NINGBO ZHENHAI JIANYE BEARING CO., LTD.

TOLERANCE CLASS

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TABLE1 TOLERANCES OF INNER RING um

Tolerance Class			d mm		Δ_dmp		Δ_ds¹⁾		V_dp²⁾			V_dmp	K_ia	S_d	S_ia³⁾	Δ_Bs		V_Bs
Tolerance Class			d mm		Δ_dmp		Δ_ds¹⁾		Diameter series			V_dmp	K_ia	S_d	S_ia³⁾	Δ_Bs		V_Bs
GB/T 272-93	ISO 492	ANSI /AFBMA	Over	Incl.	Upper	Lower	Upper	Lower	9	0,1	2.3.4	max	max	max	max	Upper	Lower	max
GB/T 272-93	ISO 492	ANSI /AFBMA	Over	Incl.	Upper	Lower	Upper	Lower	max			max	max	max	max	Upper	Lower	max
P0	Normal	ABEC-1	2.5	10	0	-8			10	8	6	6	10		20	0	-120	15
P6	Class6	ABEC-3	2.5	10	0	-7			9	7	5	5	6		10	0	-120	15
P5	Class5	ABEC-5	2.5	10	0	-5			5	4	4	3	4	7	7	0	-40	5
P4	Class4	ABEC-7	2.5	10	0	-4	0	-4	4	3	3	2	2.5	3	3	0	-40	2.5
P2	Class2	ABEC-9	2.5	10	0	-2.5	0	-2.5		2.5	2.5	1.5	1.5	1.5	1.5	0	-40	1.5

1)        Only suitable for diameter serial 0,1,2,3,4;
2)        No value is given for diameter serial 7,8;
3)        No value is given for P0,P6 in GB/T307.1-94, the data come from JB/T53415-94.

TABLE2 TOLERANCES OF OUTER RING        um

Tolerance Class			D mm		Δ_Dmp		Δ_Ds¹⁾		V_Dp²⁾³⁾				V_Dmp³⁾	K_ea	S_D	S_ea⁵⁾	Δ_Cs		V_Cs
Tolerance Class			D mm		Δ_Dmp		Δ_Ds¹⁾		Open			⁴⁾ Shield	V_Dmp³⁾	K_ea	S_D	S_ea⁵⁾	Δ_Cs		V_Cs
GB/T 272-93	ISO 492	ANSI /AFBMA	Over	Incl.	Upper	Lower	Upper	Lower	9	0,1	2.3.4	2.3.4	max	max	max	max	Upper	Lower	max
GB/T 272-93	ISO 492	ANSI /AFBMA	Over	Incl.	Upper	Lower	Upper	Lower	max				max	max	max	max	Upper	Lower	max
P0	Normal class	ABEC-1	6	18	0	-8			10	8	6	10	6	15		30	same asΔ_Bs value of inner ring of the same bearing		⁶⁾
P0	Normal class	ABEC-1	18	30	0	-9			12	9	7	12	7	15		36
P6	Class6	ABEC-3	6	18	0	-7			9	7	5	9	5	8		15
P6	Class6	ABEC-3	18	30	0	-8			10	8	6	10	6	9		20
P5	Class5	ABEC-5	6	18	0	-5			5	4	4		3	5	8	8			5
P5	Class5	ABEC-5	18	30	0	-6			6	5	5		3	6	8	8			5
P4	Class4	ABEC-7	6	18	0	-4	0	-4	4	3	3		2	3	4	5			2.5
P4	Class4	ABEC-7	18	30	0	-5	0	-5	5	4	4		2.5	4	4	5			2.5
P2	Class2	ABEC-9	6	18	0	-2.5	0	-2.5		2.5	2.5	2.5	1.5	1.5	1.5	1.5			1.5
P2	Class2	ABEC-9	18	30	0	-4	0	-4		4	4	4	2	2.5	1.5	2.5			1.5

1)        Suitable for diameter serial 0,1,2,3,4;
2)        No value is given for diameter serial 7,8;
3)        Suitable for when inner and outer brake ring have been discharged or not installed;
4)        No value is given for diameter serial 9,0,1 with P0 class, no value is given for diameter serial 9 with P2,P6 class, data are suitable for diameter serial 0,1,2,3,4;
5)        No value is given for P0,P6 in GB/T307.1-94, data come from JB/T53415-94;
6)        Same as V_Bs value of inner ring of the same bearing.

CLEARANCE

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ABLE3 INTERNAL RADIAL CLEARANCE um

mm Bore Diameter		C2		C0		C3		C4		C5
Over	Incl.	min	max	min	max	min	max	min	max	min	max
2.5	6	0	7	2	13	8	23	-	-	-	-
6	10	0	7	2	13	8	23	14	29	20	37

TABLE4 CLEARANCE MEASURING WITH LOAD IN JB/T2781-91 APP.A um

mm Bore Diameter		Radial Clearance Measuring With Load								Load N
mm Bore Diameter		C2		C0		C3		C4		Diameter Series
Over	Incl.	min	max	min	max	min	max	min	max	8	9	0,1,2,3
2.5	10	3	10	6	15	14	24	20	30	4.9	19.6	19.6

1)       C2 is only suitable for P6 or higher;
2)       The deviation of measuring load is 10%;
3)       This table isn’t suitable for 6200 and 6300;
4)       The difference in clearance between the maximum and minimum of the same bearing should conform to the stipulation of Table5.

TABLE5

Tolerance Class	P2	P4	P5	P6	P0
Difference um	2	3	4	4	5

TABLE6 SELECTION OF BEARING CLEARANCE

Operating Condition	Clearance
Clearance fit for inner and outer ring. Low axial load. No axial carrying requirement. Lower vibration and noise. Low speeds.	0-5，3-8，C2
Lower frictional torque. Standard axial load. Average axial load carrying requirements. Slight interference fit for inner ring. Clearance fir for outer ring. Average/low speeds.	5-10，6-12，C0
Extremely low frictional torque. High axial load. High axial load carrying requirements. Heavy interference fit to support high loads or shock loads. Large temperature gradient from inner ring to outer ring. High degree of shaft deflection.	13-20，20-28，C3，C4，C5

BEARING VIBRATION

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TABLE7 JB/T 7047-99 VIBRATION (ACCELERATION) STANDARD dB

mm Bore Diameter	Diameter Series 0				Diameter Series 2					Diameter Series 3
mm Bore Diameter	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	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	30	46	44	40	37	32
12	44	43	39	34	45	43	39	35	30	47	45	40	37	32

Note: Testing in C0 clearance.

TABLE8 JB/T 10187-2000 VIBRATION (VELOCITY) STANDARD um/s

mm Bore Diameter	V			V1			V2			V3			V4
mm Bore Diameter	L	M	H	L	M	H	L	M	H	L	M	H	L	M	H
3	80	44	44	60	35	32	48	26	22	31	16	15	28	10	10
4	80	44	44	60	35	32	48	26	22	31	16	15	28	10	10
5	110	72	60	74	48	40	58	36	30	35	21	18	32	11	11
6	110	72	60	74	48	40	58	36	30	35	21	18	32	11	11
7	130	96	80	92	66	54	72	48	40	44	28	24	38	12	12
8	130	96	80	92	66	54	72	48	40	44	28	24	38	12	12
9	130	96	80	92	66	54	72	48	40	44	28	24	38	12	12
10	160	120	100	120	80	70	90	60	50	55	35	30	45	14	15
12	160	120	100	120	80	70	90	60	50	55	35	30	45	14	15

Note: Testing in diameter series 0,2 or 3 with C0 clearance.

LUBRICATION

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TABLE9 GREASE CHARACTERISTICS

Name

General grease

Diester grease

Silicone grease

Cup grease

Fibre grease

Mobile grease

Mixed base grease

Complex base grease

Non-soap base grease

Thickening agent

Li soap

Ca soap

Na soap

Al soap

Ca+Na soap etc.

Li complex soap etc.

Benton

Silica gel

Urea

Lubricant base

Mineral

Diester

Silicone

Mineral

Mineral or Synthetic oil

Texture

Buttery

Fibrous or Buttery

Buttery

Fibrous or Buttery

Buttery

Fibrous or Buttery

Buttery

Drop point (℃)

170~190

220~260

80~100

160~180

70~90

150~180

180~300

230~

Operating temperature

-30~+120

-50~+130

-50~+180

-10~+70

0~+110

-10~+80

-10~+120

-20~+130

-10~+150

Mechanical stability

Good

Fair

Good

Fair

Good

Fair~Poor

Good

Water resistance

Good

Poor Emulsification

Good

Poor in case of Na

Good

Fair

Good

Pressure resistance

Good

Poor

Good

Good~Poor

Good

Good~Poor

Good

Rust resistance

Good

Poor

Good

Good~Poor

Good

Good~Fair

Good~Poor

Usage

Typical all-purpose grease.

Suitable for low operating temperatures.

Wide operating temperatures.

Water included as a structural stabilizer.

Used with relatively high temperatures.

Suitable for vibration because of its good viscosity.

Suitable for large -sized bearing.

Suitable for high temperatures and heavy loads.

Suitable for high temperatures.

TABLE10 GREASE FILLING VOLUME

SYMBOL		M	S	G	L	Q	K	X
OPERATING CONDITION	SPEED	LOW	LOW	MEDIUM	MEDIUM	MEDIUM	HIGH	HIGH
OPERATING CONDITION	LOAD	HEAVY	MEDIUM	MEDIUM	MEDIUM	MEDIUM	LIGHT	LIGHT
FILLING VOLUME（%）		70±10	50±10	40±10	30±5	25±5	20±5	10±5

Note; Light load (≤0.06Cr),Standard load (≤0.12Cr);
Low speed (dn≤15000 mm^.rpm),High speed (dn＞150000 mm^.rpm).

TABLE11 GREASE BRAND AND CHARACTERISTICS

Manufacturer	Brand	Thickening Agent	Lubricant Base	Drop Point	Consistency	Operating Temperature Range
Shell	Alvania No.2	Lithium	Mineral	182	272	-25~+120
Esso	Andok C	Sodium	Mineral	≥260	205	-20~+120
Kyodo Yushi	Multemp PS No.2	Lithium	Diester Mineral	190	275	-55~+130
Kyodo Yushi	Multemp SRL	Lithium	Ester	191	245	-40~+150
Kluber	Isoflex Super LDS18	Lithium	Diester	190	280	-60~+130
Mobil	Mobil No.28	Benton	Synthetic	≥260	280	-40~+180
Chevron	SRI-2	Urea	Mineral	240	270	-30~+175
HTHS	HTHS			315	250	-30~+200

USAGE OF BEARING

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Bearings are precision parts, you should handle with care. It will not function with rough usage, no matter what high precision bearing you use.
1. FITTING
A bearing can only perform to its full capacity when it is correctly fitted on the shaft and in the housing. Insufficient interference on fitting surface and both shaft and housing are damaged. Furthermore, abrasive particles may enter the bearing causing vibration, excessive heat and damage to raceways. It is therefore necessary to provide bearing rings under rotating load with an adequate interference fit to prevent creep.

TABLE12 CHARACTERISTICS OF LOAD AND FITTING

Rotating Condition

Load Condition