Double Row Angular Contact Ball bearings

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Design Variants

Misalignment

Cage

Tolerance

Internal clearance

DHK double row angular contact ball bearings have three basic designs:

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1) 32 and 33 type double row angular contact ball bearings(sketch a), feature a filling slot in one face and contact angle of 35 . These bearings must be mounted in such a way the large thrust force acts towards the raceway without the filling slot.

2) 32 B and 33B type double row angular contact ball bearing (sketch b), this is the latest designs, no filling slots, contact angle is 32 . these bearing are capable of accommodating thrust forces equally well in both directions. DHK double row angular contact ball bearings of B design are available with shields or seals on both sides (sketch d and e).For manufacturing reasons, the open design bearings also may have grooves in their outer rings, that are used to locate either shields or seals (sketch c).

3) 33DA type double row angular contact ball bearings, feature two-half inner ring and contact angle of 45 , no filling slots, inner rings are separable (sketch f ).

DHK double row angular contact ball bearings have three basic designs:

1) 32 and 33 type double row angular contact ball bearings(sketch a), feature a filling slot in one face and contact angle of 35 . These bearings must be mounted in such a way the large thrust force acts towards the raceway without the filling slot.
2) 32 B and 33B type double row angular contact ball bearing (sketch b), this is the latest designs, no filling slots, contact angle is 32 . these bearing are capable of accommodating thrust forces equally well in both directions. DHK double row angular contact ball bearings of B design are available with shields or seals on both sides (sketch d and e).For manufacturing reasons, the open design bearings also may have grooves in their outer rings, that are used to locate either shields or seals (sketch c).
3) 33DA type double row angular contact ball bearings, feature two-half inner ring and contact angle of 45 , no filling slots, inner rings are separable (sketch f ).
DHK double row angular contact ball bearings are produced and fitted with pressed steel cages(no suffix indicated), polyamide cages (suffix TV) or brass cages (suffix M).
Kindly please clarify this point period of place an order.

DHK double row angular contact ball bearings are produced to normal class tolerance (PN) as standard.

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

Tolerances for DHK double row angular 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 double row angular contact ball bearings are produced to axial clearance group CN(normal) as standard. DHK can provide bearings with other axial clearance group on request.

Note: 33DA type application on where have high axial load, there for the press fit to shaft or house will tighten than other bearings, so the normal axial clearance of this design should be C3 group.

Values of clearance groups are listed in the table below.

Axial Internal Clearance Groups Of DHK Double Row Angular Contact Ball Bearings

Bore Dia.(mm)		C2(um)	CN(um)	C3(um)		C4(um)
<=	<=
-- 10		1 11	5 21	12 28		25 45
10 18		1 12	6 23	13 31		27 47
18 24		2 14	7 25	16 34		28 47
24 30		2 15	8 27	18 37		30 50
30 40		2 16	9 29	21 40		33 54
40 50		2 18	11 33	23 44		36 58
50 65		3 22	13 36	26 48		40 63
65 80		3 24	15 40	30 54		46 71
80 100		3 26	18 48	35 63		55 83
100 120		4 30	22 53	42 73		65 96
120 140		4 34	25 59		48 82	74 108

Dimensions and Parameters

Inquiry	Designations	Boundary dimensions					Load ratings[KN]		Speed ratings[rpm]		Mass
Inquiry	Designations	d	D	B	r1,r2 Min	a ≈	Dynmic Cr	stat Cor	grease	oil	Mass
	3811B.2Z	55	72	13	0.3	30.7	12.8	14.4	5500	--	0.01
	3911B	55	80	19	0.6	--	20	21.7	5300	6200	0.282
	3911B.2RSR	55	80	19	0.6	--	20	21.7	5300	--	0.282
	3911B.2Z	55	80	19	0.6	--	20	21.7	5300	--	0.282
	3011B	55	90	26	1	--	43.7	44.7	4800	5800	0.581
	3011B.2RSR	55	90	26	1	--	43.7	44.7	4800	--	0.581
	3011B.2Z	55	90	26	1	--	43.7	44.7	4800	--	0.581
	3211B	55	100	33.3	1.5	50	58.8	49	4300	5600	1.1
	3211B.2RSR	55	100	33.3	1.5	50	58.5	49	2800	--	1.1
	3211B.2Z	55	100	33.3	1.5	50	58.5	49	4300	--	1.1
	3311B	55	120	49.2	2	61	102	78	3800	5000	2.6
	3311B.2RSR	55	120	49.2	2	61	102	78	2500	--	2.6
	3311B.2Z	55	120	49.2	2	61	102	78	3800	--	2.6
	3311DA.MA	55	120	49.2	2	111	110	100	--	5000	2.93
	3812B	60	78	14	0.3	33.2	13.6	16.2	5000	5500	0.14
	3812B.2RSR	60	78	14	0.3	33.2	13.6	16.2	5000	--	0.14
	3812B.2Z	60	78	14	0.3	33.2	13.6	16.2	5000	--	0.14
	3912B	60	85	19	0.6	--	21	23.8	4800	5300	0.303
	3912B.2RSR	60	85	19	0.6	--	21	23.8	4800	--	0.303
	3912B.2Z	60	85	19	0.6	--	21	23.8	4800	--	0.303
	3012B	60	95	26	1.1	--	47.2	53.4	4400	5000	0.621
	3012B.2RSR	60	95	26	1.1	--	47.2	53.4	4400	--	0.621
	3012B.2Z	60	95	26	1.1	--	47.2	53.4	4400	--	0.621
	3212B	60	110	36.5	1.5	55	72	61	3800	5000	1.4
	3212B.2RSR	60	110	36.5	1.5	55	72	61	2500	--	1.4
	3212B.2Z	60	110	36.5	1.5	55	72	61	3800	--	1.4
	3312B	60	130	54	2.1	67	125	98	3400	4500	3.3
	3312B.2RSR	60	130	54	2.1	67	125	98	2300	--	3.3
	3312B.2Z	60	130	54	2.1	67	125	98	3400	--	3.3
	3312DA.MA	60	130	54	2.1	122	127	118	--	4500	3.28
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