Technical Data Sheet

Bearing Material

High carbon chrome bearing steel (Gcr15) is the standard material for bearing rings & rolling elements, following is its chemical composition. Also carbon steel & stainless steel will be used upon request.

CHEMICAL COMPOSITION OF BEARING STEEL

steel No.	Symbol	Chemical Composition (Wt%)
Gcr15	AISI 52100	C	Cr	Si	Mn	P	S
Gcr15	AISI 52100	0.95-1.05	1.30-1.65	0.15-0.35	0.2-0.4	＜0.027	＜0.02

THE CONTRAST OF GCR15 OF EACH COUNTRY

China	ISO	USA	Japan	Germany	France	Sweden
GB	683/xv11	AISI	JIS	DIN	NF	/
Gcr15	/	52100	SUJ2	100Cr6	100C6	SKF3

CAGES
In general, cages are pressed steel ribbon cages & pressed steel snap cages. For extra-high speed application, synthetic-resin, stainless steel, nylons will be used upon request.

SEALS & SHIELDS
SPCC are mainly used for shields, also carbon steel & stainless steel can be used. Buna nitrile rubber is standard sealing material we use, while fluorocarbon, silicone, and teflon seals are commonly specified for high temperatures.

LUBRICATION
Different types of greases can be supplies for shielded & sealed bearing and oil for open bearings.

Tolerance Class ABEC1

Inner Ring
Tolerance in um.
d		dmp		V_dp			V_dmp	Kia	Bs		V_Bs
d				Diameter Series
mm				9	0,1	2,3,4
over	incl.	high	low	max.			max.	max.	high	low	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	15
10	18	0	-8	10	8	6	6	10	0	-120	20

18	30	0	-10	13	10	8	8	13	0	-120	20
30	50	0	-12	15	12	9	9	15	0	-120	20
50	80	0	-15	19	19	11	11	20	0	-150	25
80	120	0	-20	25	25	15	15	25	0	-200	25

Outer Ring
Tolerance in um.
D		Dmp		V_Dp				V_Dmp	Kea	Cs		V_Cs
				Open Bearings			Capped Brgs.
				Diameter Series
mm				9	0,1	2,3,4	2,3,4
over	incl.	high	low	max.				max.	max.	high	low	max.
2.5	6	0	-8	10	8	6	10	6	15	Identical to Bs and VBs of inner ring of same bearing
6	18	0	-8	10	8	6	10	6	15
18	30	0	-9	12	9	7	12	7	15

30	50	0	-11	11	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

Tolerance Class ABEC3

Inner Ring
Tolerance in um.
d		dmp		V_dp			V_dmp	Kia	Bs		V_Bs
d				Diameter Series
mm				9	0,1	2,3,4
over	incl.	high	low		max.		max.	max.	high	low	max.
0.6	2.5	0	-7	9	7	5	5	5	0	-40	12
2.5	10	0	-7	9	7	5	5	6	0	-120	15
10	18	0	-7	9	7	5	5	7	0	-120	20

18	30	0	-8	10	8	6	6	8	0	-120	20
30	50	0	-10	13	10	8	8	10	0	-120	20
50	80	0	-12	15	15	9	9	10	0	-150	25
80	120	0	-15	19	19	11	11	13	0	-200	25

Outer Ring
Tolerance in um.
D		Dmp		V_Dp				V_Dmp	Kea	Cs		V_Cs
				Open Bearings			Capped Brgs.
				Diameter Series
mm				9	0,1	2,3,4	2,3,4
over	incl.	high	low	max.				max.	max.	high	low	max.
2.5	6	0	-7	9	7	5	9	5	8	Identical to Bs and VBs of inner ring of same bearing
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

Tolerance Class ABEC5

Inner Ring
Tolerance in um.
d		dmp		V_dp Diameter Series		V_dmp	Kia	Sd	Sia	Bs		V_Bs
				V_dp Diameter Series
mm				9	0,1,2,3,4
over	incl.	high	low	max		max.	max.			high	low	max.
0.6	2.5	0	-5	5	4	3	4	7	7	0	-40	5
2.5	10	0	-5	5	4	3	4	7	7	0	-120	5
10	18	0	-5	5	4	3	4	7	7	0	-120	5

18	30	0	-6	6	5	3	4	8	8	0	-120	5
30	50	0	-8	8	6	4	5	8	8	0	-120	5
50	80	0	-9	9	7	5	5	8	8	0	-150	6
80	120	0	-10	10	8	5	6	9	9	0	-200	7

Outer Ring
Tolerance in um.
D		Dmp		V_Dp Diameter Series		V_Dmp	Kea	SD	Sea	Cs		V_Cs
				V_Dp Diameter Series
mm				9	0,1,2,3,4
over	incl.	high	low	max		max.	max.			high	low	max.
2.5	6	0	-5	5	4	3	5	8	8	Identical to Bs and VBs of Inner ring of same bearing		5
6	18	0	-5	5	4	3	5	8	8			5
18	30	0	-6	5	5	3	6	8	8			5

30	50	0	-7	7	5	4	7	8	8			5
50	80	0	-9	9	7	5	8	8	10			6
80	120	0	-10	10	8	5	10	9	11			8
120	150	0	-11	11	8	6	11	10	13			8

Radial Clearance

The radial clearance of our bearings can be classified into C₂, C_0,C_3,C₄& C₅according to customer’s request.

Table of Radial Clearance (um)

Bore Diameter		C₂		C₀		C₃		C₄		C₅
over	to	max	min	max	min	max	min	max	min	max	min
2.5	6	0	7	2	13	8	23	–	–	–	–
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

Note:C₂clearance only for bearings over ABEC-3 accuracy.

Vibration

The vibration and noise of bearings are classified in four classes as Z1, Z2, Z3 and Z4. It is measured by the instrument of SO910-1.For special requirement, it is measured by BVT-1 and classified as V1, V2 and V3. The data are shown in below tables. different vibration & noise requirement should be mentioned in order.

TOLERANCE DATA FOR VIBRATION OF SINGLE BEARING Tolerance in um/s
d	V			V1			V2			V3
mm	Low	Medium	High	Low	Medium	High	Low	Medium	High	Low	Medium	High
mm	Brand	Brand	Brand	Brand	Brand	Brand	Brand	Brand	Brand	Brand	Brand	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	110	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	140	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	180	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	220	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

MAXIMUM VIBRATION ACCELERATION OF SINGLE BEARING Tolerance in dB
d	Diameter Series (0)				Diameter Series (2)				Diameter Series (3)
mm	Z	Z1	Z2	Z3	Z	Z1	Z2	Z3	Z	Z1	Z2	Z3
3	35	34	32	28	36	35	32	30	37	36	33	31
4	35	34	32	28	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	34	–	–	–	–
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	46	44	40	37
12	44	43	39	34	45	43	39	35	47	45	40	37
15	45	44	40	35	46	44	41	36	48	46	42	38
17	46	44	40	35	47	45	41	36	49	47	42	38
20	47	45	41	36	48	46	42	38	50	48	43	39
22	47	45	41	36	48	46	42	38	50	48	43	39
25	48	46	42	38	49	47	43	40	51	49	44	41
28	49	47	43	39	50	48	44	41	52	50	45	42
30	49	47	43	39	50	48	44	41	52	50	45	42
32	50	48	44	40	51	49	45	42	53	51	46	43
35	51	49	45	41	52	50	46	43	54	52	47	44
40	53	51	46	42	54	52	47	44	56	54	49	45
45	55	53	48	45	56	54	49	46	58	56	51	47
50	57	54	50	47	58	55	51	48	60	57	53	49
55	59	56	52	49	60	57	53	50	62	59	54	51

lubrication

We can fill different No. or brand lubricating oil or grease according to the requirements of clients.

Grease Brand	Designation	Dropping Temp.^oC	Penetration at 25^oC	Working Temp. ^oC	Remarks
Shell	Alivania RL2	185	265-295	-35-120	General Usage
	Alivania RL3	185	220-250	-35-135
	Alivania RA	180	250-275	-25-100
	Alivania EP1	180	310-340	-25-110
	Alivania EP2	185	265-295	-25-110
	Darina 2	250	265-295	-25-150	Hot Environment
	Darina EP2	250	265-295	-25-150	Hot Environment
	Dolium R2	250	265-295	-35-150	Anti-Corrosion
Esso	Andok C	260	190-210	-30-120	General Usage
	Andok 260	190	204-260	-40-120	General Usage
	Beacon 325	190	255-280	-54-120	Low Temperature
Chevron	SRI-2	240	255-280	-30-120	Water Proofing
Mobil	Moilux 2	190	265-290	-10-110	General Usage
	Mobil 22	192	260-274	-40-120	General Usage
	Mobil 28	260	265-295	-55-175	Hot Environment
	Mobil 48	260	240-270	-60-170	Hot Environment
Kluber	Isoflex LDS 18	190	255-280	-50-110	Low Temperature
Kluber	Isoflex NBU 15	250	255-280	-30-120	General Usage
Kyodo Yushi	Multemp SRL	185	225-245	-40-145	Low Temperature
	Multemp PS2	190	250-275	-50-110	Low Temperature
	Multemp SC-A	260	255-280	0-160	Hot Environment
	Multemp ET150	260	255-280	-10-160	Hot Environment
China Hangu	Hangu 2	198	265-295	-10-130	Reduce Noise

KZMEC® OB™ Bearing & Transmission

SHANGHAI KZMEC CO., LTD. | Tel: (+86) 1 800 165 2727 | Bearing@Bearing.Group | a company of KUNZUN & SUNNUN (HMEC.GROUP)

Technical Data Sheet