

Data Sheet

High-Performance Digger Slew Rings for Extreme Load & Harsh Environments

When your heavy machinery faces relentless demands—from mining sites to infrastructure projects—every component must deliver unmatched durability. At LUOYANG INNO BEARING CO., LTD, we engineer digger slew rings that redefine reliability. Designed for excavators (6-30 tons), our slew rings withstand axial forces up to 50,000kN, radial loads exceeding 30,000kN, and operate seamlessly in temperatures ranging from -40°C to 120°C. With ISO 9001-certified production and a 99.9% defect-free guarantee, we ensure your equipment stays productive even in the most abrasive conditions.

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Engineering Excellence for Heavy-Duty Applications

Built to Outlast Extreme Conditions

Our excavator slewing bearings combine high-purity forged steel (50Mn/42CrMo) with advanced heat treatment, achieving surface hardness of 55-60 HRC. Key features include:

Double-row roller design: Distributes heavy loads evenly, reducing stress concentrations by 30%.
IP6X sealed raceways: Prevent dust, mud, and moisture ingress—critical for mining and construction sites.
Precision-ground gear teeth: Maintain ≤0.1mm radial runout for smooth rotation under high torque.

Custom Solutions, Faster Turnarounds

Need non-standard dimensions? Our modular production system delivers custom digger slew rings (φ800mm–φ5000mm) in 15-20 days—50% faster than industry averages. Whether retrofitting legacy equipment or designing for new OEM models, our engineers use 3D scanning and CAD simulations to optimize:

Gear tooth profiles for reduced backlash
Mounting hole patterns compatible with CAT, Komatsu, and Hitachi excavators
Material upgrades (e.g., GCr15SiMn rollers) for impact-heavy applications

Rigorous Quality Assurance You Can Trust

Every slewing ring for excavators undergoes:

1. Ultrasonic testing: Detects subsurface flaws in raw materials.

2. 3D coordinate measurement: Verifies gear profile accuracy within ±0.05mm.

3. Fatigue testing: Simulates 50,000+ operational cycles to validate lifespan.

Our certifications (CE, ISO, ASTM F2853) ensure compliance with global standards, while region-specific adaptations meet EU’s REACH and North America’s OSHA requirements.

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Global Logistics, Localized Support

With 1,000+ standard slew rings in stock and regional warehouses, we ship 90% of orders within 48 hours. Urgent requests? Our dedicated logistics network prioritizes:

Air freight for prototype deliveries (3-5 days)
40HQ containers for bulk orders (φ3000mm+ rings)

Maximize ROI with Smart Engineering

Reduce downtime and maintenance costs through:

IoT-enabled slew rings: Monitor load distribution and wear in real time via integrated sensors.
Lifecycle cost analysis: Compare 10-year operational savings (up to 35% vs. conventional bearings).
Old bearing recycling: Offset costs by trading in worn components.

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FAQ

1. How do your products handle abrasive environments like mining?

We use SUJ2 steel rollers and fluororubber seals to resist particulate wear and chemical corrosion, extending service life by 30% in harsh conditions.

2. Can you create slew rings for legacy excavator models?

Yes! Our engineers perform on-site dimensional mapping to retrofit older equipment with precision-fit replacements.

3. What certifications validate your quality claims?

All bearings meet ISO 281, DIN 628, and CE standards. Regional certifications include API for mining and ASTM for North America.

4. How fast can you deliver a φ4000mm custom slew ring?

Just 15-20 days post-design approval—supported by pre-machined semi-finished blanks in our inventory.

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Ready to Upgrade Your Machinery's Core Component?

📩 Request a Custom Quote

Get a tailored solution for your digger slew ring needs within 2 hours. Specify:

Outer/Inner Diameter
Dynamic Load Requirements
Environmental Challenges

📥 Download Free Engineering Guide

Learn best practices for installation, lubrication, and predictive maintenance.

✉️ Contact Us Today

Email: sales@inno-bearing.com

Serving OEMs and contractors across 60+ countries since 1993.

Four-point Contact Ball Slewing Bearing-with Internal Teeth
D235～1440mm
Boundary Dimension			Bearing Type	Related Dimension												Gear Parameter					Weight
d	D	T		D1	d1	d2	H	h	DwP	n1	n2	n3	φ1	φ2	φ3	da	b	m	Z	X
mm				mm																	kg≈
235	380	54	013,20,310.12	358	259	309	44	10	210	1	12	12	M10X1	M12	M12	216	39	4	56	0	25.6
一一	456	57.5	2787/327	490	375	413	46	11.5	413.5	4	12	8	M10X1	M12	18	327	45.5	5	67	0	30
450	654.8	92	278790G2	626	478	545.8	90	2	547.5	2	8	8	M10X1	M8	M16	440	40	4	112	0	117
458	662	80	014,30,560.12	626	494	558.5	70	10	560	4	20	20	M10X1	18	18	426.3	60	6	72	0.5	94
512	741	80	D2787/512	705	550	619	66	14	627	4	14	24	M10X1	24	M12	470	55	5	96	0	99.6
一一	748	56	2787/546G2	720	605	642	56	10	644	4	18	12	M10X1	M10	18	547	46	6	93	0	51.1
601.5	735.8	52	D2787/575	712.5	625	663	45	7	668	2	18	18	M10X1	1/2	13.5	575	37	5	116	0.5	46.9
608	812	80	013,30,710.12	776	644	704	70	10	710	4	24	24	M10X1	18	18	570	60	6	86	0.5	120
一一	896	68	013,25,800.11	858	742	800	58	10	800	2	20	20	M10X1	M16	17	664	58	8	84	0.5	111
678	922	100	013,40,800.12	878	722	798.5	90	10	800	6	30	30	M10X1	22	22	632	80	8	80	0.5	256
720	900	70	LY-Q035	860	750	808	50		812	6	36	36	M10X1	M10	11	690.54	50	5	140	0	109
720	900	70	LY-Q035K1	860	750	808	50	10	810	6	34	36	M10X1	M10	M10	690.54	50	5	140	0	108
781	1022	105	013.30.900.03K/P5	978	825	899	90	10	900	6	30	30	M10X1	18	18	744.32	80	8	94	0.5	248
794	1008	78	013,25,900.12	964	836	900	68	10	900	2	20	20	M10X1	22	22	744	58	8	94	0.5	181
一一	1200	90	2782/922G2	1160	1015	1086	80	10	1087.5	4	12	12	M10X1	M8	22	922	80	10	94	0	251
875	1170	95	013.32.1020.11	1120	930	1020	80	15	1020	4	24	24	M10X1	22	22	830.1	70	8	105	0.35	294
975	1250	150	2787/975	1210	1015	1102	133	17	1100	6	30	29	7	M20	22	914.4	120	12	78	0	519
一一	1198	59	2787/985.6	1170	1055	1092.5	45.5	10.5	1094	4	24	16	M10X1	14	18	985.6	42.5	8	125	0	81.7
988	1242	105	013.30.1120.03K/P5	1198	1042	1119	90	10	1120	6	36	361	M10X1	18	18	960.25	80	8	121	0.5	298
998	1242	100	013.40.1120.12	1198	1042	1118	90	10	1120	6	36	36	M10X1	M20	22	944	80	18	95	0.5	309
1010	1175	90	D2787/1010	1144	1034	1087	72	18	1089	6	36	36	M10X1	16.5	16.5	968	60	8	123	0	147
一一	1200	56	LY-Q036	1170	1044	1088	46	10	1090	4	24	16	M10X1	10.5	17	990	46	5	200	0	114
1000	1270	100	2782/1000GK	1220	1050	1133	85	15	1135	2	2	24	M10X1	17/M12	17/M12	972.6	70	6	164	0	322
1020	1250	64	2787/1020G2	1210	1060	1133	54	10	1135	3	30	30	M10X1	17	13.5	991	27	5	200	0	176
1090	1400	120	013.40.1250.11	1350	1150	1250	105	15	1250	4	36	36	M10X1	22	22	1037	90	10	105	0.35	495
1110	1390	110	013.45.1250.03K/P5	1337	1163	1248	100	10	1250	5	40	40	16	M24	26	1048.8	90	12	88	0.5	404
一一	1382	85	013.35.1257.12	1332	1182	1257	75	10	1257	4	40	40	M10X1	24	24	1068	75	12	90	0.5	290
1140	1480	126	2787/1140	1400	1200	1298	113	13	1300	10	40	59	M10X1	26	M24	1092	100	10	110	0.5	634
1130	1323	99	2787/1083.7	1274	1162	1199	77	8	1201	2	32	32	M10X1	M20	36	1083.7	90	10	110	0	241
1180	1500	130	D2787/1180K	1430	1220	1315	110	20	1325	4	24	24	M10X1	M24	27	1110.5	110	6	187	0	673
1180	1500	130	D2787/1180	1430	1220	1315	110	20	1325	4	24	24	M10X1	M24	27	1121.3	110	10	114	0	636
一一	1640	115	2787/1190	1570	1300	1432	100	15	1435		48	48		M24	26	1190	100	10	119	0.75	704
1210	1530	122	2787/1210G2	1480	1260	1368	108	12	1370	4	40	39	ZG1/4	26	26	1164	80	10	118	0	540
1260	1544	102	013.40.1400.11	1486	1314	1402	90	12	1402	4	36	36	M10X1	26	26	1188	80	12	100	0.5	447
1260	1540	110	013.45.1400.12K	1487	1313	1398	100	10	1400	6	48	48	M10X1	M24	26	1192.8	90	12	100	0.5	490
1260	1540	110	013.35.1400.03/P5	1487	1313	1390	100	10	1400	4	40	40	10	26	M24	1194	100	6	200	0.5	513
1278	1595	120	013.40.1435.11	1535	1335	1436.5	105	15	1435	6	36	26	M10X1	26	26	1221.15	90	12	103	0.35	574
1284	1630	140	013.60.1465.03	1578	1350	1463	130	10	1465	4	36	22	M10X1	M27	29	1218.6	100	14	88	0.5	782
1300	1535	64	E2787/1300	1480	1350	1413	59	15	1415	6	36	36	M10X1	18	18	1270	49	5	256	0	188
1378	1695	165	2787/1278	1636	1434	1534	125	25	1535	8	40	40	M10X1	M27	30	1278	140	18	72	0.5	949
1400	1715	110	2787/1400K1	1660	1460	1558	95	15	1600	2	24	24	M10X1	23	23	1364.5	77	6	230	-0.35	545
1400	1715	110	2787/1400GK	1660	1460	1558	95	15	1560	2	24	24	M12	M20	M20	1364.5	77	6	230	-0.35	545