LYDL Equal Section Thin Section Four-Point Contact Ball Bearings Type X Technical Parameters

Model	d (in)	d (mm)	D (in)	D (mm)	B (in)	B (mm)	Weight (kg)	Radial Static Co (N)	Radial Dynamic Cr (N)	Thrust Static Co (N)	Thrust Dynamic Cr (N)	Limiting Speed (RPM)	Kaydon Equivalent	Silverthin Equivalent
LYDL-AA10	1.00	25.400	1.3750	34.925	0.1875	4.763	0.014	1,290	1,099	3,247	1,646	10,110	KAA10XL0	SAA10XL0
LYDL-AA15	1.50	38.100	1.8750	47.625	0.1875	4.763	0.018	1,779	1,317	4,448	2,046	7,110	KAA15XL0	SAA15XL0
LYDL-A020	2.00	50.800	2.5000	63.500	0.2500	6.350	0.045	3,025	2,286	7,606	3,514	5,330	KA020XP0	SA020XP0
LYDL-B020	2.00	50.800	2.6250	66.675	0.3125	7.938	0.073	4,137	3,372	10,409	5,026	5,190	KB020XP0	SB020XP0
LYDL-A025	2.50	63.500	3.0000	76.200	0.2500	6.350	0.059	3,692	2,593	9,297	4,048	4,360	KA025XP0	SA025XP0
LYDL-B025	2.50	63.500	3.1250	79.375	0.3125	7.938	0.091	5,071	3,772	12,633	5,738	4,270	KB025XP0	SB025XP0
LYDL-A030	3.00	76.200	3.5000	88.900	0.2500	6.350	0.068	4,404	2,375	6,539	4,493	3,690	KA030XP0	SA030XP0
LYDL-B030	3.00	76.200	3.6250	92.075	0.3125	7.938	0.109	5,961	4,150	14,902	6,405	3,620	KB030XP0	SB030XP0
LYDL-A035	3.50	88.900	4.0000	101.600	0.2500	6.350	0.082	5,071	3,118	8,229	4,938	3,200	KA035XP0	SA035XP0
LYDL-B035	3.50	88.900	4.1250	104.775	0.3125	7.938	0.122	6,850	4,510	17,170	7,073	3,150	KB035XP0	SB035XP0
LYDL-A040	4.00	101.600	4.5000	114.300	0.2500	6.350	0.086	5,738	3,363	14,323	5,382	2,820	KA040XP0	SA040XP0
LYDL-B040	4.00	101.600	4.6250	117.475	0.3125	7.938	0.136	7,784	4,853	19,439	7,651	2,780	KB040XP0	SB040XP0
LYDL-C040	4.00	101.600	4.7500	120.650	0.3750	9.525	0.204	9,341	6,303	23,398	9,831	2,740	KC040XP0	SC040XP0
LYDL-D040	4.00	101.600	5.0000	127.000	0.5000	12.700	0.354	13,701	10,280	34,251	15,658	2,670	KD040XP0	SD040XP0
LYDL-F040	4.00	101.600	5.5000	139.700	0.7500	19.050	0.862	23,842	20,751	59,606	30,381	2,530	KF040XP0	SF040XP0
LYDL-G040	4.00	101.600	6.0000	152.400	1.0000	25.400	1.633	36,520	35,492	91,278	50,087	2,400	KG040XP0	SG040XP0
LYDL-A042	4.25	107.950	4.7500	120.650	0.2500	6.350	0.091	6,094	3,483	15,168	5,605	2,670	KA042XP0	SA042XP0
LYDL-B042	4.25	107.950	4.8750	123.825	0.3125	7.938	0.141	8,140	4,982	20,328	7,918	2,630	KB042XP0	SB042XP0
LYDL-C042	4.25	107.950	5.0000	127.000	0.3750	9.525	0.213	9,875	6,512	24,732	10,186	2,590	KC042XP0	SC042XP0
LYDL-D042	4.25	107.950	5.2500	133.350	0.5000	12.700	0.376	14,190	10,476	35,497	16,014	2,530	KD042XP0	SD042XP0
LYDL-F042	4.25	107.950	5.7500	146.050	0.7500	19.050	0.907	25,088	21,329	62,764	31,449	2,400	KF042XP0	SF042XP0
LYDL-G042	4.25	107.950	6.2500	158.750	1.0000	25.400	1.724	36,520	35,217	91,278	50,087	2,290	KG042XP0	SG042XP0
LYDL-A045	4.50	114.300	5.0000	127.000	0.2500	6.350	0.100	6,405	3,599	16,014	5,827	2,530	KA045XP0	SA045XP0
LYDL-B045	4.50	114.300	5.1250	130.175	0.3125	7.938	0.150	8,674	5,182	21,707	8,229	2,490	KB045XP0	SB045XP0
LYDL-C045	4.50	114.300	5.2500	133.350	0.3750	9.525	0.218	10,409	6,269	26,067	10,587	2,460	KC045XP0	SC045XP0
LYDL-D045	4.50	114.300	5.5000	139.700	0.5000	12.700	0.399	15,213	10,916	37,810	16,770	2,400	KD045XP0	SD045XP0
LYDL-F045	4.50	114.300	6.0000	152.400	0.7500	19.050	0.953	26,378	21,899	65,878	32,472	2,290	KF045XP0	SF045XP0
LYDL-G045	4.50	114.300	6.5000	165.100	1.0000	25.400	1.841	38,966	36,498	97,372	52,267	2,180	KG045XP0	SG045XP0
LYDL-A047	4.75	120.650	5.2500	133.350	0.2500	6.350	0.104	6,761	3,710	16,859	6,005	2,400	KA047XP0	SA047XP0
LYDL-B047	4.75	120.650	5.3750	136.525	0.3125	7.938	0.154	9,030	5,307	22,597	8,452	2,370	KB047XP0	SB047XP0
LYDL-C047	4.75	120.650	5.5000	139.700	0.3750	9.525	0.227	10,943	6,921	27,401	10,943	2,340	KC047XP0	SC047XP0
LYDL-D047	4.75	120.650	5.7500	146.050	0.5000	12.700	0.426	15,702	11,103	39,322	17,170	2,290	KD047XP0	SD047XP0
LYDL-F047	4.75	120.650	6.2500	158.750	0.7500	19.050	0.998	27,623	22,455	69,036	33,495	2,180	KF047XP0	SF047XP0
LYDL-G047	4.75	120.650	6.7500	171.450	1.0000	25.400	1.860	41,368	37,752	103,466	54,402	2,090	KG047XP0	SG047XP0
LYDL-A050	5.00	127.000	5.5000	139.700	0.2500	6.350	0.109	7,073	3,821	17,704	6,228	2,290	KA050XP0	SA050XP0
LYDL-B050	5.00	127.000	5.6250	142.875	0.3125	7.938	0.172	9,564	5,498	23,931	8,807	2,260	KB050XP0	SB050XP0
LYDL-C050	5.00	127.000	5.7500	146.050	0.3750	9.525	0.263	11,521	7,117	28,736	11,298	2,230	KC050XP0	SC050XP0
LYDL-D050	5.00	127.000	6.0000	152.400	0.5000	12.700	0.454	16,725	11,530	41,858	17,882	2,180	KD050XP0	SD050XP0
LYDL-F050	5.00	127.000	6.5000	165.100	0.7500	19.050	1.043	28,869	23,006	72,150	34,518	2,090	KF050XP0	SF050XP0
LYDL-G050	5.00	127.000	7.0000	177.800	1.0000	25.400	1.950	43,815	38,975	109,515	56,537	2,000	KG050XP0	SG050XP0
LYDL-A055	5.50	139.700	6.0000	152.400	0.2500	6.350	0.113	7,784	4,039	19,394	6,583	2,090	KA055XP0	SA055XP0
LYDL-B055	5.50	139.700	6.1250	155.575	0.3125	7.938	0.186	10,498	5,800	26,200	9,341	2,060	KB055XP0	SB055XP0
LYDL-C055	5.50	139.700	6.2500	158.750	0.3750	9.525	0.268	12,588	7,504	31,404	11,966	2,040	KC055XP0	SC055XP0
LYDL-D055	5.50	139.700	6.5000	165.100	0.5000	12.700	0.481	18,238	12,121	45,639	18,949	2,000	KD055XP0	SD055XP0
LYDL-F055	5.50	139.700	7.0000	177.800	0.7500	19.050	1.134	31,360	24,087	78,422	36,475	1,920	KF055XP0	SF055XP0
LYDL-G055	5.50	139.700	7.5000	190.500	1.0000	25.400	2.132	46,262	39,941	115,609	58,628	1,850	KG055XP0	SG055XP0
LYDL-A060	6.00	152.400	6.5000	165.100	0.2500	6.350	0.127	8,452	4,248	21,085	6,984	1,920	KA060XP0	SA060XP0
LYDL-B060	6.00	152.400	6.6250	168.275	0.3125	7.938	0.200	11,387	6,099	28,469	9,875	1,900	KB060XP0	SB060XP0
LYDL-C060	6.00	152.400	6.7500	171.450	0.3750	9.525	0.286	13,656	7,873	34,073	12,633	1,880	KC060XP0	SC060XP0
LYDL-D060	6.00	152.400	7.0000	177.800	0.5000	12.700	0.526	19,795	12,700	49,464	19,973	1,850	KD060XP0	SD060XP0
LYDL-F060	6.00	152.400	7.5000	190.500	0.7500	19.050	1.225	33,895	25,137	84,739	38,388	1,780	KF060XP0	SF060XP0
LYDL-G060	6.00	152.400	8.0000	203.200	1.0000	25.400	2.313	51,110	42,271	127,797	62,675	1,710	KG060XP0	SG060XP0
LYDL-A065	6.50	165.100	7.0000	177.800	0.2500	6.350	0.136	9,119	4,453	22,775	7,340	1,780	KA065XP0	SA065XP0
LYDL-B065	6.50	165.100	7.1250	180.975	0.3125	7.938	0.213	12,277	6,383	30,737	10,409	1,760	KB065XP0	SB065XP0
LYDL-C065	6.50	165.100	7.2500	184.150	0.3750	9.525	0.308	14,724	8,234	36,787	13,300	1,750	KC065XP0	SC065XP0
LYDL-D065	6.50	165.100	7.5000	190.500	0.5000	12.700	0.553	21,307	13,256	53,245	20,996	1,710	KD065XP0	SD065XP0
LYDL-F065	6.50	165.100	8.0000	203.200	0.7500	19.050	1.315	36,386	26,156	91,011	40,256	1,660	KF065XP0	SF065XP0
LYDL-G065	6.50	165.100	8.5000	215.900	1.0000	25.400	2.449	53,557	43,206	133,891	64,633	1,600	KG065XP0	SG065XP0
LYDL-A070	7.00	177.800	7.5000	190.500	0.2500	6.350	0.141	9,786	4,653	24,465	7,695	1,660	KA070XP0	SA070XP0
LYDL-B070	7.00	177.800	7.6250	193.675	0.3125	7.938	0.227	13,211	6,663	33,006	10,898	1,640	KB070XP0	SB070XP0
LYDL-C070	7.00	177.800	7.7500	196.850	0.3750	9.525	0.331	15,791	8,590	39,456	13,923	1,630	KC070XP0	SC070XP0
LYDL-D070	7.00	177.800	8.0000	203.200	0.5000	12.700	0.594	22,819	13,803	57,071	21,974	1,600	KD070XP0	SD070XP0
LYDL-F070	7.00	177.800	8.5000	215.900	0.7500	19.050	1.451	33,139	27,147	97,283	42,080	1,550	KF070XP0	SF070XP0
LYDL-G070	7.00	177.800	9.0000	228.600	1.0000	25.400	2.631	58,405	45,407	146,035	68,503	1,500	KG070XP0	SG070XP0
LYDL-A075	7.50	190.500	8.0000	203.200	0.2500	6.350	0.154	10,453	4,844	26,156	8,051	1,550	KA075XP0	SA075XP0
LYDL-B075	7.50	190.500	8.1250	206.375	0.3125	7.938	0.240	14,101	6,935	35,230	11,387	1,540	KB075XP0	SB075XP0
LYDL-C075	7.50	190.500	8.2500	209.550	0.3750	9.525	0.354	16,859	8,928	42,125	14,546	1,520	KC075XP0	SC075XP0
LYDL-D075	7.50	190.500	8.5000	215.900	0.5000	12.700	0.640	24,332	14,332	60,852	22,953	1,500	KD075XP0	SD075XP0
LYDL-F075	7.50	190.500	9.0000	228.600	0.7500	19.050	1.542	41,413	28,126	103,555	43,904	1,450	KF075XP0	SF075XP0
LYDL-G075	7.50	190.500	9.5000	241.300	1.0000	25.400	2.767	60,852	46,306	152,129	70,371	1,410	KG075XP0	SG075XP0
LYDL-A080	8.00	203.200	8.5000	215.900	0.2500	6.350	0.172	11,121	5,031	27,846	8,407	1,450	KA080XP0	SA080XP0
LYDL-B080	8.00	203.200	8.6250	219.075	0.3125	7.938	0.259	14,991	7,197	37,499	11,877	1,440	KB080XP0	SB080XP0
LYDL-C080	8.00	203.200	8.7500	222.250	0.3750	9.525	0.381	17,926	9,261	44,794	15,168	1,430	KC080XP0	SC080XP0
LYDL-D080	8.00	203.200	9.0000	228.600	0.5000	12.700	0.694	25,840	14,848	64,677	23,887	1,410	KD080XP0	SD080XP0
LYDL-F080	8.00	203.200	9.5000	241.300	0.7500	19.050	1.588	43,948	29,069	109,827	45,639	1,370	KF080XP0	SF080XP0
LYDL-G080	8.00	203.200	10.0000	254.000	1.0000	25.400	2.948	65,700	48,406	164,317	74,063	1,330	KG080XP0	SG080XP0
LYDL-A090	9.00	228.600	9.5000	241.300	0.2500	6.350	0.200	12,500	5,391	31,227	9,074	1,300	KA090XP0	SA090XP0
LYDL-B090	9.00	228.600	9.6250	244.475	0.3125	7.938	0.299	16,814	7,704	42,036	12,811	1,290	KB090XP0	SB090XP0
LYDL-C090	9.00	228.600	9.7500	247.650	0.3750	9.525	0.426	20,061	9,902	50,131	16,325	1,280	KC090XP0	SC090XP0
LYDL-D090	9.00	228.600	10.0000	254.000	0.5000	12.700	0.780	28,913	15,840	72,284	25,755	1,260	KD090XP0	SD090XP0
LYDL-F090	9.00	228.600	10.5000	266.700	0.7500	19.050	1.769	48,930	30,902	122,371	49,064	1,230	KF090XP0	SF090XP0
LYDL-G090	9.00	228.600	11.0000	279.400	1.0000	25.400	3.266	73,040	51,270	182,555	79,490	1,200	KG090XP0	SG090XP0
LYDL-A100	10.00	254.000	10.5000	266.700	0.2500	6.350	0.227	13,834	5,734	34,607	9,697	1,170	KA100XP0	SA100XP0
LYDL-B100	10.00	254.000	10.6250	269.875	0.3125	7.938	0.331	18,638	8,189	46,528	13,701	1,160	KB100XP0	SB100XP0
LYDL-C100	10.00	254.000	10.7500	273.050	0.3750	9.525	0.481	22,197	10,516	55,469	17,482	1,160	KC100XP0	SC100XP0
LYDL-D100	10.00	254.000	11.0000	279.400	0.5000	12.700	0.853	31,938	16,796	79,890	27,534	1,140	KD100XP0	SD100XP0
LYDL-F100	10.00	254.000	11.5000	292.100	0.7500	19.050	1.950	53,957	32,659	134,915	52,356	1,120	KF100XP0	SF100XP0
LYDL-G100	10.00	254.000	12.0000	304.800	1.0000	25.400	3.583	80,335	54,033	200,793	84,694	1,090	KG100XP0	SG100XP0
LYDL-A110	11.00	279.400	11.5000	292.100	0.2500	6.350	0.236	15,168	6,058	37,988	10,320	1,070	KA110XP0	SA110XP0
LYDL-B110	11.00	279.400	11.6250	295.275	0.3125	7.938	0.340	20,417	8,652	51,066	14,590	1,060	KB110XP0	SB110XP0
LYDL-C110	11.00	279.400	11.7500	298.450	0.3750	9.525	0.526	24,332	11,103	60,852	18,594	1,050	KC110XP0	SC110XP0
LYDL-D110	11.00	279.400	12.0000	304.800	0.5000	12.700	0.934	35,008	17,708	87,497	29,225	1,040	KD110XP0	SD110XP0
LYDL-F110	11.00	279.400	12.5000	317.500	0.7500	19.050	2.177	58,983	34,345	147,459	55,558	1,020	KF110XP0	SF110XP0
LYDL-G110	11.00	279.400	13.0000	330.200	1.0000	25.400	3.901	87,630	65,562	219,075	89,765	1,000	KG110XP0	SG110XP0
LYDL-A120	12.00	304.800	12.5000	317.500	0.2500	6.350	0.254	16,547	6,374	41,368	10,898	980	KA120XP0	SA120XP0
LYDL-B120	12.00	304.800	12.6250	320.675	0.3125	7.938	0.376	22,241	9,097	55,603	15,435	970	KB120XP0	SB120XP0
LYDL-C120	12.00	304.800	12.7500	323.850	0.3750	9.525	0.567	26,467	11,663	66,190	19,661	970	KC120XP0	SC120XP0
LYDL-D120	12.00	304.800	13.0000	330.200	0.5000	12.700	1.021	38,032	18,585	95,103	30,915	960	KD120XP0	SD120XP0
LYDL-F120	12.00	304.800	13.5000	342.900	0.7500	19.050	2.359	64,010	35,959	160,003	58,672	940	KF120XP0	SF120XP0
LYDL-G120	12.00	304.800	14.0000	355.600	1.0000	25.400	4.218	94,925	59,228	237,313	94,658	920	KG120XP0	SG120XP0
LYDL-B140	14.00	355.600	14.6250	371.475	0.3125	7.938	0.476	25,844	9,937	68,066	17,081	840	KB140XP0	SB140XP0
LYDL-C140	14.00	355.600	14.7500	374.650	0.3750	9.525	0.689	30,737	12,731	76,865	21,752	830	KC140XP0	SC140XP0
LYDL-D140	14.00	355.600	15.0000	381.000	0.5000	12.700	1.238	44,126	20,244	110,316	34,118	830	KD140XP0	SD140XP0
LYDL-F140	14.00	355.600	15.5000	393.700	0.7500	19.050	2.722	74,063	39,033	185,135	64,633	810	KF140XP0	SF140XP0
LYDL-G140	14.00	355.600	16.0000	406.400	1.0000	25.400	4.899	109,515	64,072	273,833	104,133	800	KG140XP0	SG140XP0
LYDL-B160	16.00	406.400	16.6250	422.275	0.3125	7.938	0.544	29,447	10,720	73,663	18,638	740	KB160XP0	SB160XP0
LYDL-C160	16.00	406.400	16.7500	425.450	0.3750	9.525	0.785	35,052	13,727	87,585	23,709	730	KC160XP0	SC160XP0
LYDL-D160	16.00	406.400	17.0000	431.800	0.5000	12.700	1.406	50,220	21,792	125,440	37,187	730	KD160XP0	SD160XP0
LYDL-F160	16.00	406.400	17.5000	444.500	0.7500	19.050	3.221	84,071	41,907	210,223	70,371	720	KF160XP0	SF160XP0
LYDL-G160	16.00	406.400	18.0000	457.200	1.0000	25.400	5.579	124,150	68,614	310,352	113,207	710	KG160XP0	SG160XP0
LYDL-B180	18.00	457.200	18.6250	473.075	0.3125	7.938	0.612	33,095	11,459	82,692	20,106	660	KB180XP0	SB180XP0
LYDL-C180	18.00	457.200	18.7500	476.250	0.3750	9.525	0.880	39,322	14,657	98,261	25,622	650	KC180XP0	SC180XP0
LYDL-D180	18.00	457.200	19.0000	482.600	0.5000	12.700	1.579	56,270	23,246	140,742	40,167	650	KD180XP0	SD180XP0
LYDL-F180	18.00	457.200	19.5000	495.300	0.7500	19.050	3.583	94,124	44,607	235,311	75,887	640	KF180XP0	SF180XP0
LYDL-G180	18.00	457.200	20.0000	508.000	1.0000	25.400	6.214	138,740	72,889	346,872	121,926	630	KG180XP0	SG180XP0
LYDL-B200	20.00	508.000	20.6250	523.875	0.3125	7.938	0.680	36,698	12,148	91,722	21,574	590	KB200XP0	SB200XP0
LYDL-C200	20.00	508.000	20.7500	527.050	0.3750	9.525	0.980	43,593	15,533	108,981	27,446	590	KC200XP0	SC200XP0
LYDL-D200	20.00	508.000	21.0000	533.400	0.5000	12.700	1.746	62,364	24,616	155,955	43,014	590	KD200XP0	SD200XP0
LYDL-F200	20.00	508.000	21.5000	546.100	0.7500	19.050	4.037	104,177	47,160	260,221	81,180	580	KF200XP0	SF200XP0
LYDL-G200	20.00	508.000	22.0000	558.800	1.0000	25.400	7.167	153,330	76,923	383,348	130,333	570	KG200XP0	SG200XP0
LYDL-C250	25.00	635.000	25.7500	654.050	0.3750	9.525	1.220	54,268	17,530	135,715	31,760	470	KC250XP0	SC250XP0
LYDL-D250	25.00	635.000	26.0000	660.400	0.5000	12.700	2.173	77,577	27,735	193,987	49,731	470	KD250XP0	SD250XP0
LYDL-F250	25.00	635.000	26.5000	673.100	0.7500	19.050	4.944	129,265	52,974	323,163	93,724	470	KF250XP0	SF250XP0
LYDL-G250	25.00	635.000	27.0000	685.800	1.0000	25.400	8.845	189,850	86,118	474,625	150,261	460	KG250XP0	SG250XP0
LYDL-C300	30.00	762.000	30.7500	781.050	0.3750	9.525	1.456	64,989	19,296	162,449	35,808	400	KC300XP0	SC300XP0
LYDL-D300	30.00	762.000	31.0000	787.400	0.5000	12.700	2.599	92,790	30,497	232,019	56,048	390	KD300XP0	SD300XP0
LYDL-F300	30.00	762.000	31.5000	800.100	0.7500	19.050	5.897	154,353	58,116	385,928	105,512	390	KF300XP0	SF300XP0
LYDL-G300	30.00	762.000	32.0000	812.800	1.0000	25.400	10.569	226,370	94,302	565,814	168,943	390	KG300XP0	SG300XP0
LYDL-F350	35.00	889.000	36.5000	927.100	0.7500	19.050	6.849	179,486	62,720	448,826	116,632	340	KF350XP0	SF350XP0
LYDL-G350	35.00	889.000	37.0000	939.800	1.0000	25.400	12.292	262,890	101,620	657,002	186,692	330	KG350XP0	SG350XP0
LYDL-F400	40.00	1016.000	41.5000	1054.100	0.7500	19.050	7.802	204,574	66,875	511,546	127,308	290	KF400XP0	SF400XP0
LYDL-G400	40.00	1016.000	42.0000	1066.800	1.0000	25.400	13.971	299,410	108,234	748,636	203,595	290	KG400XP0	SG400XP0

Note: Kaydon® and Silverthin® part numbers are used for interchange reference only. LYDL manufactures compatible equal section thin section four-point contact ball bearings according to customer drawings, dimensions, load requirements, and application conditions. Kaydon® and Silverthin® are registered trademarks of their respective owners.

Equal Section Thin Section Four-Point Contact Ball Bearings Type X

Product Overview

LYDL Equal Section Thin Section Four-Point Contact Ball Bearings, also known as Type X thin section bearings, are precision thin section bearings designed for compact rotary systems requiring combined load capacity in a limited installation space. This series features a constant cross-section structure. As the bore diameter increases, the bearing cross section remains nearly constant within the same series. This design helps reduce equipment weight, save radial installation space, and simplify compact rotary mechanisms. The key advantage of Type X four-point contact thin section bearings is their ability to support radial load, axial load in both directions, and moment load in a single bearing position. Compared with radial contact thin section bearings, Type X bearings offer stronger combined load capability. Compared with angular contact thin section bearings, Type X bearings can often reduce the need for a matched pair when the application requires bidirectional axial load support in a compact structure. LYDL Type X thin section bearings are widely used in robotics, precision rotary tables, radar antennas, optical systems, aerospace mechanisms, medical equipment, semiconductor machinery, rotary encoders, measuring instruments, inspection systems, and automation equipment. LYDL manufactures compatible equal section thin section four-point contact ball bearings according to customer drawings, samples, application requirements, and interchange part numbers. Custom options are available for material, precision grade, clearance, preload, lubrication, cage type, packaging, and special working conditions.

Product Brief

1. Equal Section Thin Section Four-Point Contact Ball Bearings, also known as Type X thin section bearings, feature a constant cross-section four-point contact ball bearing structure designed for compact rotary systems with combined radial, axial, and moment loads.
2. Sizes: Bore Diameter: 25.4–1016 mm / 1–40 inch, suitable for lightweight rotary structures, robot joints, precision turntables, optical systems, radar antennas, and automation equipment.
3. Performance Advantages: Compact structure; low weight; supports radial load, axial load in both directions, and moment load in a single bearing; space-saving design; smooth rotation; simplified bearing arrangement.
4. Material: 52100, SUJ2, 100Cr6, 100CrMn6, GCr15SiMn, GCr15 Bearing Steel.
5. Applications: Robotics, precision rotary tables, radar antennas, optical tracking systems, aerospace mechanisms, medical equipment, semiconductor equipment, rotary encoders, measuring systems, inspection equipment, and automation machinery.
6. Accuracy: P0, P6, P5, P4; customized clearance, preload, lubrication, cage type, material, and precision grade are available according to drawings and application requirements.

Structural Features

Constant Cross-Section Design

The main feature of this series is the equal section structure. Within the same bearing series, the cross section remains nearly constant while the bore diameter increases. This allows engineers to design large hollow shafts, lightweight rotary platforms, and compact mechanical structures without significantly increasing bearing size or weight.

Four-Point Contact Raceway Structure

Type X thin section bearings use a four-point contact raceway structure. The raceway geometry allows the bearing to contact the balls at four points under load, enabling one bearing to support radial load, axial load in both directions, and moment load under suitable operating conditions.

Combined Load Capacity in One Bearing

Unlike radial contact bearings, which are mainly designed for radial loads, and angular contact bearings, which mainly support axial load in one direction, four-point contact bearings are designed for combined load applications. This makes Type X bearings suitable for compact mechanisms where using two bearings is not practical.

Space-Saving Bearing Arrangement

In many designs, a Type X bearing can help simplify the bearing arrangement by reducing the need for paired angular contact bearings. This can save installation space, reduce component quantity, and simplify assembly structure.

Lightweight and Compact

The thin section design helps reduce equipment weight and save radial space. This makes Type X bearings especially useful in aerospace mechanisms, optical systems, radar antennas, medical equipment, and robotic joints where weight and space are important design factors.

Smooth Rotation and Controlled Clearance

With precision raceway grinding, high-quality balls, and controlled internal clearance or preload, LYDL Type X thin section bearings can provide smooth rotation, stable running performance, and reliable positioning accuracy.

Custom Manufacturing Options

LYDL can customize Type X thin section bearings according to drawings or application requirements, including dimensions, material, cage type, lubrication, precision grade, clearance, preload, packaging, and special marking.

Difference Between Type X, Type C, and Type A Thin Section Bearings

Type X, Type C, and Type A thin section bearings have different internal structures and application priorities. Selecting the correct type is important for bearing performance and service life.

Item	Type X Four-Point Contact	Type C Radial Contact	Type A Angular Contact
Main Load Direction	Radial load, axial load in both directions, and moment load	Mainly radial load	Radial load and axial load in one direction
Axial Load Capacity	Good bidirectional axial load capacity	Limited axial load capacity	Good one-direction axial load capacity
Moment Load Capacity	Better than Type C in compact single-bearing arrangements	Limited	Good when used as matched pairs
Bearing Arrangement	Often suitable as a single bearing in compact structures	Usually used for radial support	Often used as a matched pair
Rigidity	Suitable for combined load and compact rigidity requirements	Suitable for smooth rotation and moderate radial stiffness	Suitable for higher axial stiffness and preload control
Friction Torque	Moderate, depending on clearance and preload	Usually lower	May be higher when preloaded
Typical Use	Robot joints, rotary tables, optical systems, radar antennas, compact rotary modules	Encoders, instruments, automation, light rotary mechanisms	Precision rotary axes, matched pair systems, high axial stiffness applications
Selection Priority	Choose when one bearing must support combined loads	Choose when radial load and low torque are most important	Choose when axial stiffness and paired preload are required

Technical Parameters Table

The technical parameter table should be placed below this section. The table can include common LYDL equal section thin section four-point contact ball bearing models, bore diameter, outside diameter, width, weight, load ratings, limiting speed, and interchange references. Recommended Table Title: LYDL Equal Section Thin Section Four-Point Contact Ball Bearings Type X Technical Parameters Recommended Table Columns: Model | d in | d mm | D in | D mm | B in | B mm | Weight kg | Radial Static Co N | Radial Dynamic Cr N | Thrust Static Co N | Thrust Dynamic Cr N | Limiting Speed RPM | Kaydon Equivalent | Silverthin Equivalent Please insert the full technical parameter table here.

Typical Applications

LYDL equal section thin section four-point contact ball bearings are suitable for compact rotary systems requiring combined load capacity, lightweight structure, and reliable rotational performance. Typical applications include: Robotics and robot joints Precision rotary tables Radar and antenna systems Optical tracking systems Aerospace mechanisms Medical imaging equipment Semiconductor equipment Rotary encoders Measuring instruments Inspection equipment Precision gimbals Automation machinery Lightweight rotary platforms Positioning systems Compact slewing mechanisms Defense and industrial rotary systems For applications where radial load, axial load in both directions, and moment load must be supported in a compact bearing position, Type X four-point contact thin section bearings are often a practical choice.

Selection Guide

Selecting the correct Type X thin section bearing depends on load direction, moment load, installation space, rigidity requirement, speed, precision grade, clearance or preload, lubrication method, and operating environment.

Choose Type X for Combined Loads

Type X four-point contact thin section bearings are recommended when the application requires one bearing to support radial load, axial load in both directions, and moment load. This is especially useful in compact rotary mechanisms where two bearings cannot be installed.

Choose Type C for Mainly Radial Loads

If the application mainly carries radial load and requires low friction torque and smooth rotation, radial contact Type C thin section bearings may be more suitable than Type X bearings.

Choose Type A for High Axial Stiffness and Matched Pair Mounting

If the application requires controlled preload, high axial stiffness, or a paired bearing arrangement, angular contact Type A thin section bearings are usually recommended. Type A bearings are especially suitable when two bearings can be mounted as a matched pair.

Check Moment Load Requirements

For robot joints, radar antennas, optical platforms, and rotary tables, moment load is often an important factor. Type X bearings can support moment load in compact structures, but the final model should be selected according to load value, bearing size, speed, and required life.

Consider Clearance and Preload

Clearance and preload affect bearing stiffness, friction torque, temperature rise, and service life. For precision positioning applications, light preload may improve rigidity. For higher speed or low-torque applications, suitable clearance should be selected carefully.

Consider Speed and Lubrication

For high-speed operation, lubrication, cage design, internal clearance, preload, installation accuracy, and heat dissipation should be checked. Excessive preload may increase friction torque and operating temperature.

Confirm Precision Grade

For general automation applications, standard precision may be sufficient. For robotics, optical systems, radar antennas, measuring equipment, and precision rotary tables, P5 or P4 accuracy can be selected according to the required running accuracy.

Provide Application Data for Accurate Selection

To recommend the correct Type X bearing model, please provide the bearing model or drawing, bore diameter, outside diameter, width, radial load, axial load, moment load, speed, precision grade, clearance or preload requirement, lubrication method, and working environment.

Interchange Reference

LYDL manufactures compatible equal section thin section four-point contact ball bearings according to customer drawings, samples, or interchange part numbers. The models in this series can be used as replacement reference for common Type X four-point contact thin section bearing series. Common interchange reference series include: KA Series Four-Point Contact Thin Section Bearings KB Series Four-Point Contact Thin Section Bearings KC Series Four-Point Contact Thin Section Bearings KD Series Four-Point Contact Thin Section Bearings KF Series Four-Point Contact Thin Section Bearings KG Series Four-Point Contact Thin Section Bearings Note: Kaydon® and Silverthin® part numbers are used for interchange reference only. LYDL manufactures compatible thin section four-point contact ball bearings according to customer drawings, dimensions, load requirements, and application conditions. Kaydon® and Silverthin® are registered trademarks of their respective owners.

Quality Assurance

LYDL controls the quality of equal section thin section four-point contact ball bearings through material inspection, precision machining, heat treatment, raceway grinding, dimensional measurement, clearance or preload control, assembly inspection, and final running tests. Key inspection items can include: Material inspection Hardness inspection Dimensional accuracy inspection Raceway surface quality inspection Roundness and runout inspection Internal clearance or preload verification Rotational torque inspection Noise and vibration inspection Appearance inspection Anti-rust and packaging inspection For precision applications, LYDL can provide P5 and P4 grade bearings with stricter dimensional control, improved running accuracy, and stable rotational performance. Inspection reports can be provided according to customer requirements.

Manufacturing Process

LYDL follows a controlled manufacturing process to ensure stable quality and reliable bearing performance. Typical manufacturing process: Raw material inspection Forging or ring blank preparation Precision turning Heat treatment and stabilization Precision grinding Four-point raceway grinding Raceway superfinishing Cleaning and demagnetization Ball and cage preparation Bearing assembly Clearance or preload inspection Lubrication Running test Final inspection Anti-rust treatment Packaging and shipment Each process is controlled to help ensure accurate dimensions, smooth raceway surface, stable combined load performance, and reliable service life.

Installation & Maintenance

Correct installation is important for the performance and service life of Type X four-point contact thin section bearings. Improper installation, excessive fitting force, contamination, misalignment, or incorrect preload may affect bearing accuracy and cause abnormal torque, noise, temperature rise, or early failure.

Installation Recommendations

Keep the bearing, shaft, housing, and installation tools clean. Check shaft and housing accuracy before installation. Avoid direct impact on the bearing rings. Apply force only to the ring being fitted. Avoid misalignment during installation. Confirm the bearing mounting direction and fitting method. Do not apply excessive preload unless confirmed by the design. Tighten mounting components evenly when required. Rotate the bearing slowly after installation to check smooth running.

Maintenance Recommendations

Use suitable lubrication according to speed, temperature, load, and working environment. Avoid dust, metal chips, moisture, and other contamination. Check running torque, noise, and temperature during operation. Avoid excessive impact load and overload. For long-term storage, keep the bearing sealed, dry, and protected from corrosion. For precision rotary applications, installation accuracy, shaft and housing rigidity, and clearance or preload control are especially important.

Packaging & Shipping

LYDL provides protective packaging suitable for domestic and export shipment. Bearings are treated with anti-rust protection and packed according to size, precision grade, shipping method, and customer requirements. Packaging options include: Anti-rust oil or anti-rust film Plastic bag or vacuum packaging Individual box packaging Foam or shockproof protection Export carton Wooden case for large-size bearings Neutral packaging LYDL brand packaging Customized label and marking Shipping methods include: Express delivery Air freight Sea freight Railway shipment Customer-designated forwarder Customized packaging, private label, barcode label, model marking, and customer-required shipping marks are available.

FAQ

What is a Type X thin section bearing?

A Type X thin section bearing is a four-point contact thin section ball bearing designed to support radial load, axial load in both directions, and moment load in a compact bearing position.

What is the main advantage of Type X four-point contact bearings?

The main advantage is combined load capacity. One Type X bearing can support radial load, bidirectional axial load, and moment load, which helps simplify compact rotary designs.

What is the difference between Type X and Type C thin section bearings?

Type C radial contact bearings are mainly used for radial loads and low friction rotation. Type X four-point contact bearings are better for combined radial, axial, and moment loads.

What is the difference between Type X and Type A thin section bearings?

Type A angular contact bearings mainly support axial load in one direction and are often used as matched pairs. Type X bearings can support axial load in both directions in a single bearing position under suitable conditions.

Can Type X bearings replace two angular contact bearings?

In some compact applications, a Type X bearing can reduce the need for a matched pair arrangement. However, if the system requires very high axial stiffness or special preload control, matched angular contact bearings may still be more suitable.

When should I choose Type X thin section bearings?

Type X bearings are recommended when the application requires compact structure, combined load capacity, bidirectional axial load support, and moment load resistance in one bearing position.

What materials are available?

LYDL can manufacture this series using 52100, SUJ2, 100Cr6, 100CrMn6, GCr15SiMn, and GCr15 bearing steel according to customer requirements.

What precision grades are available?

Available precision grades include P0, P6, P5, and P4. Customized precision, clearance, preload, and running accuracy requirements can be discussed according to the application.

Can LYDL manufacture bearings according to Kaydon or Silverthin interchange part numbers?

Yes. LYDL can manufacture compatible thin section four-point contact ball bearings according to drawings, samples, or interchange part numbers. These part numbers are used only as reference for dimensions and replacement selection.

What information is needed for quotation?

Please provide the bearing model, interchange part number, drawing, quantity, precision grade, clearance or preload requirement, material, lubrication requirement, load conditions, speed, and application environment.

Request a Quote

Looking for equal section thin section four-point contact ball bearings for robotics, rotary tables, radar antennas, optical systems, medical devices, aerospace mechanisms, or automation equipment? LYDL can provide standard and customized Type X thin section four-point contact ball bearings according to your drawings, samples, or interchange part numbers. Please send us the following information for a fast quotation: Bearing model or interchange part number Required quantity Drawing or installation dimensions Precision grade Material requirement Clearance or preload requirement Radial load, axial load, and moment load Speed and working conditions Lubrication requirement Application environment Packaging and marking requirements Contact LYDL today to get technical support, model selection assistance, and a competitive quotation for equal section thin section four-point contact ball bearings.