STILBEARING

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Welcome new and old customers to choose our products!

Please contact STILBearing for more information on any of the below or about sizes not listed as new sizes are constatly becoming available

Tel:	86-510-82726643
Fax:	86-510-68930187
E-mail:	stlpt@vip.163.com

Technical Reference

1.Characteristics of Various of Bearings

Type

Radial load

Axial Load

Compound load

Shield & Seal

Self Aligning

Rings Separable

High Speed

High Rigidity

High Running Precision

Low Friction

Low Runging Noise

Tapered Bore

Deep Groove Ball Bearing

- -

+++

- -

Self-Aligning Ball Bearing

+++

- -

Angular Contact Ball Bearing

- -

+++

- -

Four-Point Ball Bearing

- -

Cylindrical Roller Bearing

- -

+++

- -

Needle Roller Bearing

- -

Spherical Roller Bearing

+++

- -

Taper Ball Bearing

+++

- -

Thrust Ball Bearing

- -

Thrust Cylindrical Roller Bearing

- -

Thrust Needle Roller Bearing

- -

Thrust Spherical Roller Bearing

- -

+++

- -

Self-Aligning Roller Bearing

+++

- -

+++

- -

Symbols: +++ excellent ++ good + fair - poor - - unsuitable

2.Material & Toleranes

Material

-The rings, balls, needles and rollers of STIL bearings can be made of refining bearing steel AISI52100, stainless steel AISI440C, AISI420, etc. .
-Cages are normally punch-pressed from brass strips H62 or steel strips 08, SPCC BQB402, as well as stainless steel strips AISI304, AISI302, fiber reinforced phenolic resin, plastics or copper stock, etc;
-The shields can be made of Japanese SPCC JISG3141 or stainless steel AISI304 or AISI302.
-Seals: synthetic rubber hot pressed with phosphatizing steel (AISI304 or AISI302 may used for stainless steel bearings) skeleton
The chemical composition of bearing steel and stainless steel are listed as follows:

Steel No.	c%	Si%	Mn%	S%	P%	Cr%
AISI52100	0.95-1.05	0.15-0.3	0.25-0.45	＜0.025	＜0.025	1.3-1.6
AISI440C	0.90-1.05	＜0.8	＜0.8	＜0.04	＜0.03	16-19

Bearing Precision Grade

Standards	Precision Grade
GB	G	E	D	C	B
ISO	Normal Class	Class6	Class5	Class4	Class2
ANSI	ABEC-1	ABEC-3	ABEC-5	ABEC-7	ABEC-9
DIN	P0	P6	P5	P4	P2
JIS	0	6	5	4	2

3.Rolling Bearing’s Tolerance

a).Precision of radial bearings (excepting taper roller bearings)

1)Inner rings (bore)

Bore	△dmp			Vdp									Vdmp
Bore	△dmp			Dimension sereis 7,8,9			Dimension series 0,1			Dimension series 2,3,4			Vdmp
d mm	P0	P6	P5	P0	P6	P5	P0	P6	P5	P0	P6	P5	P0	P6	P5
over to	over to	over to	over to	Max.			Max.			Max.			Max.
2.5 10	0 -8	0 -7	0 -5	10	9	5	8	7	4	6	5	4	6	5	3
10 18	0 -8	0 -7	0 -5	10	9	5	8	7	4	6	5	4	6	5	3
18 30	0 -10	0 -8	0 -6	13	10	6	10	8	5	8	6	5	8	6	3
30 50	0 -12	0 -10	0 -8	15	13	8	12	10	6	9	8	6	9	8	4
50 80	0 -15	0 -12	0 -9	19	15	9	19	15	7	11	9	7	11	9	5
80 120	0 -20	0 -15	0 -10	25	19	10	25	19	8	15	11	8	15	11	5
120 150	0 -25	0 -18	0 -13	31	23	13	31	23	10	19	14	10	19	14	7
150 180	0 -25	0 -18	0 -13	31	23	13	31	23	10	19	14	10	19	14	7
180 250	0 -30	0 -22	0 -15	38	28	15	38	28	12	23	17	12	23	17	8

2）Inner rings（rotating precision & width)

Bore	Kia			Sd	Sia	△Bs			△Bs			VBs
Bore	Kia			Sd	Sia	(For single bearing)			(For matched bearing)			VBs
d mm	P0	P6	P5	P5	P5	P0	P6	P5	P0	P6	P5	P0	P6	P5
over to	over to	over to	over to	Max.	Max.	over to	over to	over to	over to	over to	over to	Max.
2.5 10	10	6	4	7	7	0 -120	0 -120	0 -40	0 -250	0 -250	0 -250	15	15	5
10 18	10	7	4	7	7	1 -120	1 -120	0 -80	0 -250	0 -250	0 -250	20	20	5
18 30	13	8	4	8	8	0 -120	0 -120	0 -120	0 -250	0 -250	0 -250	20	20	5
30 50	15	10	5	8	8	0 -120	0 -120	0-120	0 -250	0 -250	0 -250	20	20	5
50 80	20	10	5	8	8	0 -150	0 -150	0-150	0 -380	0 -380	0 -250	25	25	6
80 120	25	13	6	9	9	0 -200	0 -200	0-200	0 -380	0 -380	0 -380	25	25	7
120 150	30	18	8	10	10	0 -250	0 -250	0 -250	0 -500	0 -500	0 -380	30	30	8
150 180	30	18	8	10	10	0 -250	0 -250	0 -250	0 -500	0 -500	0 -380	30	30	8
180 250	40	20	10	11	13	0 -300	0 -300	0 -300	0 -500	0 -500	0 -500	30	30	10

Remarks:

1.The Sia tolerance is suitable for deep groove ball bearings & angular contact ball bearings
2.The △Bs is suitable for all rings of the matched bearings

3) Outer rings (OD)

D mm	△Dmp			Dimension sereis 7,8,9			VDp						Close type		VDmp
	△Dmp			Dimension sereis 7,8,9			Dimension series 0,1			Dimension series 2,3,4			Dimension series		VDmp
	P0	P6	P5	P0	P6	P5	P0	P6	P5	P0	P6	P5	2,3,4	0,1,2,3,4	P0	P6	P5
over to	over to	over to	over to	Max.			Max.			Max.			Max.		Max.
6 18	0 -8	0 -7	0 -5	10	9	5	8	7	4	6	5	4	10	9	6	5	3
18 30	0 -9	0 -8	0 -6	12	10	6	9	8	5	7	6	5	12	10	7	6	3
30 50	0 -11	0 -9	0 -7	14	11	7	11	9	5	8	7	5	16	13	8	7	4
50 80	0 -13	0 -11	0 -9	16	14	9	13	11	7	10	8	7	20	16	10	8	5
80 120	0 -15	0 -13	0 -10	19	16	10	19	16	8	11	10	8	26	20	11	10	5
120 150	0 -18	0 -15	0 -11	23	19	11	23	19	8	14	11	8	30	25	14	11	6
150 180	0 -25	0 -18	0 -13	31	23	13	31	23	10	19	14	10	38	30	19	14	7
180 250	0 -30	0 -20	0 -15	38	25	15	38	25	11	23	15	11	——	——	23	15	8

4)Outer rings（rotating precision & width)

D mm	Kea			SD	Sea	△Cs			VCs
D mm	P0	P6	P5	P5	P5	P0	P6	P5	P0	P6	P5
over to	Max.	Max.	Max.	Max.	Max.	over to	over to	over to	Max.
6 18	15	8	5	8	8	0 -120	0 -120	0 -40	15	15	5
18 30	15	9	6	8	8	1 -120	1 -120	0 -80	20	20	5
30 50	20	10	7	8	8	0 -120	0 -120	0 -120	20	20	5
50 80	25	13	8	8	10	0 -120	0 -120	0 -120	20	20	5
80 120	35	18	10	9	11	0 -150	0 -150	0 -150	25	25	6
120 150	40	20	11	10	13	0 -200	0 -200	0 -200	25	25	7
150 180	45	23	13	10	14	0 -250	0 -250	0 -250	30	30	8

5) Flanged outer rings

	△D1s, △D2s			△C1s, △C2s
D mm	P0	P6	P5	P0	P6	P5
over to	over to	over to	over to	over to	over to	over to
6 18	125 -50	125 -50	0 -25	0 -50	0 -50	0 -50
18 30	125 -50	125 -50	0 -25	0 -50	0 -50	0 -50

Remarks:

1.The VDp & VDmp tolerance are suitable for bearings without any snap rings
2.The Sea tolerance is suitable for deep groove ball bearings & angular contact ball bearings　

b).Precision of taper roller bearings

1) Inner rings

Bore	ali △dmp	Vdp		Vdmp		Kia		△Bs
d mm	P0,P6X	P6	P0,P6X	P6	P0,P6X	P6	P0,P6X	P6	P0	P6X	P6
over to	over to	over to	Max.		Max.		Max.		over to	over to	over to
10 18	0 -12	0 -7	12	7	9	5	15	7	0 -120	0 -50	0 -120
18 30	0 -12	0 -8	12	8	9	6	18	8	0 -120	0 -50	0 -120
30 50	0 -12	0 -10	12	10	9	8	20	10	0 -120	0 -50	0 -120
50 80	0 -15	0 -12	15	12	11	9	25	10	0 -150	0 -50	0 -150
80 120	0 -20	0 -15	20	15	15	11	30	13	0 -200	0 -50	0 -200
120 180	0 -25	0 -18	25	18	19	14	35	18	0 -250	0 -50	0 -250
180 250	0 -30	0 -22	30	22	23	16	50	20	0 -300	0 -50	0 -300

2)Outer rings

D	ali △Dmp	VDp		VDmp		Kea		ali△Cs
mm	P0,P6X	P6	P0,P6X	P6	P0,P6X	P6	P0,P6X	P6	P6X	P0,P6
over to	over to	over to	Max.		Max.		Max.		over to	over to
18 30	0 -12	0 -8	12	8	9	6	18	9	0 -100	same as △Bs of same d
30 50	0 -14	0 - 9	14	9	11	7	20	10	0 -100
50 80	0 -16	0 -11	16	11	12	8	25	13	0 -100
80 120	0 -18	0 -13	18	13	14	10	35	18	0 -100
120 150	0 -20	0 -15	20	15	15	11	40	20	0 -100
150 180	0 -25	0 -18	25	18	19	14	45	23	0 -100
180 250	0 -30	0 -20	30	20	23	15	50	25	0 -100

c).Precision of thrust ball bearings

1) Shaft washers & middle washers

d or d2	△dmp or △d2mp		Vdp or Vd2p		Si
mm	P0	P6	P0	P6	P0	P6
over to	over to	over to	Max.		Max.
- 18	0 -8	0 -8	6	6	10	5
18 30	0 -10	0 -10	8	8	10	5
30 50	0 -12	0 -12	9	9	10	6
50 80	0 -15	0 -15	11	11	10	7
80 120	0 -20	0 -20	15	15	15	8
120 180	0 -25	0 -25	19	19	15	9
180 250	0 -30	0 -30	23	23	20	10

2)House washers

D	△Dmp		VDp		Se
mm	P0	P6	P0	P6	P0	P6
over to	over to	over to	Max.		Max.
10 18	0 -11	0 -11	8	8	same as Si of same d or d2
18 30	0 -13	0 -13	10	10
30 50	0 -16	0 -16	12	12
50 80	0 -19	0 -19	14	14
80 120	0 -22	0 -22	17	17
120 180	0 -25	0 -25	19	19
180 250	0 -30	0 -30	23	23

3)Height & middle washer's height

Bore	Singel direction	Double direction
	△Ts	△T1s	△T2s	△Bs
d mm	P0	P0	P0	P0
over to	over to	over to	over to	over to
- 30	0 -75	+50 -150	0 -75	0 -50
30 50	0 -100	+75 -200	0 -100	0 -75
50 80	0 -125	+100 -250	0 -125	0 -100
80 120	0 -150	+125 -300	0 -150	0 -125
120 180	0 -175	+150 -350	0 -175	0 -150
180 250	0 -200	+175 -400	0 -200	0 -175

d).Precision of conic bore radial bearings

Bore	△dmp	△d1mp-△dmp	Vdp
d mm	P0	P0	P0
over to	over to	over to	max.
- 10	+ 15 0	+ 15 0	10
10 18	+ 18 0	+ 18 0	10
18 30	+ 21 0	+ 21 0	13
30 50	+ 25 0	+ 25 0	15
50 80	+30 0	+ 30 0	19
80 120	+ 35 0	+ 35 0	25
120 180	+ 40 0	+ 40 0	31
180 250	+ 46 0	+ 46 0	38

Remarks:

1.The above tolerance is suitable for conic bore inner rings with taper being 1:12
2.a: 1/2 of metric taper of the conic bore
a=2°23'9.4"
=2.385 94°
=0.041 643 rad

4.Deep Groove Ball Bearing’s Vibration and Noise Class

The vibration and noise of deep groove ball bearings are normally classified as Z1, Z2(higher class than Z1), and Z3 (highest class). It is usually measured by instrument of SO910-1. While for bearings used for electric motors, the vibration & noise is measured by BVT-1 and classified as EMQ ZV1, ZV2 and ZV3. Customer needs to mark the requirement of vibration and noise class in order.

Acceleration Series(um/s)

d	V			V1			V2			V3
(mm)	Low Brand	Midium Brand	High Brand	Low Brand	Midium Brand	High Brand	Low Brand	Midium Brand	High Brand	Low Brand	Midium Brand	High Brand
5	110	72	60	90	60	50	58	36	30	35	21	18
6	110	72	60	90	60	50	58	36	30	35	21	18
7	130	96	80	110	80	65	72	48	40	44	28	24
8	130	96	80	110	80	65	72	48	40	44	28	24
9	130	96	80	140	80	65	72	48	40	44	28	24
10	160	120	100	140	100	85	90	60	50	55	35	30
12	160	120	100	180	100	85	90	60	50	55	35	30
15	210	150	120	180	130	100	110	78	60	65	46	35
17	210	150	120	220	130	100	110	78	60	65	46	35
20	260	190	150	220	160	125	130	100	75	80	60	45
22	260	190	150	220	160	125	130	100	75	80	60	45
25	260	190	150	220	160	125	130	100	75	80	60	45
28	260	190	150	250	160	125	130	100	75	80	60	45
30	300	240	190	250	200	160	150	120	100	90	75	60
32	300	240	190	250	200	160	150	120	100	90	75	60
35	300	240	190	250	200	160	150	120	100	90	75	60
40	360	300	260	300	250	220	180	150	130	110	90	80
45	360	300	260	300	250	220	180	150	130	110	90	80
50	420	320	320	350	270	270	210	160	160	125	100	100
55	420	360	360	350	300	300	210	180	180	125	110	110

Vibration Series(db)

d	6000 series				6200 series					6300 series
(mm)	Z	Z1	Z2	Z3	Z	Z1	Z2	Z3	Z4	Z	Z1	Z2	Z3	Z4
3	35	34	32	28	36	35	32	30		37	36	33	31
4	35	34	32	27	36	35	32	30		37	36	33	31
5	37	36	34	30	38	37	34	32		39	37	35	33
6	37	36	34	30	38	37	34	32		39	37	35	33
7	39	38	35	31	40	38	36
8	39	38	35	31	40	38	36	34
9	41	40	36	32	42	40	37	35
10	43	42	38	33	44	42	39	35	30	46	44	40	37	32
12	44	43	39	34	45	43	39	35	30	47	45	40	37	32
15	45	44	40	35	46	44	41	36	31	48	46	42	38	33
17	46	44	40	35	46	45	41	36	31	49	47	42	38	33
20	47	45	41	36	47	46	42	38	33	50	48	43	39	34
22	47	45	41	36	48	46	42	38	33	50	48	43	39	34
25	48	46	42	38	48	47	43	40	36	51	49	44	41	37
28	49	47	43	39	49	48	44	41	37	52	50	45	42	38
30	49	47	43	39	50	48	44	41	37	52	50	45	42	38
32	50	48	44	40	51	49	45	42	38	42	51	46	43	39
35	51	49	45	41	52	50	46	43	39	54	52	47	44	40
40	42	51	46	42	54	52	47	44	40	56	54	49	45	41
45	55	42	48	45	56	54	49	46	43	58	56	51	47	44
50	57	54	50	47	58	55	51	48	45	60	57	42	49	46
55	59	56	52	49	60	57	42	50	47	72	59	54	51	48
60	61	58	54	51	72	59	54	51	48	64	61	56	42	50

5.Bearing's Internal Radial Clearance of ...

a).Deep Groove Ball Bearings

Bore		Radial clearance
d mm		C2		C0		C3		C4		C5
over	to	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.
2.5	6	0	7	2	13	8	23	14	29	20	37
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	55	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

Remarks

1.For testing, there shall be a correction of the additional radial clearance due to the load of testing. The detailed amendment are as follows

Bore		Load of testing	Correction (um)
d mm		Load of testing	Correction (um)
over	to	N	C2	C0	C3	C4	C5
2.5	18	24.5	3-4	4	4	4	4
18	50	49	4-5	5	6	6	6
50	280	147	6-8	8	9	9	9

b).Matched Angular Contact Ball Bearings

Bore		Contacting angle 15°				Contacting angle 30°								Contacting angle 40°
d mm		C2		C0		C2		C0		C3		C4		C2		C0		C3		C4
over	to	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max
-	10	13	33	33	53	3	14	10	30	30	50	50	70	2	10	6	18	16	30	26	40
10	18	15	35	35	55	3	16	10	30	30	50	50	70	2	12	7	21	18	32	28	44
18	24	20	40	45	65	3	20	20	40	40	60	60	80	2	12	12	26	20	40	30	50
24	30	20	40	45	65	3	20	20	40	40	60	60	80	2	14	12	26	20	40	40	60
30	40	20	40	45	65	3	20	25	45	45	65	70	90	2	14	12	26	25	45	45	65
40	50	20	40	50	70	3	20	30	50	50	70	75	95	2	14	12	30	30	50	50	70
50	65	30	55	65	90	9	27	35	60	60	85	90	115	5	17	17	35	35	60	60	85
65	80	30	55	70	95	10	28	40	65	70	95	110	135	6	18	18	40	40	65	70	95
80	100	35	60	85	110	10	30	50	75	80	105	130	155	6	20	20	45	55	80	85	110
100	120	40	65	100	125	12	37	65	90	100	125	150	175	6	25	25	50	60	85	100	125
120	140	45	75	110	140	15	40	75	105	120	150	180	210	7	30	30	60	75	105	125	155
140	160	45	75	125	155	15	40	80	110	130	160	210	240	7	30	35	65	85	115	140	170
160	180	50	80	140	170	15	45	95	125	140	170	235	265	7	31	45	75	100	130	155	185
180	200	50	80	160	190	20	50	110	140	170	200	275	305	7	37	60	90	110	140	170	200

Remarks

1.The above data include the correction due to the testing load

c).Double Row Angular Contact Ball Bearings

Bore		Radial clearance
d mm		CD2		CD0		CD3
over	to	min.	max.	min.	max.	min.	max.
2.5	10	0	7	2	10	8	18
10	18	0	7	2	11	9	19
18	24	`	8	2	11	10	21
24	30	0	8	2	13	10	23
30	40	0	9	3	14	11	24
40	50	0	10	4	16	13	27
50	65	0	11	6	20	15	30
65	80	0	12	7	22	18	33
80	100	0	12	8	24	22	38
100	120	0	13	9	25	24	42
120	140	0	15	10	26	25	44
140	160	0	16	11	28	26	46
160	180	0	17	12	30	27	47
180	200	0	18	14	32	28	48

Remarks

1.The above data include the correction due to the testing load

d).Self-aligning Ball Bearings

Bore		Radial clearance
d mm		CD2		CD0		CD3
over	to	min.	max.	min.	max.	min.	max.
2.5	10	0	7	2	10	8	18
10	18	0	7	2	11	9	19
18	24	`	8	2	11	10	21
24	30	0	8	2	13	10	23
30	40	0	9	3	14	11	24
40	50	0	10	4	16	13	27
50	65	0	11	6	20	15	30
65	80	0	12	7	22	18	33
80	100	0	12	8	24	22	38
100	120	0	13	9	25	24	42
120	140	0	15	10	26	25	44
140	160	0	16	11	28	26	46
160	180	0	17	12	30	27	47
180	200	0	18	14	32	28	48

e).Electrical Motor Bearigs

For deep groove ball bearings

Bore		Radial clearance
d mm		CM
over	to	min.	max.
10	18	4	11
18	30	5	12
30	50	9	17
50	80	12	22
80	120	18	30
120	160	24	38

Remarks:

1.The correction due to testing load shall be save as normal deep groove ball bearings.

For Cylindrical roller bearings

Bore		Radial clearance
d mm		CT		CM
over	to	min.	max.	min.	max.
24	40	15	35	15	30
40	50	20	40	20	35
50	65	25	45	25	40
65	80	30	50	30	45
80	100	35	60	35	55
100	120	35	65	35	60
120	140	40	70	40	65
140	160	50	85	50	80
160	180	60	95	60	90
180	200	65	105	65	100

Remarks:

1."CT" is for the bearing interchangeable by the save manufacturer
2."CM" is for the bearing not interchangeable by the same manufacturer

f).Cylindrical Roller Bearings Needle Roller Bearings

Cylindrical bore

Bore		Radial clearance
d mm		C2		C0		C3		C4		C5
over	to	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.
-	10	0	25	20	45	35	60	50	75	-	-
10	24	0	25	20	45	35	60	50	75	65	90
24	30	0	25	20	45	35	60	50	75	70	95
30	40	5	30	25	50	45	70	60	85	80	105
40	50	5	35	30	60	50	80	70	100	95	125
50	65	10	40	40	70	60	90	80	110	110	140
65	80	10	45	40	75	65	100	90	125	130	165
80	100	15	50	50	85	75	110	105	140	155	190
100	120	15	55	50	90	85	125	125	165	180	220

Conic bore

Bore		Radial clearance
d mm		C2		C0		C3		C4		C5		C4		C5
over	to	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.
12	14	5	10	-	-	-	-	-	-	-	-	-	-	-	-
14	24	5	10	10	20	20	30	35	45	45	55	55	65	75	85
24	30	5	10	10	25	25	35	40	50	50	60	60	70	80	95
30	40	5	12	12	25	25	40	45	55	55	70	70	80	95	110
40	50	5	15	15	30	30	45	50	65	65	80	80	95	110	125
50	65	5	15	15	35	35	50	55	75	75	90	90	110	130	150
65	80	10	20	20	40	40	60	70	90	90	110	110	130	150	170
80	100	10	25	25	45	45	70	80	105	105	125	125	150	180	205
100	120	10	25	25	50	50	80	95	120	120	145	145	170	205	230

Remarks:

1."CT" is for the bearing interchangeable by the save manufacturer
2."CM" is for the bearing not interchangeable by the same manufacturer

g).Spherical Roller Bearings

Cylindrical bore

Bore		Radial clearance
d mm		C2		C0		C3		C4		C5
over	to	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.
14	18	10	20	20	35	35	45	45	60	60	75
18	24	10	20	20	35	35	45	45	60	60	75
24	30	15	25	25	40	40	55	55	75	75	95
30	40	15	30	30	45	45	60	60	80	80	100
40	50	20	35	35	55	55	75	75	100	100	125
50	65	20	40	40	65	65	90	90	120	120	150
65	80	30	50	50	80	80	110	110	145	145	180
80	100	35	60	60	100	100	135	135	180	180	225
100	120	40	75	75	120	120	160	160	210	210	260
120	140	50	95	95	145	145	190	190	240	240	300
140	160	60	110	110	170	170	220	220	280	280	350
160	180	65	120	120	180	180	240	240	310	310	390
180	200	70	130	130	200	200	260	260	340	340	430

Conic bore

Bore		Radial clearance
d mm		C2		C0		C3		C4		C5
over	to	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.
18	24	15	25	25	35	35	45	45	60	60	75
24	30	20	30	30	40	40	55	55	75	75	95
30	40	25	35	35	50	50	65	65	85	85	105
40	50	30	45	45	60	60	80	80	100	100	130
50	65	40	55	55	75	75	95	95	120	120	160
65	80	50	70	70	95	95	120	120	150	150	200
80	100	55	80	80	110	110	140	140	180	180	230
100	120	65	100	100	135	135	170	170	220	220	280
120	140	80	120	120	160	160	200	200	260	260	330
140	160	90	130	130	180	180	230	230	300	300	380
160	180	100	140	140	200	200	260	260	340	340	430
180	200	110	160	160	220	220	290	290	370	370	470

Remarks:

1."CT" is for the bearing interchangeable by the save manufacturer
2."CM" is for the bearing not interchangeable by the same manufacturer

6.ISO1132/GB4199 Bearing Tolerance Symbols Definitions

d/ds	Nominal bore diameter/Single bore diameter
dmp	Mean bore diameter; arithmetical mean of the largest & smallest single bore diameters measured in one radial plane
△dmp	dmp-d; Deviation of mean bore diameter from the nominal dimension
△ds	ds-d; deviation of single bore diameter from the nominal dimension
Vdp	Bore diameter variation; difference between the largest & smallest single bore diameters in one radial plane
Vdmp	dmp max-dmp min; Mean bore diameter variation; difference between the largest & smallest mean bore diameters
D/DS	Nominal outside diameter/Single outside diameter
Dmp	Mean outside diameter; arithmetical mean of the largest & smallest single outside diameters in one radial plane
△dmp	Dmp-D; Deviation of mean outside diameter from nominal dimension
△Ds	Ds-D; Deviation of mean outside diameter from nominal dimension
Vdp	Outside diameter variation; difference between the largest & smallest single outside diameter in one radial plane
VDmp	Dmp max-Dmp min; Mean outside diameter variation; difference between the largest & smallest mean outside diameters
Bs/Cs	Single inner ring/outer ring width
△Bs	Bs-B; Deviation of a single inner ring width from nominal dimension
△Cs	Cs-C; Deviation of a single outer ring width from nominal dimension
VBs	Bs max-Bs-min; Variation of inner ring widths; difference between the largest & smallest single inner ring width
VCs	Cs max-Cs min; Variation of outer ring widths; difference between the largest & smallest single outer ring width
B,C,T	Nominal bearing width/height
Ts	Actual bearing width/height
△Ts	Deviation of the actual bearing width/height
Kia	Radial runout of assembled bearing inner ring
Kea	Radial runout of assembled bearing outer ring
Sd	Side face runout of inner ring with reference to bore
SD	Variation in inclination of outside cylindrical surface to outer ring side face
Sia	Axial runout; assembled bearing inner ring face runout with raceway
r	Norminal chamfer dimension
rs	Radial/axial single chamfer dimension
rs min	Smallest radial/axial single chamfer dimension
rs max	Largest radial/axial single chamfer dimension

7. Characteristics of grease lubrication

Company Brand	Designation	Dropping Tem. ℃	Penetration at 25℃	Working Tem.℃	Remarks
Shell	Alvania R2	185	265-295	-35-120	General purpose
	Alvania R3	185	220-250	-35-135
	Alvania RA	180	250-275	-25-100
	Alvania EP1	180	310-340	-25-110
	Alvania EP2	185	265-295	-25-110
	Darina 2	250	265-295	-25-150	high Tem. service
	Darina EP2	250	265-295	-25-150	high Tem. service
	dolium R2	250	265-295	-35-150	corrosion resistnat

Esso	Andok C	260	190-210	-30-120	General purpose
	Adnok 260	190	204-260	-40-120	General purpose
	Beacon 325	190	255-280	-54-120	low Tem. service

Chevron	SRI-2	240	255-280	-30-120	water resistant

Mobil	Mobilux 2	190	265-290	-10-110	general purpose
	Mobil 22	192	250-274	-40-120	general purpose
	Mobil 28	260	265-295	-55-175	wide range Tem. service
	Mobil 48	260	240-270	-60-170	high Tem. service

Kluber	Isoflex LDS18	190	255-280	-50-110	low Tem. service
Kluber	Isoflex NBU15	250	255-280	-30-120	general purpose

yodo Yushi	Multemp SRL	185	225-245	-40-145	low torque service
	Multemp PS2	190	250-275	-50-110	low Tem. service
	Multemp SC-A	260	255-280	0-160	high Tem. service
	>Multemp ET150	>260	255-280	-10-160	high Tem. service

China Hangu	Hangu 2	198	265-295	-10-130	low noise service