Teeth Harden Slewing Ring Turntable Bearing For Tower Crane

Slewing bearings play a key role in tower crane design, enabling smooth rotation and precise positioning. As the core component of the tower crane, the slewing bearing ensures the stability of the superstructure and enables the hook and load to move accurately. Its high load capacity and compact design allow the tower crane to operate more efficiently in tight building spaces while meeting the heavy lifting needs of construction sites. The weather resistance and stability of the slewing bearing are also brought into play under various weather conditions. Regular maintenance ensures the reliability of the slewing bearing and ensures the safety and performance of the tower crane operation. Overall, slewing bearings provide important support for tower crane operations on construction sites by providing a reliable rotation mechanism, promoting efficient construction projects.

Description

Turntable bearings play a critical role in the functionality of tower cranes, which are commonly used in construction for lifting and transporting heavy loads. The turntable bearing, also known as a slewing bearing, enables the rotation of the crane’s upper structure, including the jib and counter-jib, providing the crane with the ability to swing and position loads precisely.

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No.	Curve	Dimensions									Fixing Holes						Gear Parameter				Load		N.W (kg)
No.	Curve	De (mm)	de (mm)	di （mm）	Di （mm）	Dx （mm）	He （mm）	Hi （mm）	Ht （mm）	Hd （mm）	Fe (mm）	Fi （-）	N	V (mm）	L	W （-）	m （mm）	Z （-）	xm （mm）	Dp （mm）	fznorm (KN)	fzmax (KN)	N.W (kg)
ZZ-SL-W.20.307	1	432	309	305	224	394	83	83	92	50	360	254	16	17	25	12	6	70	-	420	20.4	40.8	51
ZZ-SL-W.20.383	2	504	385	381	300	466	83	83	92	75	436	330	16	17	25	12	8	61	-	488	40.8	81.6	64
ZZ-SL-W.25.475	3	595	477	473	382	565	88	88	98	50	540	410	24	17	25	14	5	117	-	585	17	34	85
ZZ-SL-W.25.575	4	712	577	573	470	670	88	88	98	75	640	508	24	17	25	9	8	87	-	696	40.8	81.6	123
ZZ-SL-W.20.752	5	864	754	750	678	833	83	83	92	76	800	706	36	17	25	9	6	142	-	852	31.01	62.02	114
ZZ-SL-W.25.821	6	979	823	819	718	935	92	92	102	86	893	753	36	21	31	15	10	94	+11	940	70.63	141.26	200
ZZ-SL-W.20.968	7	1080	970	966	893	1042	83	83	92	76	1015	922	30	17	25	10	8	133	-	1064	41.34	82.69	148
ZZ-SL-W.25.1077	8	1200	1079	1075	976	1163	88	88	98	77	1135	1012	36	19	-	-	8	148	-	1184	41.89	83.78	210
ZZ-SL-W.30.1215	9	1380	1218	1212	1095	1330	98	98	108	90	1290	1135	48	23	34	16	10	136	-	1360	61.2	122.4	325
ZZ-SL-W.20.383	1	504	385	381	300	394	83	83	92	75	436	330	16	17	25	12	8	61	-	488	48	96	64
ZZ-SL-W.25.475	2	614.4	477	473	378	565	88	88	98	80	540	410	24	19	28	14	8	74	+4	592	51.2	102.4	98
ZZ-SL-W.25.575	3	695	577	573	470	670	83	83	92	58	640	508	30	17	25	13	5	136	+2.5	680	23.2	46.4	104
ZZ-SL-W.25.980	4	1144	982	978	870	1096	96	96	110	88	1050	910	36	21	31	12	10	111	+8	1110	85.02	170.05	262
ZZ-SL-W.30.1117	5	1289	1120	1114	985	1240	98	98	108	83	1198	1035	40	21	31	18	10	125	+10.5	1250	80.19	160.39	332
ZZ-SL-W.30.1215	6	1380	1218	1212	1095	1330	98	98	108	90	1290	1135	36	23	34	16	10	136	-	1360	72	144	334
ZZ-SL-W.30.1249	7	1476	1252	1246	1085	1415	101	101	110	89	1350	1150	48	26	37	23	10	144	+8.6	1440	85.99	171.98	502
ZZ-SL-W.35.1249	1	1472	1252	1246	1085	1406	134	134	144	115	1350	1150	36	28	41	27	14	102	+9.1	1428	147.78	295.56	640
ZZ-SL-W.30.1391	2	1603	1394	1388	1208	-	110	110	120	110	1500	1280	40	29	-		10	157	+7.5	1570	100.97	201.93	636
ZZ-SL-W.40.1402	3	1604	1405	1399	1208	1570	138	134	148	93	1500	1280	48	31	46	24	10	157	+7	1570	147.78	295.56	710
ZZ-SL-W.25.1391	4	1605	1394	1388	1208	1550	116	116	130	96	1494	1280	48	29	41	22	12	130	+12	1560	105.74	211.48	623
ZZ-SL-W.40.1390	5	1634	1393	1387	1208	-	138	134	148	138	1500	1280	48	31	46	24	14	113	+14	1582	177.33	354.67	800
ZZ-SL-W.30.1578	6	1808	1581	1575	1404	-	110	110	120	110	1680	1476	40	29	-	-	10	178	+5	1780	100.97	201.93	754
ZZ-SL-W.35.1578	7	1805	1581	1575	1433	-	140	140	156	140	1671	1485	60	28	41	15	16	109	+16.9	1744	205.6	411.21	810

ZZ is famous for its rich 20 years of slewing bearing production experience. As an important player in the industry, ZZ focuses on the design and manufacturing of slewing bearing products. The company’s long experience has given it deep expertise in delivering high-quality, reliable solutions. ZZ’s slewing bearing products are widely used in many fields, including construction, heavy industry, wind energy and medical equipment. The company focuses on innovation and provides customers with customized solutions to meet the needs of different applications.