Four Point Contact Ball Bearings

QJ
QJ...N2

Send inquiry

Product Catalog Download

Design Variants

Misalignment

Cage

Tolerance

Internal clearance

To allow the bearings to accept the maximum number of balls, four point contact ball bearings are designed with split inner ring or with split outer ring so these bearings have two basic types, one is featured two half inner ring (QJ series), an other is featured two half outer ring (Q series).

图片1.png

DHK four point contact ball bearings have the contact angle of 35 .

DHK four point contact ball bearings mainly produce QJ series. DHK can provide Q series bearings on request.

DHK four point contact ball bearings with outer ring diameters of more than 160mm are produced with two locating slots in their outer ring (suffix N2), DHK can also provide small size of outer diameter within 160mm with locating slots.

To allow the bearings to accept the maximum number of balls, four point contact ball bearings are designed with split inner ring or with split outer ring so these bearings have two basic types, one is featured two half inner ring (QJ series), an other is featured two half outer ring (Q series).

DHK four point contact ball bearings have the contact angle of 35 .
DHK four point contact ball bearings mainly produce QJ series. DHK can provide Q series bearings on request.
DHK four point contact ball bearings with outer ring diameters of more than 160mm are produced with two locating slots in their outer ring (suffix N2), DHK can also provide small size of outer diameter within 160mm with locating slots.
DHK four point contact ball bearings are fitted with outer ring centred solid brass cage (suffix MPA) as standard.

DHK four point contact ball bearings are produced to the normal tolerance class (PN) as standard.

Other tolerance classes such as P6 or P5 are available on request.

Detailed values are listed in chapter of tolerance of radial bearings, page 8 .

Tolerances for DHK four point contact ball bearings (excluding tapered roller bearings)

All dimensions shown in (mm):

Tolerances in (um):

Inner Ring

PN/(Normal)

Nominal Bore diameter		Deviation dmp	Variation Vdp Series			Variation Vdmp	Taper bore 1:12 Deviation/ Variation
>	<=	△dmp	7．8．9	0．1	2．3．4	Vdmp	△dmp	△d1mp-dmp	Vdp
2.5 10		0 -8	10	8	6	6	+15 0	+15 0	10
10 18		0 -8	10	8	6	6	+18 0	+18 0	10
18 30		0 -10	13	10	8	8	+21 0	+21 0	13
30 50		0 -12	15	12	9	9	+25 0	+25 0	15
50 80		0 -15	19	19	11	11	+30 0	+30 0	19
80 120		0 -20	25	25	15	15	+35 0	+35 0	25
120 180		0 -25	31	31	19	19	+40 0	+40 0	31
180 250		0 -30	38	38	23	23	+46 0	+46 0	38
250 315		0 -35	44	44	26	26	+52 0	+52 0	44
315 400		0 -40	50	50	30	30	+57 0	+57 0	50
400 500		0 -45	56	56	34	34	+63 0	+63 0	56
500 630		0 -50	63	63	38	38	+70 0	+70 0
630 800		0 -75					+80 0	+80 0
800 1000		0 -100					+90 0	+90 0
1000 1250		0 -125					+105 0	+105 0
1250 1600		0 -160
1600 2000		0 -200

Outer ring

PN/(Normal)

Nominal Outer diameter		Deviation	Variation Vdp Series			Sealed bearing	Variation	Radial runout
>	<=	△Dmp	7．8．9	0．1	2．3．4	2 3 4	VDmp	Kea
6 18		0 -8	10	8	6	10	6	15
18 30		0 -9	12	9	7	12	7	15
30 50		0 -11	14	11	8	16	8	20
50 80		0 -13	16	13	10	20	10	25
80 120		0 -15	19	19	11	26	11	35
120 150		0 -18	23	23	14	30	14	40
150 180		0 -25	31	31	19	38	19	45
180 250		0 -30	38	38	23		23	50
250 315		0 -35	44	44	26		26	60
315 400		0 -40	50	50	30		30	70
400 500		0 -45	56	56	34		34	80
500 630		0 -50	63	63	38		38	100
630 800		0 -75	94	94	55		55	120
800 1000		0 -100	125	125	75		75	140
1000 1250		0 -125						160
1250 1600		0 -160						190
1600 2000		0 -200						220
2000 2500		0 -250						250

DHK four point contact ball bearings are produced to normal axial clearance group (CN) as standard. DHK can provide four point contact ball bearings with other group clearance on request.

Detailed values for axial clearance groups are listed in the table below.

Internal axial clearance groups of DHK four point contact ball bearings

(Clearances are in [um])

Bore Dia.(mm)		C2		CN		C3			C4
>	<=	Min	max	Min	max	Min	max		Min	max
10	17	15	55	45	85	75	125		115	165
17	40	26	66	56	106	96	146		136	186
40	60	36	86	76	126	116	166		156	206
60	80	46	96	86	136	126	176		166	226
80	100	56	106	96	156	136	196		186	246
100	140	66	126	116	176	156	216		206	266
140	180	76	156	136	196	176	246		226	296
180	220	96	176	156	226	206	276		256	326
220	260	115	195	175	245	225	305		285	365
260	300	135	215	195	275	255	335		315	395
300	350	155	235	215	305	275	365		345	425
350	400	175	265	245	335	315	405		385	475
400	500	205	305	285	385	355	455	435			525

Dimensions and Parameters

Inquiry	Designation	Boundary dimensions（mm）								Load ratings(kN)		Speed ratings(rpm )		Mass
Inquiry	Designation	d	D	B	r1,r2 Min	a	an	bn	rn	dyn Cr	stat Cor	grease	oil	Kg
	QJ336N2.MPA	180	380	75	4	196	12.7	10.5	2	637	1020	1300	1800	47.5
	QJ1038N2.MPA	190	290	16	2.1	168	11.7	10.5	1	338	510	1600	2200	11.5
	QJ238N2.MPA	190	340	55	4	186	12.7	10.5	2	488	780	1400	1900	24.5
	QJ338N2.MPA	190	400	78	5	207	12.7	10.5	--	735	1250	1200	1600	52.1
	QJ1040N2.MPA	200	310	51	2.1	179	12.7	10.5	2	390	620	1500	2000	14.7
	QJ240N2.MPA	200	360	58	4	196	12.7	10.5	2	507	850	1300	1800	28.5
	QJ340N2.MPA	200	420	80	5	217.1	15	12.5	--	570	1270	1200	1600	55.3
	QJ1044.MPA	220	340	56	3	196	--	--	--	442	750	1300	1800	17.8
	QJ244N2.MPA	220	400	65	4	217	12.7	10.5	2	553	980	1100	1600	39.5
	QJ334N2.MPA	220	160	88	5	238	15	12.5	--	780	1400	1000	1500	78.5
	QJ1048.MPA	240	360	56	3	210	--	--	--	449	780	1200	1700	20.9
	QJ248N2.MPA	240	440	72	4	238	15	12.5	--	650	1200	1000	1500	53
	QJ1052.MPA	260	400	65	4	231	--	--	--	540	1000	1000	1500	31.5
	QJ252N2.MPA	260	480	80	5	259	15	12.5	--	728	1430	900	1300	68
	QJ1056N2.MPA	280	420	65	4	245	15	12.5	--	553	1060	950	1400	33.5
	QJ1256N2.MPA	280	500	90	5	390	15	12.5	--	728	1460	900	1300	82
	QJ1060N2.MPA	300	460	74	4	266	15	12.5	--	650	1340	900	1300	47.5
	QJ1260N2.MPA	300	540	98	5	420	20	15.5	--	832	1760	850	1200	105
	QJ1064N2.MPA	320	480	74	4	280	15	12.5	--	663	1400	850	1200	50
	QJ1264N2.MPA	320	580	105	5	450	20	15	--	923	2040	800	1100	130
	QJ1068N2.MPA	340	520	82	5	301	15	12.5	--	780	1700	800	1100	66.3
	QJ1072N2.MPA	360	540	82	5	505	15	12.5	--	793	1800	800	1100	70.5
	QJ1272N2.MPA	360	650	122	6	329	25	20.5	--	1110	2600	700	950	160
	QJ1076N2.MPA	380	560	82	5	530	15	12.5	--	819	1900	750	1000	73.5
	QJ1276N2.MPA	380	680	132	6	350	25	20.5	--	1170	2850	670	900	220
	QJ1080N2.MPA	400	600	90	5	343	15	12.5	--	904	2160	700	950	95.5
	QJ1280N2.MPA	400	720	140	6	364	25	20.5	--	1300	3250	600	800	265
	QJ1984.MPA	420	560	65	4	590	--	--	--	637	1600	700	950	51
	QJ1084N2.MPA	420	620	90	5	364	15	12.5	--	923	2280	670	900	99.5
	QJ1284N2.MPA	420	760	150	7.5	590	25	20.5	--	1430	3750	560	750	315
Previous 1 234 Next