Thin Section Ball Bearings – Sealed-Four-Point Contact JHA-JG Series X-Type

The four-point contact ball bearing, capable of accommodating radial, axial, and moment loads, delivers high rigidity. Building on open-type constant-section bearings, its design integrates seal rings on both sides, optimizing lubrication, minimizing required grease volume, and providing effective dust protection.

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Thin Section Ball Bearings – Sealed-Four-Point Contact JHA-JG Series X-Type

Width Range: From 1/4″ (6.35mm) to 1″(25.4mm)

The four-point contact ball bearing is capable of accommodating three distinct load types (radial load, axial load, and moment [torque] load), thereby delivering enhanced rigidity. Building upon the design of open-type constant-section bearings, this configuration integrates seal rings onto both sides of the bearing unit. This structural innovation not only optimizes lubrication performance but also minimizes the required grease fill quantity. Additionally, the seal rings provide effective dust ingress protection, further enhancing operational reliability.

NJHA sealed four-point contact ball bearing sectional drawing thickness:6.35mm

◆NJHA SERIES
Part No	Dimension（inch/mm)			Basic Cap（N)				Weight	Interchange
	d	D	H	Cor	Cr	Coa	Ca	Kg	SILVER	KAYDON	SSB
NJHA10XP0	1.000	1.375	0.250	1290	670	3250	1650	0.016	JSHA10XL0	JHA10XL0	RJHA10XL0
	25.400	34.925	6.350
NJHA15XP0	1.500	1.875	0.250	1780	800	4450	2050	0.024	JSHA15XL0	JHA15XL0	RJHA15XL0
	38.100	47.625	6.350

JA Series X-Type Sealed 4-Point Contact Thin Section Bearings

NJA four-point contact thin section ball bearing sectinal drawing

NJA X-type Thin section ball bearing-cross section size 6.35mm

◆NJA SERIES
Part No	Dimension（inch/mm)			Basic Cap（N)				Weight	Interchange
	d	D	H	Cor	Cr	Coa	Ca	Kg	SILVER	KAYDON	SSB
NJA020XP0	2.000	2.500	0.250	3020	1420	7600	3510	0.045	JSA020XP0	JA020XP0	RJA020XP0
	50.800	63.500	6.350
NJA025XP0	2.500	3.000	0.250	3690	1600	9290	4050	0.054	JSA025XP0	JA025XP0	RJA025XP0
	63.500	76.200	6.350
NJA030XP0	3.000	3.500	0.250	4400	1820	10980	4490	0.064	JSA030XP0	JA030XP0	RJA030XP0
	76.200	88.900	6.350
NJA035XP0	3.500	4.000	0.250	5070	2000	12670	4930	0.077	JSA035XP0	JA035XP0	RJA035XP0
	88.900	101.600	6.350
NJA040XP0	4.000	4.500	0.250	5730	2130	14310	5380	0.086	JSA040XP0	JA040XP0	RJA040XP0
	101.600	114.300	6.350
NJA042XP0	4.250	4.750	0.250	6090	2220	15160	5600	0.091	JSA042XP0	JA042XP0	RJA042XP0
	107.950	120.650	6.350
NJA045XP0	4.500	5.000	0.250	6400	2310	16000	5820	0.095	JSA045XP0	JA045XP0	RJA045XP0
	114.300	127.000	6.350
NJA047XP0	4.750	5.250	0.250	6760	2400	16850	6000	0.100	JSA047XP0	JA047XP0	RJA047XP0
	120.650	133.350	6.350
NJA050XP0	5.000	5.500	0.250	7070	2490	17690	6220	0.104	JSA050XP0	JA050XP0	RJA050XP0
	127.000	139.700	6.350
NJA055XP0	5.500	6.000	0.250	7780	2620	19380	6580	0.113	JSA055XP0	JA055XP0	RJA055XP0
	139.700	152.400	6.350
NJA060XP0	6.000	6.500	0.250	8450	2800	21070	6980	0.127	JSA060XP0	JA060XP0	RJA060XP0
	152.400	165.100	6.350
NJA065XP0	6.500	7.000	0.250	9110	2930	22760	7330	0.136	JSA065XP0	JA065XP0	RJA065XP0
	165.100	177.800	6.350

JB Series X-Type Sealed 4-Point Contact Thin Section Bearings

JB series 4-point contact thin section ball bearing sectional drawing thickness:7.938mm

JB series sealed 4-point contact thin-walled bearing cross section size:7.938

◆NJB SERIES
Part No	Dimension（inch/mm)			Basic Cap（N)				Weight	Interchange
	d	D	H	Cor	Cr	Coa	Ca	Kg	SILVER	KAYDON	SSB
NJB020XP0	2.000	2.625	0.313	4130	2000	10400	5020	0.068	JSB020XP0	JB020XP0	RJB020XP0
	50.800	66.675	7.938
NJB025XP0	2.500	3.125	0.313	5070	2310	12620	5730	0.086	JSB025XP0	JB025XP0	RJB025XP0
	63.500	79.375	7.938
NJB030XP0	3.000	3.625	0.313	5960	2580	14890	6400	0.100	JSB030XP0	JB030XP0	RJB030XP0
	76.200	92.075	7.938
NJB035XP0	3.500	4.125	0.313	6850	2800	17160	7070	0.122	JSB035XP0	JB035XP0	RJB035XP0
	88.900	104.775	7.938
NJB040XP0	4.000	4.625	0.313	7780	3070	19430	7650	0.136	JSB040XP0	JB040XP0	RJB040XP0
	101.600	117.475	7.938
NJB042XP0	4.250	4.875	0.313	8130	3160	20310	7910	0.141	JSB042XP0	JB042XP0	RJB042XP0
	107.950	123.825	7.938
NJB045XP0	4.500	5.125	0.313	8670	3290	21690	8220	0.154	JSB045XP0	JB045XP0	RJB045XP0
	114.300	130.175	7.938
NJB047XP0	4.750	5.375	0.313	9020	3380	22580	8450	0.159	JSB047XP0	JB047XP0	RJB047XP0
	120.650	136.525	7.938
NJB050XP0	5.000	5.625	0.313	9560	3510	23910	8800	0.168	JSB050XP0	JB050XP0	RJB050XP0
	127.000	142.875	7.938
NJB055XP0	5.500	6.125	0.313	10490	3730	26180	9340	0.181	JSB055XP0	JB055XP0	RJB055XP0
	139.700	155.575	7.938
NJB060XP0	6.000	6.625	0.313	11380	3960	28450	9870	0.200	JSB060XP0	JB060XP0	RJB060XP0
	152.400	168.275	7.938
NJB065XP0	6.500	7.125	0.313	12270	4130	30720	10400	0.213	JSB065XP0	JB065XP0	RJB065XP0
	165.100	180.975	7.938

JG Series X-Type Sealed 4-Point Contact Thin Section Bearings

JG series sealed 4-point contact thin section bearing sectional drawing thickness:25.4mm

JG sereis X-type 4-point contact thin section ball bearing cross section size:1inch

◆NJG SERIES
Part No	Dimension（inch/mm)			Basic Cap（N)				Weight	Interchange
	d	D	H	Cor	Cr	Coa	Ca	Kg	SILVER	KAYDON	SSB
NJG120XP0	12.000	14.000	1.000	94860	37830	237140	94590	4.218	JSG120XP0	JG120XP0	RJG120XP0
	304.800	355.600	25.400
NJG140XP0	14.000	16.000	1.000	109440	41610	273630	152950	4.899	JSG140XP0	JG140XP0	RJG140XP0
	355.600	406.400	25.400
NJG160XP0	16.000	18.000	1.000	124060	45250	310130	113130	5.579	JSG160XP0	JG160XP0	RJG160XP0
	406.400	457.200	25.400
NJG180XP0	18.000	20.000	1.000	138640	48720	346620	121840	6.214	JSG180XP0	JG180XP0	RJG180XP0
	457.200	508.000	25.400
NJG200XP0	20.000	22.000	1.000	153220	52100	383070	130240	7.168	JSG200XP0	JG200XP0	RJG200XP0
	508.000	558.800	25.400

JU Series X-Type Sealed 4-Point Contact Thin Section Bearings

JU series sealed 4-point contact thin section bearing thickness:0.5mm

JU sereis 4-point contact thin section ball bearing cross section size:1/2inch

◆NJU SERIES
Part No	Dimension（inch/mm)			Basic Cap（N)				Weight	Interchange
	d	D	H	Cor	Cr	Coa	Ca	Kg	SILVER	KAYDON	INA
NJU040XP0	4.000	4.750	0.500	9340	3910	23380	9820	0.249	JSU040XP0	JU040XP0	CSXU040-2RS
	101.600	120.650	12.700
NJU042XP0	4.250	5.000	0.500	9870	4090	24710	10180	0.263	JSU042XP0	JU042XP0	CSXU042-2RS
	107.950	127.000	12.700
NJU045XP0	4.500	5.250	0.500	10400	4220	26050	10580	0.277	JSU045XP0	JU045XP0	CSXU045-2RS
	114.300	133.350	12.700
NJU047XP0	4.750	5.000	0.500	10940	4360	27380	10940	0.295	JSU047XP0	JU047XP0	CSXU047-2RS
	120.650	139.700	12.700
NJU050XP0	5.000	5.750	0.500	11510	4490	28720	11290	0.308	JSU050XP0	JU050XP0	CSXU050-2RS
	127.000	146.050	12.700
NJU055XP0	5.500	6.250	0.500	12580	4800	31380	11960	0.336	JSU055XP0	JU055XP0	CSXU055-2RS
	139.700	158.750	12.700
NJU060XP0	6.000	6.750	0.500	13650	5070	34050	12620	0.367	JSU060XP0	JU060XP0	CSXU060-2RS
	152.400	171.450	12.700
NJU065XP0	6.500	7.250	0.500	14710	5330	36760	13290	0.395	JSU065XP0	JU065XP0	CSXU065-2RS
	165.100	184.150	12.700
NJU070XP0	7.000	7.750	0.500	15780	5560	39430	13910	0.422	JSU070XP0	JU070XP0	CSXU070-2RS
	177.800	196.850	12.700
NJU075XP0	7.500	8.250	0.500	16850	5820	42090	14540	0.449	JSU075XP0	JU075XP0	CSXU075-2RS
	190.500	209.550	12.700
NJU080XP0	8.000	8.750	0.500	17910	6050	44760	15160	0.481	JSU080XP0	JU080XP0	CSXU080-2RS
	203.200	222.250	12.700
NJU090XP0	9.000	9.750	0.500	20050	6530	50100	16310	0.535	JSU090XP0	JU090XP0	CSXU090-2RS
	228.600	247.650	12.700
NJU100XP0	10.000	10.750	0.500	22180	6980	55430	17470	0.594	JSU100XP0	JU100XP0	CSXU100-2RS
	254.000	273.050	12.700
NJU110XP0	11.000	11.750	0.500	24310	7420	60810	18580	0.649	JSU110XP0	JU110XP0	CSXU110-2RS
	279.400	298.450	12.700
NJU120XP0	12.000	12.750	0.500	26450	7870	66140	19650	0.708	JSU120XP0	JU120XP0	CSXU120-2RS
	304.800	323.850	12.700