Four-Row Tapered Roller Bearings – Spacerless Design

Spacerless four-row tapered roller bearings use an integrated arrangement without separate intermediate spacer rings. The design simplifies component handling and supports compact, high-capacity roll-neck assemblies where controlled internal geometry and reliable combined-load performance are required.

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Model:
FTWS0001, FTWS0004, FTWS0010, FTWS0022, FTWS0033, FTWS0040, FTWS0054, FTWS0068, FTWS0078, FTWS0084

Product Overview

Available models and complete dimensional data are listed in the following parameter table tab.

Models & Dimensions

Bearing Designation	Boundary Dimensions (mm) – d	Boundary Dimensions (mm) – D	Boundary Dimensions (mm) – T	Boundary Dimensions (mm) – B	Boundary Dimensions (mm) – d1	Boundary Dimensions (mm) – D1	Boundary Dimensions (mm) – r1,2min	Boundary Dimensions (mm) – r3,4min	Basic Load Ratings (kN) – Cr	Basic Load Ratings (kN) – Cor	Calculation Factors – e	Calculation Factors – Y1	Calculation Factors – Y2	Calculation Factors – Y0	SKF	Kg
FTWS0001	260.35	422.275	317.5	314.325	298	372	6.4	3.3	4460	8000	0.33	2	3	2	BT4B331487BG/HA1	165
FTWS0002	292.1	422.275	269.875	269.875	324	379	6.4	3.3	3800	8000	0.31	2.2	3.3	2.2	BT4B331968BG/HA1	125
FTWS0003	304.8	419.1	269.875	269.875	328	378	1	6.4	2920	6700	0.31	2.2	3.3	2.2	BT4-8057G/HA1C300VA901	105
FTWS0004	304.8	495.3	342.9	342.9	350	440	2	6.4	5120	9300	0.4	1.7	2.5	1.6	BT4-8061G/HA1C400VA901	245
FTWS0005	304.902	412.648	266.7	266.7	325	374	3.3	3.3	3190	7500	0.31	2.2	3.3	2.2	BT4-0004G/HA1	100
FTWS0006	317.5	422.275	269.875	269.875	342	384	1.5	3.3	3360	8150	0.31	2.2	3.3	2.2	330870BG	105
FTWS0007	317.5	422.275	269.875	269.875	338	389	1.5	3.3	3250	6550	0.33	2	3	2	BT4B334023E1/C675	94.5
FTWS0008	317.5	447.675	327.025	327.025	340	398	3.3	3.3	4730	10800	0.33	2	3	2	BT4B331161BG/HA1	165
FTWS0009	330.302	438.023	254	247.65	354	394	1.5	3.3	2810	7350	0.46	1.5	2.2	1.4	BT4B331664AG/HA1	105
FTWS0010	333.375	469.9	342.9	342.9	362	420	3.3	3.3	4130	10200	0.33	2	3	2	BT4-8017/HA1C600VA941	185
FTWS0011	340	520	323.5	323.5	378	490	6	6	5610	10400	0.3	2.3	3.4	2.2	BT4B332963B/HA1	240
FTWS0012	342.9	533.4	301.625	307.975	390	475	3.3	3.3	4730	8800	0.33	2	3	2	BT4-8034G/HA1	240
FTWS0013	343.052	457.098	254	254	366	413	1.5	3.3	3450	6800	0.48	1.4	2.1	1.4	330661E/C475	110
FTWS0014	343.052	457.098	254	254	362	420	1	3.3	3350	6400	0.48	1.4	2.1	1.4	BT4B328817E1/C475	110
FTWS0015	343.052	457.098	254	254	362	420	1	3.3	2550	6000	0.68	1	1.5	1	BT4B334106BG/HA1C300VA901	105
FTWS0016	347.662	469.9	260.35	260.35	372	430	1.5	3.3	3910	8500	0.33	2	3	2	BT4B331077BG/HA1	125
FTWS0017	355	490	316	316	382	446	1.5	3.3	4460	10000	0.33	2	3	2	BT4-8020G/HA1VA901	170
FTWS0018	355.6	482.6	269.875	265.113	382	432	1.5	3.3	4000	8000	0.48	1.4	2.1	1.4	330662E/C480	140
FTWS0019	355.6	482.6	269.875	265.113	380	436	1.5	3.3	3550	7500	0.46	1.5	2.2	1.4	BT4B328870EX1/C480	134
FTWS0020	355.6	488.95	317.5	317.5	392	448	1.5	3.3	4460	11000	0.33	2	3	2	331271BG	180
FTWS0021	355.6	488.95	317.5	317.5	382	446	1	3.3	5100	10000	0.33	2	3	2	BT4B328912E3/C675	170
FTWS0022	360	540	325	325	398	485	1.5	3	5720	10800	0.3	2.3	3.4	2.2	BT4-8015G/HA1	250
FTWS0023	380	560	360	390	417	500	3.3	5	6710	13700	0.4	1.7	2.5	1.6	BT4-8033G/HA1	300
FTWS0024	384.175	546.1	400.05	400.05	416	496	3.3	6.4	6160	15000	0.35	1.9	2.9	1.8	BT4-8025G/HA1C300VA903	300
FTWS0025	385.762	514.35	317.5	317.5	411	471	1	3.3	4180	10000	0.4	1.7	2.5	1.6	BT4B334042BG/HA1VA901	175
FTWS0026	406.4	546.1	288.925	288.925	434	494	1.5	6.4	5000	10200	0.48	1.4	2.1	1.4	BT4B330650E/C500	186
FTWS0027	406.4	546.1	288.925	288.925	434	498	1.5	6.4	4180	9500	0.48	1.4	2.1	1.4	BT4B328838BG/HA1VA901	180
FTWS0028	406.4	546.1	288.925	288.925	434	498	1.5	6.4	4180	9500	0.48	1.4	2.1	1.4	BT4B328838BG/HA1VA902	180
FTWS0029	406.4	546.1	288.925	288.925	434	498	1.5	6.4	3300	7800	0.68	1	1.5	1	BT4-8014G/HA1VA901	185
FTWS0030	406.4	546.1	288.925	268.288	434	494	1.5	6.4	4180	9500	0.48	1.4	2.1	1.4	331465BG	180
FTWS0031	406.4	546.1	330	330	434	498	1.5	6.4	4400	10200	0.48	1.4	2.1	1.4	BT4B334093BG/HA1VA902	200
FTWS0032	406.4	546.1	330	330	438	498	1.5	6.4	5010	13200	0.43	1.6	2.3	1.6	BT4B334092AG/HA1	225
FTWS0033	406.4	565.15	440	440	436	508	1.5	6.4	7650	18600	0.33	2	3	2	BT4-8002G/HA1	340
FTWS0034	409.575	546.1	334.962	334.962	434	498	1	6.4	4840	12000	0.4	1.7	2.5	1.6	BT4-8021G/HA1VA919	205
FTWS0035	409.575	546.1	334.962	334.962	434	498	1	6.4	4840	12000	0.4	1.7	2.5	1.6	BT4B329004BG/HA1VA901	205
FTWS0036	409.575	546.1	334.962	334.962	438	490	1.5	6.4	5010	13200	0.43	1.6	2.3	1.6	BT4B331333BG/HA1	220
FTWS0037	420	574	480	480	450	530	2.5	5	7210	18600	0.31	2.2	3.3	2.2	BT4-8018G/HA1VA901	345
FTWS0038	430	570	380	380	458	510	2	5	5280	14000	0.44	1.5	2.3	1.4	BT4-8049G/HA1	260
FTWS0039	430	575	380	380	458	518	1.5	5	6440	16600	0.4	1.7	2.5	1.6	BT4-8006BG/HA1	280
FTWS0040	430	640	465	465	486	578	2.5	4	9520	21200	0.26	2.6	3.9	2.5	BT4-8040G/HA4	530
FTWS0041	431.8	571.5	279.4	279.4	458	530	1.5	3.3	3740	9000	0.54	1.25	1.8	1.3	BT4-8019G/HA1VA901	185
FTWS0042	431.8	571.5	336.55	336.55	458	516	1.5	3.3	5280	14000	0.44	1.5	2.3	1.4	BT4B331226BG/HA1	240
FTWS0043	431.8	571.5	336.55	336.55	458	530	1.5	3.3	4840	12700	0.44	1.5	2.3	1.4	BT4-8003G/HA1VA902	215
FTWS0044	440	590	480	480	468	539	1	5	7650	20000	0.28	2.4	3.6	2.5	BT4B334055ABG/HA1VA902	365
FTWS0045	447.6	635	463.5	463.5	488	588	3.3	6.4	7650	20000	0.33	2	3	2	BT4-8039G/HA1VA901	470
FTWS0046	450	595	368	368	484	550	3	6	5280	13700	0.31	2.2	3.3	2.2	BT4-8023G/HA1VA919	265
FTWS0047	450	595	368	368	486	542	3	6	6800	16300	0.33	2	3	2	BT4B332773E/C725	285
FTWS0048	450	595	404	404	480	545	2	6	5940	16300	0.33	2	3	2	BT4-8044G/HA1VA902	305
FTWS0049	450	595	415	415	478	544	1.5	6	7040	19000	0.31	2.2	3.3	2.2	BT4-8024G/HA1	320
FTWS0050	457.2	596.9	279.4	276.225	484	550	1.5	3.3	4290	10000	0.48	1.4	2.1	1.4	BT4B328827ABG/HA1VA902	190
FTWS0051	457.2	596.9	279.4	276.225	484	550	1.5	3.3	4900	10000	0.48	1.4	2.1	1.4	BT4B328827E2/C500	190
FTWS1051	460	610	360	360	479	565	3	6	7500	16300	0.33	2	3	2	BT4B331977E/C725	290
FTWS0052	475	600	368	368	500	554	2	6	5720	16600	0.3	2.3	3.4	2.2	BT4B328913BG/HA1C555	250
FTWS0053	475	640	360	360	512	568	2	6	5500	15300	0.33	2	3	2	BT4-8035G/HA1	335
FTWS0054	479.425	679.45	495.3	495.3	520	610	3.3	6.4	10100	25500	0.33	2	3	2	BT4B330866CG/HA1	585
FTWS0055	479.425	679.45	495.3	495.3	520	610	3.3	6.4	9350	22400	0.33	2	3	2	BT4B334116BG/HA1VA901	565
FTWS0056	482.6	615.95	330.2	330.2	512	570	3.3	6.4	6300	15300	0.33	2	3	2	330641E/C725	240
FTWS0057	482.6	615.95	330.2	330.2	505	577	1	6.4	6100	13700	0.33	2	3	2	BT4B328842E1/C725	233
FTWS0058	482.6	615.95	330.2	330.2	505	577	1	6.4	6100	13700	0.33	2	3	2	BT4B328842E2/C725	233
FTWS0059	482.6	615.95	330.2	419.1	505	577	1	6.4	5280	13700	0.33	2	3	2	BT4B334072BG/HA1VA901	240
FTWS0060	482.6	615.95	330.2	419.1	505	577	1	6.4	5280	13700	0.33	2	3	2	BT4B334072BG/HA1VA903	240
FTWS0061	482.6	615.95	330.2	330.2	505	577	1	6.4	5280	13700	0.33	2	3	2	BT4B328842ABG/HA1VA902	230
FTWS0062	482.6	615.95	330.2	330.2	512	570	6.4	6.4	5500	15300	0.33	2	3	2	332096BG3	240
FTWS0063	482.6	615.95	330.2	419.1	512	570	3.5	6.4	5500	15300	0.33	2	3	2	BT4B331626BG/HA1	250
FTWS0064	482.6	615.95	420	420	505	577	2.8	4.4	5500	15300	0.33	2	3	2	BT4-8062G/HA1VA901	280
FTWS0065	482.6	635	421	421	512	578	3	6.4	7370	20400	0.33	2	3	2	BT4B334105BG/HA1	365
FTWS0066	489.026	634.873	320.675	320.675	522	584	3.3	3.3	6300	14600	0.35	1.9	2.9	1.8	331090E/C700	267
FTWS0067	489.026	634.873	320.675	320.675	516	588	2.5	3.3	5230	12500	0.37	1.8	2.7	1.8	BT4B334014AAG/HA1C300VA901	240
FTWS0068	501.65	711.2	520.7	520.7	550	655	3.3	6.4	8090	19600	0.33	2	3	2	BT4-8059G/HA1VA901	610
FTWS0069	510	655	379	377	539	602	1.5	6.4	7800	19000	0.33	2	3	2	BT4B331747E/C775	323
FTWS0070	514.35	673.1	422.275	422.275	537	606	3.3	6.4	6820	19000	0.33	2	3	2	BT4-8045G/HA1VA901	395
FTWS0071	514.35	673.1	422.275	422.275	545	614	3.3	6.4	7810	21600	0.31	2.2	3.3	2.2	331157BG	405
FTWS0072	530	680	440	440	558	624	1.5	3	8250	23600	0.33	2	3	2	BT4-8043G/HA1	405
FTWS0073	540	690	400	400	568	635	2	5	8150	21200	0.4	1.7	2.5	1.6	BT4-8108E/C625	364
FTWS0074	540	690	440	440	565	636	2	5	7480	21200	0.33	2	3	2	BT4-8038G/HA1VA901	395
FTWS0075	558.8	736.6	409.575	409.575	594	672	3.3	6.4	8250	22000	0.35	1.9	2.9	1.8	BT4B330993AG/HA1	480
FTWS0076	558.8	736.6	457.2	455.612	591	666	3.3	6.4	8580	23200	0.35	1.9	2.9	1.8	BT4-8022G/HA1VA919	515
FTWS1077	584.2	730.25	349.25	342.9	601	678	1.5	3.3	6800	17000	0.43	1.6	2.3	1.6	BT4B331189E/C600	327
FTWS0077	585.788	711.525	479.425	479.425	622	704	3.3	6.4	10600	30000	0.33	2	3	2	BT4B331093BG/HA1	620
FTWS0078	595.312	844.55	615.95	615.95	642	754	3.3	6.4	17300	39000	0.33	2	3	2	BT4B331300E/C775	1180
FTWS0079	609.6	787.4	361.95	361.95	645	735	3.3	6.4	7370	18600	0.37	1.8	2.7	1.8	BT4-8054G/HA1VA902	425
FTWS0080	620	800	363.5	363.5	655	740	2	6	7040	18000	0.37	1.8	2.7	1.8	BT4-8055G/HA1VA902	440
FTWS0081	625	815	480	480	656	746	3.2	6.5	13200	31000	0.33	2	3	2	BT4-8031E/C800	660
FTWS0082	650	1040	610	610	740	905	15	10	17600	36500	0.31	2.2	3.3	2.2	BT4-8036G/HA1	1970
FTWS0083	650	1040	610	610	730	905	15	10	17600	36500	0.31	2.2	3.3	2.2	BT4-8037G/HA1VA901	1970
FTWS0084	660	1070	648	648	760	960	6	10	19000	38000	0.31	2.2	3.3	2.2	BT4-8060G/HA4C300VA901	2260
FTWS0085	660.4	812.8	365.125	365.125	698	756	3.3	6.4	7210	22400	0.33	2	3	2	BT4B331190BG/HA1	415
FTWS0086	660.4	812.8	365.125	365.125	692	784	2	6.4	7210	20400	0.33	2	3	2	BT4B328977BG/HA1VA901	395
FTWS0087	679.45	901.7	552.45	552.45	722	824	3.3	6.4	13200	36000	0.33	2	3	2	BT4B334015BG/HA1VA901	970
FTWS0088	685.8	876	355.6	352.425	730	805	3.3	6.4	7810	22000	0.43	1.6	2.3	1.6	BT4B331089CG/HA1	525
FTWS0089	685.8	876.3	355.6	352.425	730	818	3.3	6.4	7650	20000	0.37	1.8	2.7	1.8	BT4B328955ABG/HA1VA902	505
FTWS0090	685.8	876.3	355.6	352.425	730	818	3.3	6.4	7650	20000	0.37	1.8	2.7	1.8	BT4B328955BG/HA1VA902	505
FTWS0091	710	900	410	410	750	835	3	6	9680	27000	0.35	1.9	2.9	1.8	BT4B331351BG/HA1	620
FTWS0092	750	950	410	410	800	878	3	6	10800	26500	0.37	1.8	2.7	1.8	BT4-8048E/C725	705
FTWS0093	762	1066.8	736.6	723.9	825	952	8.9	12.7	22000	58500	0.33	2	3	2	BT4B331907BG/HA4	2090

Four-Row Tapered Roller Bearings – Spacerless Design FTWS0001 FTWS0002 FTWS0003 FTWS0004 FTWS0005 BWK Bearing

Four-Row Tapered Roller Bearings – Spacerless Design

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