Technical Parameters - Precision

Now the Precision of “U&J” bearing can be divide into three grades: common quality P0 class, P6 class, and P5 class.

Table 3
The contrast of bearing precision grade

国 家	Standard	精度等级 Precision Grade
中国	GB	0	6	5	4	2
国标准化组织	ISO	0	6	5	4	2
瑞典	SKF	P0	P6	P5	P4	P2
德国	DIN	P0	P6	P5	P4	P2
日本	JIS	P0	P6	P5	P4	P2
美国	ANSI	ABEC1	ABEC3	ABEC5	ABEC7	ABEC9

Table 4

Inner Ring of 0 Grade Tolerance
d mm		△dmp		Vdp(2)			Vdmp	Kia	△Bs			VBs
				直径系列
				9	0,1	2,3,4			全部	正常	修正(3)
超过	到	上偏差	下偏差	max			max	max	上偏差	下偏差		max
0.6(1)	2.5	0	-8	10	8	6	6	10	0	-40	-	12
2.5	10	0	-8	10	8	6	6	10	0	-120	-250	15
10	18	0	-8	10	8	6	6	10	0	-120	-250	20
18	30	0	-10	13	10	8	8	13	0	-120	-250	20
30	50	0	-12	15	12	9	9	15	0	-120	-250	20
50	80	0	-15	19	19	11	11	20	0	-150	-380	25

Note: (1)Including 0.6
(2)Diameter series 7 and 8, no regular cost
(3)Indicating the single internal ring of the bearing to be used in pair or group during installation

Table 5

Out Ring of 0 Grade Tolerance
D mm		△Dmp		Vdp(2)(4)				Vdmp	Kea	△Cs			VCs
				开式轴承 闭式轴承(3)
				直径系列
				9	0,1	2,3,4	2,3,4			全部	正常	修正(3)
超过	到	上偏差	下偏差	max				max	max	上偏差	下偏差		max
2.5(1)	6	0	-8	10	8	6	10	6	15	与同一轴承内圈的△Bs及VBs相同
6	18	0	-8	10	8	6	10	6	15
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	26	11	35

Note: (1)Including 2.5
(2)Diameter series 7 and 8, no regular cost
(3)Diameter series 9，0 and 1, no regular cost
(4)Suitable for inside and outside brake ring befor installation or after discharge

Table 6

Inner Ring of 6 Grade Tolerance
d mm		△dmp		Vdp(2)			Vdmp	Kia	△Bs			VBs
				直径系列
				9	0,1	2,3,4			全部	正常	修正(3)
超过	到	上偏差	下偏差	max			max	max	上偏差	下偏差		max
0.6(1)	2.5	0	-7	9	7	5	5	5	0	-40	-	12
2.5	10	0	-7	9	7	5	5	5	0	-120	-250	15
10	18	0	-7	9	7	5	5	7	0	-120	-250	20
18	30	0	-8	10	8	6	6	8	0	-120	-250	20
30	50	0	-10	13	10	8	8	10	0	-120	-250	20
50	80	0	-12	15	15	9	9	10	0	-150	-380	25

Note: (1)Including 0.6
(2)Diameter series 7 and 8,no regular cost
(3)Indicating the single internal ring of the bearing to be used in pair or group during installation

Table 7

Out Ring of 6 Grade Tolerance
D mm		△Dmp		Vdp(2)(4)				Vdmp	Kea	△Cs			VCs
				开式轴承 闭式轴承(3)
				直径系列
				9	0,1	2,3,4	2,3,4			全部	正常	修正(3)
超过	到	上偏差	下偏差	max				max	max	上偏差	下偏差		max
2.5(1)	6	0	-7	9	7	5	9	5	8	与同一轴承内圈的△Bs及VBs相同
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

Note: (1)Including 2.5
(2)Diameter series 7 and 8, no regular cost
(3)Diameter series no regular cost
(4)Suitable for inside and outside brake ring befor installation or after discharge

Table 8

Inner Ring of 5 Grade Tolerance
d mm		△dmp		Vdp(2)		Vdmp	Kia	Sd	Sia(3)	△Bs			VBs
				直径系列
				9	0,1,2,3,4					全部	正常	修正(3)
超过	到	上偏差	下偏差	max		max	max	max	max	上偏差	下偏差		max
0.6(1)	2.5	0	-5	5	4	3	4	7	7	0	-40	-250	5
2.5	10	0	-5	5	4	3	4	7	7	0	-40	-250	5
10	18	0	-5	5	4	3	4	7	7	0	-80	-250	5
18	30	0	-6	6	5	3	4	8	8	0	-120	-250	5
30	50	0	-8	8	6	4	5	8	8	0	-120	-250	5
50	80	0	-9	9	7	5	6	8	8	0	-150	-380	6

Note: (1)Including 0.6
(2)Diameter series 7 and 8,no regular cost
(3)Only suitable for groove type ball bearing
(4)Indicating the single internal ring of the bearing to be used in pair or group during installation

Table 9

Out Ring of 5 Grade Tolerance
d mm		△dmp		VDp(2) (3)		Vdmp	Kea	Sd(4)	Sea(4)	△Bs		VBs
				直径系列
				9	0,1,2,3,4
超过	到	上偏差	下偏差	max		max	max	max	max	上偏差	下偏差	max
2.5(1)	6	0	-5	5	4	3	5	8	8	与同一轴承内圈的 △Bs及VBs相同		5
6	18	0	-5	5	4	3	5	8	8			5
18	30	0	-6	6	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

Note: (1)Including 2.5
(2)Diameter series 7 and 8,no regular cost
(3)There is no regular cost in bearing of closed type
(4)Unsuitable for the outside flange of the bearing