尺寸公差与几何精度english

            DIMENSION TOLERANCE AND GEOMETRICAL PRECISION
              The tolerance limit related to needle bearings and cylindrical roller bearings in this book are 
          stipulated as per section 2.3 DIN620. The precision of RTL roller bearings belongs generally to P0 grade.
          For the bearings with of higher precision requirement , the tolerance limit can be reduced to the values
          of Grade P6 and P5 (P4 for thrusting roller bearings) . In RTL needle and cylindrical roller bearings , 
          the radical sectional height is smaller and the walls of inner and outer rings are thinner . Therefore ,
          its geometric shape after assembling is dependent on the geometric shapes of shaft or bearing seats.

Tolerance symbols and definitions
d	Nominal inner diameter
△dmp	Mean inner diameter deviation on the single plane
Vdp	Mean inner diameter variation on the single radical plane	Circularity
Vdmp	The mean inner diameter variation	Parallelism
D	Nominal outer diameter
△Dmp	Mean outer diameter deviation on the single plane
VDp	Mean outer diameter variation on the single radical plane	Circularity
VDmp	Mean outer diameter variation	Parallelism
△Bs	Single inner ring width deviation
VBs	Inner ring width variation	Parallelism
△Cs	Single outer ring width deviation
VCS	Outer ring width variation	Parallelism
Kia	Inner ring radical skip of the bearing set	Radical skip
Kea	Outer ring radical skip of the bearing set	Radical skip
Sd	End surface skip to the inner hole	End face skip
SD	Slope variation of the outer surface bus bar related to basic face	End face skip
T	Nominal height of the single directional thrusting bearing
Si	Thickness variation of the bearing tray to the ground face
Se	Thickness variation of seat ring tray to ground face

The tolerance limit of centripetal bearings

                   Table 18（μm）

D m m		△ dmp Warp		Vdp (O)2) Diameter series			Vdmp (//)	Kia ( ↗ )	△ Bs Warp		VBs (//)
				Vdp (O)2) Diameter series
				8.9	0	2.3
Exceed	To	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
120	180	0	-25	31	31	19	19	30	0	-250	30
180	250	0	-30	38	38	23	23	40	0	-300	30
250	315	0	-35	44	44	26	26	50	0	-350	35
315	400	0	-40	50	50	30	30	60	0	-400	40
400	500	0	-45	56	56	34	34	65	0	-450	50
500	630	0	-50	63	63	38	38	70	0	-500	60
630	800	0	-75	-	-	-	-	80	0	-750	70
800	1000	0	-100	-	-	-	-	90	0	-1000	80
1000	1250	0	-125	-	-	-	-	100	0	-1250	100
1250	1600	0	-160	-	-	-	-	120	0	-1600	120
1600	2000	0	-200	-	-	-	-	140	0	-2000	140

                       Table 19（μm）

D m m		△ dmp Warp		Vdp (O)2) Diameter series			VDmp 3) (//)	Kea ( ↗ )	△Cs	Vcs (//)
				Vdp (O)2) Diameter series
				8.9	0	2.3
Exceed	To	High	Low	Max.			Max.	Max.
2.51)	6	0	-8	10	8	6	6	15	与同一轴承之内圈的△Bs和VBs相同
6	18	0	-8	10	8	6	6	15
18	30	0	-9	12	9	7	7	15
30	50	0	-11	14	11	8	8	20
50	80	0	-13	16	13	10	10	25
80	120	0	-15	19	19	11	11	35
120	150	0	-18	23	23	14	14	40
150	180	0	-25	31	31	19	19	45
180	250	0	-30	38	38	23	23	50
250	315	0	-35	44	44	26	26	60
315	400	0	-40	50	50	30	30	70
400	500	0	-45	56	56	34	34	80
500	630	0	-50	63	63	38	38	100
630	800	0	-75	94	94	55	55	120
800	1000	0	-100	125	125	75	75	140
1000	1250	0	-125	-	-	-	-	160
1250	1600	0	-160	-	-	-	-	190
1600	2000	0	-200	-	-	-	-	220
2000	2500	0	-250	-	-	-	-	250

                   Table 20（μm）

D m m		△ dmp Warp		Diameter series			Vdmp (//)	Kia ( ↗ )	△ Bs 偏差 Warp		VBs (//)
				Diameter series
				8.9	0	2.3
Exceed	To	High	低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	-12	13	10	8	8	10	0	-120	20
50	80	0	-10	15	15	9	9	10	0	-150	25
80	120	0	-15	19	19	11	11	13	0	-200	25
120	180	0	-18	23	23	14	14	18	0	-250	30
180	250	0	-22	28	28	17	17	20	0	-300	30
250	315	0	-25	31	31	19	19	25	0	-350	35
315	400	0	-30	38	38	23	23	30	0	-400	40
400	500	0	-35	44	44	26	26	35	0	-450	45
500	630	0	-40	50	50	30	30	40	0	-500	50

Table 21（μm）

D m m		△ dmp Warp		Vdp (O)2) Diameter series			VDmp 3) (//)	Kea ( ↗ )	△Cs	Vcs (//)
				Vdp (O)2) Diameter series
				8.9	0	2.3
Exceed	To	High	Low	Max.			Max.	Max.
2.51)	6	0	-7	9	7	5	5	8	与同一轴承之内圈的△Bs和VBs相同
6	18	0	-7	9	7	5	5	8
18	30	0	-8	10	8	6	6	9
30	50	0	-9	11	9	7	7	10
50	80	0	-11	14	11	8	8	13
80	120	0	-13	16	16	10	10	18
120	150	0	-15	19	19	11	11	20
150	180	0	-18	23	23	14	14	23
180	250	0	-20	25	25	15	15	25
250	315	0	-25	31	31	19	19	30
315	400	0	-28	35	35	21	21	35
400	500	0	-33	41	41	25	25	40
500	630	0	-38	48	48	29	29	50
630	800	0	-45	56	56	34	34	60
800	1000	0	-60	75	75	45	45	70

Table 22（μm）

D m m		△ dmp Warp		Vdp (O)2) Diameter series			Vdmp (//)	Kia ( ↗ )	△ Bs Warp		VBs (//)
				Vdp (O)2) Diameter series
				8.9	0	2.3
超过Exceed	To	High	Low	Max.			Max.	Max.	High	Low	Max.
0.61)	2.5	0	-5	5	4	3	4	7	0	-40	5
2.5	10	0	-5	5	4	3	4	7	0	-120	5
10	18	0	-5	5	4	3	4	7	0	-120	5
18	30	0	-6	6	5	3	4	8	0	-120	5
30	50	0	-8	8	6	4	5	8	0	-120	5
50	80	0	-9	9	7	5	5	8	0	-150	6
80	120	0	-10	10	8	5	6	9	0	-200	7
120	180	0	-13	13	10	7	8	10	0	-250	8
180	250	0	-15	15	12	8	10	11	0	-300	10
250	315	0	-18	18	14	9	13	13	0	-350	13
315	400	0	-23	23	18	12	15	15	0	-400	15

Table 22（μm）

D m m		△ dmp Warp		Vdp (O)2) Diameter series			VDmp 3) (//)	Kea ( ↗ )	△Cs	Vcs (//)
				Vdp (O)2) Diameter series
				8.9	0	2.3
Exceed	To	High	Low	Max.			Max.	Max.
2.51)	6	0	-5	5	4	3	5	8	与同一轴承之内圈的△Bs相同	5
6	18	0	-5	5	4	3	5	8		5
18	30	0	-6	6	5	3	6	8		5
30	50	0	-7	7	5	4	7	8		5
50	80	0	-9	9	7	5	8	8		6
80	120	0	-10	10	8	5	10	9		8
120	150	0	-11	11	8	6	11	10		8
150	180	0	-13	13	10	7	13	10		8
180	250	0	-15	15	11	8	15	11		10
250	315	0	-18	18	14	9	18	13		11
315	400	0	-20	20	15	10	20	13		13
400	500	0	-20	23	17	12	23	15		15
500	630	0	-28	28	21	14	25	18		18
630	800	0	-35	35	26	18	30	20		20

The tolerance limit of the thrust bearings

Table 24 tolerance limit of the bearing ring aperture (tolerance value μm )

D m m		P0（标准级）,P6和P5级公差			P4级公差
D m m		dmp Warp		Vdp (O)1)	△ dmp Warp		Vdp (O)1)
Exceed	To	High	Low	Max.	High	Low	Max.
-	18	0	-8	6	0	-7	5
18	30	0	-10	8	0	-8	6
30	50	0	-12	9	0	-10	8
50	80	0	-15	11	0	-12	9
80	120	0	-20	15	0	-15	11
120	180	0	-25	19	0	-18	14
180	250	0	-30	23	0	-22	17
250	315	0	-35	26	0	-25	19
315	400	0	-40	30	0	-30	23
400	500	0	-45	34	0	-35	26
500	630	0	-50	38	0	-40	30
630	800	0	-75	-	0	-50	-
800	1000	0	-100	-	0	-	-
1000	1250	0	-125	-	0	-	-

1)Vdp数值的一半。

Table 25 the tolerance limit of the seat ring outer diametetar (tolerance value μm )

D m m		P0（标准级）,P6和P5级公差			P4级公差
D m m		dmp Warp		Vdp (O)1)	△ dmp Warp		Vdp (O)1)
Exceed	To	High	Low	Max.	High	Low	Max.
10	18	0	-11	8	0	-7	5
18	30	0	-13	10	0	-8	6
30	50	0	-16	12	0	-9	7
50	80	0	-19	14	0	-19	8
80	120	0	-22	17	0	-13	10
120	180	0	-25	19	0	-15	11
180	250	0	-30	23	0	-20	15
250	315	0	-35	26	0	-25	19
315	400	0	-40	30	0	-28	21
400	500	0	-45	34	0	-33	25
500	630	0	-50	38	0	-38	29
630	800	0	-75	55	0	-45	34
800	1000	0	-100	75	0	-	-
1000	1250	0	-125	-	0	-	-
1250	1600	0	-160	-	0	-	-

1)Vdp数值的一半。

表26 轴圈和座圈厚度变动量（公差值）

D m m		SiSi Grade diameter				Se Grade diameter
D m m		Standard diameter	P6	P5	P4	P0(Standard diameter),P6,P5,P4
Exceed	To	Max.	Max.	Max.	Max.	P0(Standard diameter),P6,P5,P4
-	18	10	5	3	2	与同一轴承之轴圈的Si相同
18	30	10	5	3	2
30	50	10	6	3	2
50	80	10	7	4	3
80	120	15	8	4	3
120	180	15	9	5	4
180	250	20	10	5	4
250	315	25	13	7	5
315	400	30	15	7	5
400	500	30	18	9	6
500	630	35	21	11	7
630	800	40	25	13	8
800	1000	45	30	15	-
1000	1250	50	35	18	-

Table 27 The tolerance limit of the bearing height (tolerance value μm )

D m m		T 偏差 Warp
Exceed	To	High	Low
-	30	+20	-250
30	50	+20	-250
50	80	+20	-300
80	120	+25	-300
120	180	+25	-400
180	250	+30	-400
250	315	+40	-400
315	400	+40	-500
400	500	+50	-500
500	630	+60	-600
630	800	+70	-750
800	1000	+80	-1000
1000	1250	+100	-1400