KENTIE Ball Bearings Accuracy Clearance Vibration and Noise0 pages

نسخه متنی

D filll Accuracy

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Bearing's precision means dimension accuracy and running accuracy, international grade of

bearing is divided into: PO, P6, P5, P4, P2, and or equivalently adopts ISO standard. Different

precision glade's comparison see as follows:

ffl^^l5^tP.§56: Comparison table of accuracy grade

am Country	Standard	watts Accuracy Grad
China	GB307-84	B	C	D	E	G_I
China	GB/T307.1-94	2	4	5	6	0
International Standard Organization	ISO	2	4	5	6	0
Japan	JIS	2	*	5	6	0 \|
U.S.A	ANSI	ABEC9	ABEC7	ABEC5	ABEC3	ABEC1
Germany	DIN	P;	P4	Ps	P.	Po
Sweden	SKF	P2	Ps	P.	Po

□ ifSBS Clearance

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Bearing interna! clearance is defined as the total distance through which one bearing ring can

be moved relative to the other. The operational clearance of a bearing has great influence on the

running condition, lift, vibration level, noise value, and the rmal expansion of bearing. Following

table give the clearance for the various bearing types in the conditions of without pre-load.

Radial internal clearance of deep groove ball bearings (including cylindrical

bore)

Note: C2 group clearance only for bearing over 6 grade accuracy

Lg Town, Dongguan, Guangdong, China

Fax: 86-0769-81909108

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DONGGUAN KENTIE BEARING CO.,LTD.

Mrfj^^m Vibration and Noise

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The vibration and noise of bearings are classified in three classes as Z1. Z2 and Z3 , it is measured

by the instrument of S0910-1. For special requirement, it is measured by BVT-1 and classified as

V1> V2andV3.

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