Four-Row Cylindrical Roller Bearings

• • • • • • • ZYS four-row cylindrical roller bearings are mainly used for heavy machineries, such as mounted on the backup roll of blooming mill, section mill, plate mill, etc. ZYS four-row cylindrical roller bearings are mainly used on the roll necks of hot or cold rolling mills used for forming blooms, plates, and other stock. There are many variations of the bearings: the inner and outer rings can have ribs or not, the inner ring can be in one or two pieces, the bore can be cylindrical or tapered, and other variations.

              All four-row cylindrical roller bearings only support radial loads, therefore, they must be used in combination with thrust bearings such as angular contact ball bearings or tapered roller bearings.

              The four-row cylindrical roller bearing is a typical rolling mill bearing. The parts can be separated from each other, and the parts can be exchanged with high precision. The installation, disassembly and cleaning are very convenient. In a given radial installation space, it can provide the largest radial load capacity, and has a low friction coefficient.

              There are three main types of structure, namely: FC type, FCD type, FCDP type four-row cylindrical roller bearings. 

              FC type four-row cylindrical roller bearings:

              FC type bearing for rolling mill is a separable bearing, and the integral inner ring can be separated from the whole set of bearings, with high limit speed and interchangeability. The cage is a machined brass cage. FC type four-row cylindrical roller bearings must firstly be suitable for high-speed rotation (35m/S) . Carrying capacity is the second factor to be considered. Generally, a four-row cylindrical bearing with an inner diameter of 80 mm-260 mm is designed as a secondary structure and mainly used in the work roll part of cold rolling four-roller, six-roller and twelve-roller

              FCD type four-row cylindrical roller bearings:

              FCD type bearing for rolling mill is a separable bearing, and the degree of separability is poor compared to the FCDP structure, except that the two inner rings can be separated from the entire set of bearings,and it has a higher limit speed and interchangeability. The cage of FCD type rolling mill bearing is machined brass or steel cage. This type of bearing is not only suitable for high speed (35m / S) but also can withstand heavy loads at the same time. Generally, four-row cylindrical bearings with inner diameter of 260mm -400mm are designed as secondary structure. FCD type rolling mill bearing is mostly used in the section finishing mill and high-speed wire rod rough rolling, intermediate rolling and pre-finishing rolling parts, including the backup roll, intermediate roll and work roll part of cold rolled nonferrous and ferrous metal rolling mill.

              FCDP type four-row cylindrical roller bearings:

              It is typical rolling mill bearing which parts can be separated from each other, and  installation, disassembly, cleaning is very convenient. In a given installation space, it can provide maximum radial load capacity, and has a low friction coefficient. Therefore, FCDP type bearing for rolling mill is suitable for the roll diameter of the rolling mill with high speed, heavy load and harsh working environment.

              In order to accommodate the maximum number of rolling elements to provide the best radial load-bearing capacity, the cage of the four-row cylindrical roller bearing with an inner diameter of more than 400 mm is generally designed as a pin-type cage, which consists of two washers and a post connecting the two washers and passing through the center of the roller. And the two ends of the final pillar and the gasket are riveted and fixed by argon arc welding, and the cage has high strength. This is very important for bearings that withstand frequent shocks or withstand large acceleration and deceleration movements.

              

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              Dimensions (mm)						Basic Load Ratings (kN)		Bearing No.Mass (kg)	Mass(kg)
              d	D	B	F	r	r1	Cr	C0r		≈
              				min	min
              200	290	192	226	2.5	2.5	1430	3450	FC 4058192	42.5
              210	290	192	236	2.5	2.5	1365	3565	FC 4258192	39.5
              220	310	192	246	2.5	2.5	1500	3760	FC 4462192	46.9
              220	310	225	245	2.5	2.5	1695	4410	FCD 4462225	54.9
              220	320	160	245	3	3	1385	3165	FC 4464160	46.5
              220	320	210	248	2.5	2.5	1710	4155	FCD 4464210	60.5
              230	330	206	260	2.5	2.5	1720	4245	FCD 4666206	58.3
              240	330	220	270	3	3	1735	4665	FCD 4866220	56.8
              240	340	220	268	3	3	1850	4710	FCD 4868220	63.6
              240	360	220	272	2.5	2.5	2060	4800	FCD 4872220	79.6
              250	350	220	278	3	3	1885	4885	FCD 5070220	66
              260	360	260	287	2.5	2.1	2185	5985	FCD 5272260	81.5
              260	370	220	292	3	3	2030	5110	FCD 5274220	77.1
              260	380	280	294	3	3	2580	6560	FCD 5276280	109
              260	400	290	296	4	2	2910	6915	FCD 5280290	135
              280	350	208	298	2.5	2.5	1540	4995	FCD 5670208	46.4
              280	390	220	312	3	3	2105	5465	FCD 5678220	81.3
              280	390	275	312	2.5	2.5	2505	6830	FCD 5678275	105
              280	420	280	323	4	4	2930	7130	FCD 5684280	139
              300	400	300	328	3	3	2620	7875	FCD 6080300	104
              300	420	240	332	3	3	2455	6400	FCD 6084240	105
              300	420	300	332	3	3	2920	7995	FCD 6084300	130
              300	430	240	338	3	3	2570	6445	FCD 6086240	115
              300	460	270	344	3	3	3190	7420	FCD 6092270	162
              320	450	240	358	3	3	2655	6835	FCD 6490240	125
              320	460	340	360	3	3	3635	9750	FCD 6492340	178
              330	440	200	360	3	3	2115	5775	FC 6688200	83.6
              330	460	340	365	4	4	3530	9955	FCD 6692340	181
              340	480	350	378	4	4	3830	10605	FCD 6896350	211
              360	480	290	388	3	3	3100	9135	FCD 7296290	148
              360	510	370	400	4	4	4280	11880	FCD 72102370	244
              360	510	400	397	5	5	4545	12845	FCD 72102400	262
              370	480	230	400	5	5	2490	7380	FCD 7496230	106
              370	480	250	401	3	3	2660	8025	FCD 7496250	118
              370	520	380	409	5	5	4430	12510	FCD 74104380	256
              370	520	400	409	5	5	4610	13170	FCD 74104400	273
              380	520	280	417	4	4	3395	9385	FCD 76104280	174
              380	520	290	418	4	4	3490	9720	FCD 76104290	185
              380	520	300	416	4	4	3580	10055	FCD 76104300	210
              380	540	400	422	4	4	4850	13570	FCD 76108400	325
              400	560	400	446	5	5	4970	14215	FCD 80112400	303
              400	560	410	445	4	4	5070	14575	FCD 80112410	349
              400	590	420	450	4	4	5715	15185	FCD 80118420	399
              420	560	280	457	4	4	3560	10290	FCDP 84112280	189
              420	580	230	466	4	4	3310	8545	FCDP 84116230	181
              420	600	440	470	6	2.5	5875	16530	FCDP 84120440	423
              420	620	400	478	5	5	5810	15190	FCDP 84124400	410
              440	620	450	487	5	5	6115	17630	FCDP 88124450	450
              460	620	400	502	4	4	5315	16155	FCDP 92124400	383
              460	620	460	502	4	4	5925	18575	FCDP 92124460	417
              460	650	470	509	5	5	6675	19270	FCDP 92130470	540
              470	660	470	517	5	5	6745	19650	FCDP 94132470	529
              480	600	236	510	3	3	3035	9715	FCDP 96120236	155
              480	650	420	523	5	5	5840	17725	FCDP 96130420	423
              480	680	420	528	6	6	7200	19000	FCDP 96136420	500
              480	680	500	532	6	6	7365	21410	FCDP 96136500	640
              500	690	470	547	5	5	6945	20785	FCDP 100138470	590
              500	690	510	552	5	5	7400	22555	FCDP 100138510	640
              500	700	515	554	5	5	7690	22880	FCDP 100140515	680
              500	710	480	558	6	6	7490	21425	FCDP 100142480	675
              500	720	530	568	5	5	8320	23765	FCDP 100144530	780
              510	670	320	554	5	5	4695	14210	FCDP 102134320	335
              510	700	540	558	6	6	7810	24315	FCDP 102140540	689
              520	700	540	564	6	6	7635	24640	FCDP 104140540	658
              520	720	550	566	5	5	8250	25325	FCDP 104144550	715
              520	735	535	574.5	5	5	8425	24800	FCDP 104147535	740
              530	700	540	574	6	6	7445	24965	FCDP 106140540	626
              530	760	520	587	6	6	8655	24680	FCDP 106152520	800
              530	780	570	601	6	6	9770	27290	FCDP 106156570	1010
              550	800	520	622	6	6	9260	25735	FCDP 110160520	965
              560	680	360	590	3	3	4545	17145	FCDP 112136360	265
              570	800	514	626	2.5	6	8885	26055	FCDP 114160514	849
              570	815	594	628	6	6	10320	30295	FCDP 114163594	1040
              600	820	575	660	7.5	7.5	9675	30420	FCDP 120164575	941
              600	870	540	672	7.5	7.5	10405	29125	FCDP 120174540	1150
              600	870	640	672	7.5	7.5	11875	34515	FCDP 120174640	1330
              610	870	660	680	9.5	7.5	11985	35990	FCDP 122174660	1400
              640	880	600	700	6	6	10860	33925	FCDP 128176600	1150
              650	920	670	723	7.5	4	12785	38835	FCDP 130184670	1500
              650	920	680	723	7.5	7.5	12935	39415	FCDP 130184680	1510
              650	920	690	723	7.5	7.5	13085	39995	FCDP 130184690	1550
              660	820	440	702	5	4	6815	24865	FCDP 132164440	580
              680	1020	650	803	6	6	14640	40185	FCDP 136204650	1970
              680	1020	680	775	3	5	15165	42040	FCDP 136204680	2060
              690	980	715	767.5	7.5	7.5	14440	44045	FCDP 138196715	1850
              690	980	750	766	7.5	7.5	14990	46200	FCDP 138196750	1900
              710	1000	715	787.5	9.5	6	14645	45195	FCDP 142200715	1900
              725	1000	700	796	6	6	14100	44880	FCDP 145200700	1730
              750	1000	670	813	6	6	13085	43965	FCDP 150200670	1520
              760	1030	750	828	7.5	7.5	15045	50125	FCDP 152206750	2000
              800	1080	700	878	7.5	7.5	14935	49185	FCDP 160216700	1950
              800	1080	750	880	6	6	15755	52700	FCDP 160216750	2090
              820	1130	800	903	7.5	7.5	17815	57995	FCDP 164226800	2450
              820	1160	840	910	7.5	7.5	19545	61415	FCDP 164232840	2930
              830	1080	710	896	6	6	14370	51165	FCDP 166216710	1780
              840	1160	840	920	5	7.5	19080	62420	FCDP 168232840	2840
              850	1150	650	941	9.5	9.5	15120	48560	FCDP 170230650	1980
              850	1150	800	930	6	6	17770	59765	FCDP 170230800	2430
              850	1150	840	928	6	6	18460