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Angular Contact Bearings

Auto Bearings

Cylindrial Roller Bearings

Deep Groove Bearing

Linear Motion Ball Bearing

Needle Roller Bearing

Pillow Blocks & Plummer Blocks

Plastic Bearing

Self-Aligning Ball Bearing

Spherical Plain

Spherical roller bearings

Tapered Roller Bearings

Thrust Bearings

HITEK Bearings Centre Ltd
E-Mail: sales@bearingscentre.com
Add.:16F minfa Building, no.88 dongshui Rd, Fuzhou, China
Tel.: 0086-591-28368998
Fax.:0086-591-28368977

1. Material:
The ring and balls of our bearings are made of refined high carbon-chrome bearing steel and Stainless steel. The retainers are punch-pressed from super quality cold-rolling seel sheet or made of reinforced engineering plastics. The shield is made of special material(SPCC.). The seals are hot-pressed from oil-resistant bune-N rubber with phosphatizing steel skeleton

2. Accuracy:
The accuracy of bearing made in accordance with GB/T307-94 National standard is classified in 2, 4,5,6 and 0 five grades. The table as below makes a comparison between this accuracy grade with ISO standard, etc.

Standard	Grade of accuracy
GB/T307-94	2(B)	4(C)	5(D)	6(E)	0(G)
ISO	2	4	5	6	0
ASA	ABEC9	ABEC7	ABEC5	ABEC3	ABEC1
SKF	P2	P4	P5	P6	0

The tolerances of standard grade (0 grade) bearings are shown as following table.

INNER RING
d (mm)		△dmp		VDP			∨dmp	Kia	△Bs		VBs
				Diameter Series
				9	0,1	2,3,4
over	incl	max	min	max			max	max	max	min	max
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
D(mm)		△Dmp		VDp				VDmp	Kea	△Cs		VCs
				open			closed
				9	0,1	2,3,4	2,3,4
over	incl	max	min	max				max	max	max	min	max
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	25	11	35	and VBs of that
120	150	0	-18	23	23	14	30	14	40	bearing

3. Vibration and Noise:
According to its accuracy Grade of the vibration value of the Noise of SL Bearing(Vibration)it is to be divided in Z1,Z2,Z3three groups.It can also be in accordance with Speed Grade of Vibration Value (µm/s) V1,V2¡,V3 Groups to measure its vibration.

If users have no requirement for vibration.The Normal Grade Bearing usually to be leaving out of the factory is in Vibration Value of Z1 Group.For exporting it is in Z2 Group.

Bearing Vibration speed Grade can not be over the following Value

VIBRATION(ACCELERATION)LIMITES FOR SINGLE BEARING

d mm	Diameter Series(1)			Diameter Series(2)			Diameter Series(3)
d mm	Z	Z1	Z2	Z	Z1	Z2	Z	Z1	Z2
10	43	42	38	42	39	35	44	40	37
12	44	43	39	43	39	35	45	40	37
15	45	44	40	44	41	36	46	42	38
17	46	44	40	45	41	36	47	42	38
20	47	45	41	46	42	38	48	43	39
25	48	46	42	47	43	40	49	44	41
30	49	47	43	48	44	41	50	45	42
35	51	49	45	50	46	43	52	47	44
40	53	51	46	52	47	44	54	49	45
45	55	53	48	54	49	46	56	51	47
50	57	54	50	55	51	48	57	53	49

VIBRATION(RELOCITY)LIMITES FOR SINGLE BEARING(μm/s)

d mm	V			V1			V2			V3
d mm	low band	mid band	high band	low band	mid band	high band	low band	mid band	high band	low band	mid band	high band
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	190	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

4. Clearance:

The radial clearance of bearings are divided into groups according to GB4604 National Standard as following table.

bearing bore (mm)		group 2-C2		basic group C0		group 3-C3		group 4-C2		group 5-C5
over	incl	min	max	min	max	min	max	min	max	min	max
10	18	0	8	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

Special radial clearance or axial clerance requirement could be made as specified in orders

bearing bore (mm)		group 2-C2		basic group C0		group 3-C3
over	incl	min	max	min	max	min	max
-	10	1	11	5	21	12	28
10	18	1	12	6	23	13	31
18	24	2	14	7	25	16	34
24	30	2	15	8	27	18	37
30	40	2	16	9	29	21	40
40	50	2	18	11	33	23	44
50	65	3	22	13	36	26	48
65	80	3	24	15	40	30	54
80	100	3	26	18	46	35	63

Grease Lubrication.

Company Brand	Designation	Dropping Tem ℃	Penetration at25℃	Warking 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
	Darina R2	250	265-295	-35-150	Corrosion resistant

Esso	Andok C	260	190-210	-30-120	General purpose
	Andok 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	Mobilux2	190	265-290	-10-110	General purpose
	Mobilux22	192	250-274	-40-120	General purpose
	Mobilux28	260	265-295	-55-175	Wide range Tem.Service
	Mobilux48	260	240-270	-60-170	High Tem.Service

Kluber	Isoflex LDS 18	190	255-280	-50-110	Low Tem.Service
Kluber	Isoflex NBU15	250	255-280	-30-120	General purpose

Kyobo yushi	Multemp SRL	185	225-245	-40-145	Low torque Service
	Multemp p32	190	250-275	-50-110	Low Tem.Service
	Multemp SC-A	260	225-280	0-160	High Tem.Service
	Multemp Et150	260	225-280	-10-130	High Tem.Service