Materials and Standards – Wuhu Jingqiu Electromechanical Co.,Ltd

Bearing The Selection Of Material

The ring and balls of SDLB bearings are made of refining steel GCr15(AIS152100),the retainerare punched from brassstrip(H62)ortop quality cold-rolled steel strip(SPCC BQB402)and reinforced plastics are avail-able if necessary.Theshield is made ofimported special material (SPCCJISG314),sealing ring adopts phosphatingframed and fiber-like oiresistant rubberhot-pressingis made.

Steel NO.

C(%)

Si(%)

Mn(%)

S(%)

P(%)

Cr(%)

GCr15

0.95-1.05

0.15-0.3

0.25-0.45

0.025

1.3-1.6

9Cr18Mo

0.90-1.05

<0.8

<0.04

<0.03

16-19

Bearing accuracy

Bearing accuracy,refers to the size precision and the rotating precision.International bearing precision grade is dividedinto:level 0.level 6.level 5.level 4.level2,eauivalent to ISO standard,the different standards of precision gradecontrast follows.

标准代号NO.

Accuracy Grade

中国

ISO

国际

ANSI

美国

ABEC1

ABEC3

ABEC5

ABEC7

ABEC9

SKF

瑞典

DIN

德国

JIS

日本

Deep groove ball bearing radial clearance Cr(no load)

(d/mm)		2group		Ogroup		3group		4group		5group
Exceed	TO	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max
6	10	0	7	2	13	8	23	14	29	20	37
10	18	0	9	3	18	11	25	18	33	25	45
18	24	0	10	5	20	13	28	20	36	28	48
24	30	1	11	5	20	13	28	23	41	30	53
30	40	1	11	6	20	15	33	28	46	40	64
40	50	1	11	6	23	18	36	30	51	45	73
50	65	1	15	8	28	23	43	38	61	60	90
65	80	1	15	10	30	25	51	46	71	65	105
80	100	1	18	12	36	30	58	53	84	75	120
100	120	2	20	15	41	36	66	61	97	90	140
120	140	2	23	18	48	41	81	71	114	105	160
140	160	2	23	18	53	46	91	81	130	120	180
160	180	2	25	20	61	53	102	91	147	135	200
180	200	2	30	25	71	63	117	107	163	150	230
200	225	2	35	25	85	75	140	125	195	175	265
225	250	2	40	30	95	85	160	145	225	205	300
250	280	2	45	35	105	90	170	155	245	225	340
280	315	2	55	40	115	100	190	175	270	245	370
315	355	3	60	45	125	110	210	195	300	278	410
355	400	3	70	55	145	130	240	225	340	315	460
400	450	3	80	60	170	150	270	250	380	350	510
450	500	3	90	70	190	170	300	280	420	390	570
500	560	10	100	80	210	190	330	310	470	440	630
560	630	10	110	90	230	210	360	340	520	490	690
630	710	20	130	110	260	240	400	380	570	540	760
710	800	20	140	120	290	270	450	430	630	600	840
800	900	20	160	140	320	300	500	480	700	670	940
900	1000	20	170	150	350	330	550	530	770	740	1040
1000	1120	20	180	160	380	360	600	580	850	820	1150
1120	1250	20	190	170	410	390	650	630	920	890	1260

0 Levels of tolerance

(0 levels of tolerance of outer ring) μm
d mm		Admp		Vdp			Vdmp	Kia	△Bs			VBs
				D iam e t e rseres					All	Normal	²
				7.8.9	0、1 2.3.4
Exceed	To	Upper deviation	Lower deciation	Max			Max	Max	Upper	Lower deviation		Max
0.6	2.5	0	8	10	8	6	6	10	0	40		12
2.5	10	0	-8	10	8	6	6	10	0	-120	-250	15
10	18	0	8	10	8	6	6	10	0	-120	-250	20
18	30	0	-10	13	10	8	8	13	0	-120	-250	20
30	50	0	-12	15	12	9	9	15	0	-120	-380	20
50	80	0	-15	19	19	11	11	20	0	-150	-380	25
80	120	0	-20	25	25	15	15	25	0	-200	-500	25
120	180	0	-25	31	31	19	19	30	0	-250	-500	30
180	250	0	-30	38	38	23	23	40	0	-300	-500	30
250	315	0	-35	44	44	26	26	50	0	-350	-630	35
315	400	0	40	50	50	30	30	60	0	400		40
400	500	0	-45	56	56	34	34	65	0	-450		50
500	630	0	-50	63	63	38	38	70	0	-500		60
630	800	0	-75		–			80	0	-750		70
800	1000	0	-100	二	二	二	二	90	0	-1000	二	80
1000	1250	0	-125		–			100	0	-1250		100
1250	1600	0	-160		–	–		120	0	-1600		120
1600	2000	0	-200					140	0	-2000		140

(0 levels of tolerance of outer ring) 单位：pm
d mm		△Dmp		Open beanng			Closed type bearing	VDmp	Kea	△cs		Ves
				Diameter series
				7.8.9	0.1	2.3.4	2.3、4
Exceed	To	devtalen	devialen	M a x				Max	Max	Upper	devaten	Max
2.5	6	0	-8	10	8	6	10	6	15	With the same bearing inner ring of△Bs and VBs ofthe same
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	一	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

6 Levels of tolerance


d mm		△dmp		Vdp			Vdmp	Kia	△Bs				VBs
				series 7.8.9 0.1 2.3.4					All		Normal	2
Exceed	To	Upper doviation	Lower doviation	Max			Max	Max	Upper doviation		Lower deviation		Max
0.6	2.5	0	-7	9	7	5	5	5	0		-40	-250	12
2.5	10	0	-7	9	7	5	5	6	0		-120	-250	15
10	18	0	-7	9	7	5	5	7	0		-120	-250	20
18	30	0	-8	10	8	6	6	8	0		-120	-250	20
30	50	0	-10	13	10	8	8	10	0		-120	-250	20
50	80	0	-12	15	15	9	9	10	0		-150	-380	25
80	120	0	-15	19	19	11	11	13	0		-200	-380	25
120	180	0	-18	23	23	14	14	18	0		-250	-500	30
180	250	0	-22	28	28	17	17	20	0		-300	-500	30
250	315	0	-25	31	31	19	19	25	0		-350	-500	35
315	400	0	-30	38	38	23	23	30	0		-400	-630	40
400	500	0	-30	44	44	26	26	35	0		450	一	45
500	630	0	-40	50	50	30	30	40	0		-500		50
(6 levels of tolerance of outer ring)：μm
D mm		△Dmp		V Open beanng		Dp Closed type bearing		VDmp	Kea	△cs			Vcs
				Diameter series 7.8.9 0. 2.3.4
Exceed	To	Upper doviation	Lower doviation	Max				Max	Max	Upper Lower doviation doviation			Max
2.5′	6	0	-7	9	7	5	9	5	8	With the same beaing inner ring of△Bs and VBs ofthe same
6	18	0	-7	9	7	5	9	5	8
18	30	0	-8	10	8	6	10	6	9
30	50	0	-9	11	9	7	13	7	10
50	80	0	-11	14	11	8	16	8	13
80	120	0	-13	16	16	10	20	10	18
120	150	0	-15	19	19	11	25	11	20
150	180	0	-18	23	23	14	30	14	23
180	250	0	-20	25	25	15		15	25
250	315	0	-25	31	31	19		19	30
315	400	0	-28	35	35	21		21	35
400	500	0	-33	41	41	25	一	25	40
500	630	0	-38	48	48	29		29	50
630	800	0	-45	56	56	34	一	34	60
800	1000	0	-60	75	75	45		45	75

5 Levels of tolerance

(5 levels of tolerance of outer ring) ：μm
d mm		△dmp			Vdp				Vdmp	Kia	Sd	Sia	△Bs			VBs
					Diameter series								All	Normal	2
					9		0.1.2. 3.4
Exceed	To	Upper doviation	Lower doviation		Max				Max	Max	Max	Max	Upper doviation	Lower deviation		Max
	0.6	0	-5		5		4		3	4	7	7	0	40	-250	5
0.6	2.5	0	-5		5		4		3	4	7	7	0	-40	-250	5
2.5	10	0	-5		5		4		3	4	7	7	0	-40	-250	5
10	18	0	-5		5		4		3	4	7	7	0	-80	-250	5
18	30	0	-6		6		5		3	4	8	8	0	120	-250	5
30	50	0	-8		8		6		4	5	8	8	0	-120	-250	5
50	80	0	-9		9		7		5	5	8	8	0	-150	-250	6
80	120	0	-10		10		8		5	6	9	9	0	-200	-380	7
120	180	0	-13		13		10		7	8	10	10	0	-250	-380	8
180	250	0	-15		15		12		8	10	11	13	0	-300	-500	10
250	315	0	-18		18		14		9	13	13	15	0	-350	-500	13
315	400	0	-23		23		18		12	15	15	20	0	-400	-630	15
A is only applicable to groove type ball bearings. B is suitable for the inner and outer rings of individual bearings when installed in pairs or groups, as well as for the inner rings of tapered bore bearings with a diameter of d ≥ 50mm,

(5 levels of tolerance of outer ring unit：μm
D mm		△Dmp		VDp				s VDmp		Kea	SD SD16	Seab	Sea16	△ce △C1a		Vcs Vc¹a⁶
				Diameter serie
				9		0.1.2. 3.4
Exceed	To	Upper doviation	Lower doviation	Max				Max		Max	Max	Max	Max	Upper Lower dowiation doviation		Max
	2.5	0	-5	5		4		3		5	8	8	11	With the same bearing inner ring of△Bs ofthe same		5
2.5	6	0	-5	5		4		3		5	8	8	11			5
6	18	0	-5	5		4		3		5	8	8	11			5
18	30	0	-6	6		5		3		6	8	8	11			5
30	50	0	-7	7		5		4		7	8	8	11			5
50	80	0	-9	9		7		5		8	8	10	14			6
80	120	0	-10	10		8		5		10	9	11	16			8
120	150	0	-11	11		8		6		11	10	13	18			8
150	180	0	-13	13		10		7		13	10	14	20			8
180	250	0	-15	15		11		8		15	11	15	21			10
250	315	0	-18	18		14		9		18	13	18	25			11
315	400	0	-20	20		15		10		20	13	20	28			13
400	500	0	-23	23		17		12		23	15	23	33			15
500	630	0	-28	28		21		14		25	18	25	35			18
630	800	0	-35	35		26		18		30	20	30	42			20
A is not applicable to flange outer ring bearings. B is only applicable to groove type ball bearings.

Noise

Bearing noise detection is completed by the instrument S0910-3,which is
divided into Z1,Z2,Z3 and Z4.The dateare shown as below,customer need
mark the requirement of vibration and noise class on the order.

Single bearing vibration acceleration level(dB)(≤)
Bearing nominal inside diameter mm	Diameter series(0)			Diameter series(2)				Diameter series(3)
	Z	Z1	Z2	Z	Z1	Z2	Z3	Z	Z1	Z2	Z3
30	49	47	43	50	48	44	41	52	50	45	42
32	50	48	44	51	49	45	42	53	51	46	43
35	51	49	45	52	50	46	43	54	52	47	44
40	53	51	46	54	52	47	44	56	54	49	45
45	55	53	48	56	54	49	46	58	56	51	47
50	57	54	50	58	55	51	48	60	57	53	49
55	59	56	52	60	57	53	50	62	59	54	51
60	61	58	54	62	59	54	51	64	61	56	53
65	49	48	46	50	49	47	42	51	50	48	43
70	50	49	47	51	50	48	43	52	51	49	44
75	51	50	48	52	51	49	44	53	52	50	45
80	52	51	49	53	52	50	45	54	53	51	46
85	53	52	50	54	53	51	46	56	55	52	47
90	54	53	52	56	55	53	48	58	57	54	49
95	56	55	54	58	57	55	50	60	59	56	51
100	58	57	56	60	59	57	52	62	61	58	53
105	60	59	58	62	61	59	54	64	63	60	55
110	62	61	60	64	63	61	56	66	65	62	57
120	64	63	62	66	65	63	58	68	67	64	59

4 Levels of tolerance

(4 levels of lolerance of outer ring) unit：μm
d mm		△dmp		Vdp		Vap	Km	Se	Sa	△BS			VBS
				Dlameler serles						All	Nomal	Correction ²
Excee d	To	Upper deciat ion	Lower deciat ion	Max		Max	Max	Max	Max	Upper deciat ion	Lower deciation		Max
	0.6	0	4	4	3	2	2.5	3	3	0	-40	-250	2.5
0.6	2.5	0	-4	4	3	2	2.5	3	3	0	40	-250	2.5
2.5	10	0	-4	4	3	2	2.5	3	3	0	40	-250	2.5
10	18	0	-4	4	3	2	2.5	3	3	0	-80	-250	2.5
18	30	0	-5	5	4	2.5	3	4	4	0	-120	-250	2.5
30	50	0	-6	6	5	3	4	4	4	0	-120	-250	3
50	80	0	-7	7	5	3.5	4	5	5	0	-150	-250	4
80	120	0	-8	8	6	4	5	5	5	0	-200	-380	4
120	180	0	-10	10	8	5	6	6	7	0	-250	380	5
180	250	0	-12	12	9	6	8	7	8	0	-300	-500	6
A is only applicable to the Thousand Diameter series 0.1.2, 3, and 4 B is only applicable to groove type ball bearings C is suitable for single bearings when installed in pairs or groups Outer circle.

(4levels of tolerance of outer ring) unit：μm
D mm		△Dmp		VDp		VDmp	Kea	SD SD10	Seab	Sea16	△ce △C1ab		Vcs Vc¹ab
				Diameter series
				9	0.1. 2.3.
Excee	To	Upper doviatio	Lower doviatio	M ax		Max	Max	Max	Max	Max	Upper Lower doviatiodoviatio		Max
	2.5	0	-4	4	3	2	3	4	5	7	With the same bearing inner ring of△Bs ofthe same		2.5
2.5	6		-4	4	3	2	3	4	5	7			2.5
6	18	0	-4	4	3	2	3	4	5	7			2.5
18	30	0	-5	5	4	2.5	4	4	5	7			2.5
30	50	0	-6	6	5	3	5	4	5	7			2.5
50	80	0	-7	7	5	3.5	5	4	5	7			3
80	120	0	-8	8	6	4	6	5	6	8			4
120	150	0	-9	9	7	5	7	5	7	10			5
150	180	0	-10	10	8	5	8	5	8	11			5
180	250	0	-11	11	8	6	10	7	10	14			7
250	315	0	-13	13	10	7	11	8	10	14			7
315	400	0	-15	15	11	8	13	10	13	18			8
A is only applicable to diameter series 0.1.2.3 and 4 B is not applicable to flange outer ring bearings. C is only applicable to groove type ball bearings.

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Bearing The Selection Of Material

Bearing accuracy

Deep groove ball bearing radial clearance Cr(no load)

0 Levels of tolerance

6 Levels of tolerance

5 Levels of tolerance

Noise

4 Levels of tolerance

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