four-row tapered roller bearings

Four row tapered roller bearings are the one kind of roll neck bearings, their radial and axial loading capacity are high, can carry heavy axail loads in two directions, and their radial loading capacity is 3 times heavier than single row tapered roller bearings, but limiting speed is lower. They can be used as axial locating bearings in two directions because they are able to limit axial displacement in two directions within axial clearance. The radial and axial clearance also can be adjusted by changing the width of spacer between inner and outer rings.

Four-row tapered roller bearings are used successfully worldwide for rolling mill bearing arrangements where rolling speeds are slow to moderate. They are mainly used in the working roll necks of hot or cold rolling mills, and roll neck of cogging mills. They usually clearance fit with roll necks to being mounted and dismounted conveniently.

Steel pressed cages are usually used in four row tapered roller bearings, and pin type cages are for large size taper bearings.

We supplies many sizes of four row tapered roller bearings with integral radial shaft seals at both sides. They are available in several designs depending on bearing size as well as on the open (non-sealed) basic design.

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Boundary dimensions					Basic load ratings		Designations		Mass	Limiting speeds
mm					kN		Current	Original	kg	r/min
d	D	T	rmin	r1min	Cr	Cor	Current	Original	kg	Grease	Oil
150	210	165	2.5	2	700	1700	382930	2077930	16.5	670	850
	212	155	3	2.5	964	2350	30630	-	16.8	670	850
160	220	165	2.5	2	795	2090	382932	2077932	18.5	670	850
	265	173	3	2.5	1450	2760	380632	-	35.7	670	850
170	240	175	3	2.5	1210	3000	380634	-	24.2	670	850
	260	230	3	2.5	907	1720	382034	2077134	39.5	670	850
180	250	185	2.5	2	1280	3400	382936	-	27.5	670	850
	260	160	2.5	2	1140	2550	380636	-	26.7	670	850
200	282	206	3	2.5	1680	2510	380640	-	42.1	560	700
	310	200	3	2.5	1660	3100	382040X2	2077140	55.6	560	700
	310	275	3	2.5	1760	4200	382040	2077140	75.1	560	700
205	320	205	3	3	1590	3260	380641	77741	57	500	630
220	340	305	4	3	2070	5430	382044	2077144	97.9	500	630
225	320	230	2.5	2	1910	5000	380645	77745	58	500	630
230	315	190	2.5	2	1600	4310	380646	77746	42.5	500	630
240	360	310	4	3	2110	5610	382048	2077148	90.5	450	560
250	385	255	5	4	2870	6450	381050	77150	107	380	480
260	360	265	3	2.5	1760	5220	382952	2077952	76.3	450	560
	400	255	4	7.5	2300	5000	380652	77752	114	490	600
	400	345	5	4	2960	7380	382052	2077152	153	430	530
	440	300	2	5	3550	8200	380152	777752	164	450	560
280	395	288	5	5	3051	8320	380656	-	108	450	560
	420	250	5	5	2780	5700	380656X2	77756	119	450	560
	460	324	5	4	2840	7290	381156	1077756	200	360	450
300	420	300	4	3	2330	7210	382960	2077960	130	380	480
	420	310	4	3	3250	8150	380660	77860	134	380	480
	460	390	5	4	3180	9330	382060	2077160	238	360	450
	500	350	5	4	2980	6950	381160X2	77760	286	340	430
	500	370	5	4	3390	8710	381160	1077760	285	340	430
320	460	338	4	4	2950	8200	380664	77764	180	360	450
	460	380	4	4	3100	8750	380664X2	77864	218	360	450
	480	390	5	4	3180	9330	382064	2077164	234	340	430
	540	364	5	5	6330	14400	381164X2	-	347	340	430
340	460	310	4	3	2480	8100	382968	2077968	145	340	430
	480	350	5	5	4400	12600	380668	-	195	320	400
	520	325	5	4	3100	8620	381068	77168	234	320	400
	580	425	5	4	4580	11700	381168	1077768	441	280	360
350	590	420	2	5	4700	9700	380670	77770	475	280	360
355	490	316	4	4	4520	12200	380671	-	115	320	400

Boundary dimensions					Basic load ratings		Designations		Mass	Limiting speeds
mm					kN		Current	Original	kg	r/min
d	D	T	rmin	r1min	Cr	Cor	Current	Original	kg	Grease	Oil
360	480	310	4	3	2760	8300	382972	2077972	149	340	430
	480	375	3	3	3010	7870	382972X2	77872	189	340	430
	520	370	4	4	5560	14600	380672	-	253	300	380
	540	325	5	4	3388	8840	381072	77172	248	300	380
	540	360	5	5	5070	12500	381072X2	-	274	300	380
	600	420	6	6	7900	14000	381172	1077772	388	280	360
	600	540	5	5	9970	24900	381172X2	-	620	240	360
370	490	292	3	3	3800	11600	380674	-	149	340	430
380	520	400	4	3	5560	16100	380676	-	240	280	380
	550	350	5	5	5250	13100	380676	77776	273	280	380
	560	325	5	4	3360	8840	381076	77176	281	280	380
	560	360	5	5	5730	14000	381076X2	-	294	280	360
	620	388	6	6	4200	9500	381176X2	3077776	443	240	360
	620	420	5	4	4710	12300	381176	1077776	519	240	360
395	545	288.7	4	7.5	2610	7490	380679	77779	194	280	360
400	540	280	4	4	3100	8750	380680	77880	175	280	360
	600	356	5	4	4160	10400	381080	77180	317	240	320
420	620	356	5	4	4160	10400	381084	77184	358	220	300
	700	480	6	5	6780	18500	381184	1077784	760	190	260
	760	500	7.5	7.5	9350	20300	380684	77884	1039	180	240
440	620	454	6	6	3960	7880	380688	77888	440	200	280
	650	355	6	6	4290	12390	380088	77788	385	200	280
	650	376	6	5	4330	13700	381088	77188	401	200	280
460	620	310	4	3	3360	10200	381992	1077992	232	200	280
	650	474	6	6	5292	11270	380692	77892	495	180	240
	680	410	6	5	5130	14200	381092	77192	476.	180	240
	730	440	4	7.5	6500	15100	380692X3	77792	694	170	220
475	660	450	5	5	7330	22400	380695	77795	457	170	220
480	650	338	5	4	2450	5400	381996	1077996	301	190	260
	678	494	6	6	10600	31900	380696	-	578	170	220
	700	342	6	6	7050	17900	381096X2	-	447	170	220
	700	420	6	5	5780	16900	381096	77196	547	170	220
	790	510	7.5	7.5	11570	26900	381196X2	-	1017	120	160
490	625	385	4	4	5070	17670	380698	-	282	170	220
500	720	420	6	5	6650	19400	3810/500	771/500	565	160	200
	830	540	7.5	7.5	13230	33000	3811/500X2	-	1194	120	160
508	762	420	6	6	9050	23900	3806/508	-	684	160	200
520	735	535	6	6	10580	33400	3806/520	-	721	160	200
530	780	450	6	5	7520	21500	3810/530	771/530	744	140	180
	870	560	7.5	7.5	14400	36150	3811/530X2	-	1342	120	160
	870	590	7.5	6	9300	26100	3811/530	10777/530	1422	120	160
	880	544	7.5	7.5	10500	25600	3806/530	30777/530	1350	120	160
540	690	400	5	5	4860	17300	-	779/540	375	160	200
560	730	410	4	6	5560	18900	3828/560X	-	441	140	180

Boundary dimensions					Basic load ratings		Designations		Mass	Limiting speeds
mm					kN		Current	Original	kg	r/min
d	D	T	rmin	r1min	Cr	Cor	Current	Original	kg	Grease	Oil
560	750	368	5	4	4370	13300	3819/560	10779/560	456	140	180
	920	620	7.5	6	11200	26100	3811/560	10777/560	1635	100	140
600	800	365	5	5	5000	17800	-	779/600	489	120	160
	800	380	5	4	5500	18900	3819/600	10779/600	536	120	160
	855	620	6	6	14700	48100	3806/600	-	1155	100	140
	870	415	6	6	9790	27200	3810/600X2	-	831	100	140
	870	480	6	5	8370	25400	3810/600	771/600	995	100	140
	980	615	7.5	6	17600	45600	3811/600X2	-	1865	90	120
	980	650	7.5	6	12700	36700	3811/600	10777/600	1970	90	120
625	815	480	5	5	10400	31700	3806/625	777/625	647	100	140
630	850	418	6	5	6440	19800	3819/630	10779/630	720	100	140
	890	650	7.5	7.5	16970	53800	3806/630	-	1293	100	140
	920	515	7.5	6	9170	26800	3810/630	771/630	1158	95	130
	920	600	7.5	7.5	16500	48200	3810/630X2	-	1342	90	120
	1030	645	7.5	7.5	20270	53160	3811/630X2	-	2162	85	110
	1030	670	7.5	6	14400	39900	3811/630	10777/630	2170	85	110
650	1030	560	7.5	12	11460	22050	3806/650	777/650	1769	85	110
660	1070	650	7.5	7.5	12600	26500	3806/660	777/660	2282	80	100
670	900	412	6	5	6940	22300	3819/670	10779/670	959	95	130
	950	700	7.5	7.5	19800	61900	3806/670	-	1599	90	120
	980	475	7.5	7.5	13880	36500	3810/670X2	-	1224	90	120
	1090	690	7.5	7.5	22700	58800	3811/670X2	-	2566	75	95
	1090	710	7.5	6	15700	39900	3811/670	10777/670	2665	75	95
710	1030	490	7.5	7.5	14500	40600	3810/710X2	-	1372	75	95
	1030	555	7.5	6	11200	35800	3810/710	771/710	1568	75	95
	1150	710	9.5	8	24500	65000	3811/710X2	-	2931	48	80
	1150	750	9.5	8	15840	33960	3811/710	10777/710	3227	48	80
730	1035	755	7.5	7.5	22500	73200	3806/730	-	2043	75	95
750	1090	515	7.5	6	16200	45600	3810/750X2	-	1619	70	90
	1090	605	7.5	6	13100	42400	3810/750	771/750	1874	70	90
	1130	690	7.5	7.5	19000	51700	3806/750	777/750	2516	48	80
	1220	750	9.5	8	27430	7380	3811/750X2	-	3504	48	80
	1220	840	9.5	8	21900	68000	3811/750	10777/750	3994	48	80
774	1130	690	4	7.5	16700	50100	-	777/774	2400	48	80
780	1220	840	9.5	8	28400	74000	3806/780	779/780	3659	48	80
800	1120	820	7.5	7.5	26200	86300	3806/800	-	2842	-	-
840	1170	840	7.5	7.5	26300	86400	3806/840	-	2840	-	-
850	1360	900	12	9.5	38900	140600	3811/850	10777/850	5168	-	-
950	1360	880	7.5	6	23300	83600	3820/950	20771/950	4087	-	-
1060	1500	1000	9.5	8	29100	105000	3820/1060	20771/1060	5698	-	-
1070	1400	889.762	4	12	27270	90000	BT4B 328100	-	3730	-	-
1080	1450	950	5	12	30240	97200	BT4B 331559	-	4450	-	-
1250	1550	890	5	12	27270	102600	BT4B 328819	-	3820	-	-
1260	1640	1000	5	12	35190	128700	BT4B 332124	-	5800	-	-
1300	1720	1040	5	12	38610	126000	BT4B 331950	-	7000	-	-
1500	1900	1080	4	12	42120	153000	BT4B 332078	-	7700	-	-
1580	1960	1080	5	12	41130	158400	BT4B 331934	-	7800	-	-