| Surface finish symbol |
Preferred sequence of surface roughness | ||
| Ra | Rmax | Rz | |
 |
0.2a | 0.8S | 0.8Z |
 |
1.6a | 6.3S | 6.3Z |
 |
6.3a | 25 S | 25 Z |
 |
25 a | 100 S | 100 Z |
| ～ | Not specified | ||
This table indicates symbols of fit tolerance and preferred values for surface finish
For products out of 500 mm dia, please refer to IT basic tolerance.
●Regular fit tolerance ▼IT(International Tolerance) basic tolerance ▼Preferred values for surface finish symbol (roughness)
| （unit：μm） | |||||||||||||||||||||||||||||||
| Dimension classification（mm） | Permissible dimensional deviation of rod | Permissible dimensional deviation of bore | |||||||||||||||||||||||||||||
| e | f | g | h | E | F | G | H | ||||||||||||||||||||||||
| Above | Or less | e7 | e8 | e9 | f6 | f7 | f8 | g4 | g5 | g6 | h4 | h5 | h6 | h7 | h8 | h9 | E7 | E8 | E9 | F6 | F7 | F8 | G6 | G7 | H5 | H6 | H7 | H8 | H9 | H10 | H11 |
| - | 3 | -14 | -6 | -2 | 0 | +24 | +28 | +39 | +12 | +16 | +20 | +8 | +12 | +4 | +6 | +10 | +14 | +25 | +40 | +60 | |||||||||||
| -24 | -28 | -39 | -12 | -16 | -20 | -5 | -6 | -8 | -3 | -4 | -6 | -10 | -14 | -25 | +14 | +6 | +2 | 0 | |||||||||||||
| 3 | 6 | -20 | -10 | -4 | 0 | +32 | +38 | +50 | +18 | +22 | +28 | +12 | +16 | +5 | +8 | +12 | +18 | +30 | +48 | +75 | |||||||||||
| -32 | -38 | -50 | -18 | -22 | -28 | -8 | -9 | -12 | -4 | -5 | -8 | -12 | -18 | -30 | +20 | +10 | +4 | 0 | |||||||||||||
| 6 | 10 | -25 | -13 | -5 | 0 | +40 | +47 | +61 | +22 | +28 | +35 | +14 | +20 | +6 | +9 | +15 | +22 | +36 | +58 | +90 | |||||||||||
| -40 | -47 | -61 | -22 | -28 | -35 | -9 | -11 | -14 | -4 | -6 | -9 | -15 | -22 | -36 | +25 | +13 | +5 | 0 | |||||||||||||
| 10 14 |
14 18 |
-32 | -16 | -6 | 0 | +50 | +59 | +75 | +27 | +34 | +43 | +17 | +24 | +8 | +11 | +18 | +27 | +43 | +70 | +110 | |||||||||||
| -50 | -59 | -75 | -27 | -34 | -43 | -11 | -14 | -17 | -5 | -8 | -11 | -18 | -27 | -43 | +32 | +16 | +6 | 0 | |||||||||||||
| 18 24 |
24 30 |
-40 | -20 | -7 | 0 | +61 | +73 | +92 | +33 | +41 | +53 | +20 | +28 | +9 | +13 | +21 | +33 | +52 | +84 | +130 | |||||||||||
| -61 | -73 | -92 | -33 | -41 | -53 | -13 | -16 | -20 | -6 | -9 | -13 | -21 | -33 | -52 | +40 | +20 | +7 | 0 | |||||||||||||
| 30 40 |
40 50 |
-50 | -25 | -9 | 0 | +75 | +89 | +112 | +41 | +50 | +64 | +25 | +34 | +11 | +16 | +25 | +39 | +62 | +100 | +160 | |||||||||||
| -75 | -89 | -112 | -41 | -50 | -64 | -16 | -20 | -25 | -7 | -11 | -16 | -25 | -39 | -62 | +50 | +25 | +9 | 0 | |||||||||||||
| 50 65 |
65 80 |
-60 | -30 | -10 | 0 | +90 | +106 | +134 | +49 | +60 | +76 | +29 | +40 | +13 | +19 | +30 | +46 | +74 | +120 | +190 | |||||||||||
| -90 | -106 | -134 | -49 | -60 | -76 | -18 | -23 | -29 | -8 | -13 | -19 | -30 | -46 | -74 | +60 | +30 | +10 | 0 | |||||||||||||
| 80 100 |
100 120 |
-72 | -36 | -12 | 0 | +107 | +126 | +159 | +58 | +71 | +90 | +34 | +47 | +15 | +22 | +35 | +54 | +87 | +140 | +220 | |||||||||||
| -107 | -126 | -159 | -58 | -71 | -90 | -22 | -27 | -34 | -10 | -15 | -22 | -35 | -54 | -87 | +72 | +36 | +12 | 0 | |||||||||||||
| 120 140 160 |
140 160 180 |
-85 | -43 | -14 | 0 | +125 | +148 | +185 | +68 | +83 | +106 | +39 | +54 | +18 | +25 | +40 | +63 | +100 | +160 | +250 | |||||||||||
| -125 | -148 | -185 | -68 | -83 | -106 | -26 | -32 | -39 | -12 | -18 | -25 | -40 | -63 | -100 | +85 | +43 | +14 | 0 | |||||||||||||
| 180 200 225 |
200 225 250 |
-100 | -50 | -15 | 0 | +146 | +172 | +215 | +79 | +96 | +122 | +44 | +61 | +20 | +29 | +46 | +72 | +115 | +185 | +290 | |||||||||||
| -146 | -172 | -215 | -79 | -96 | -122 | -29 | -35 | -44 | -14 | -20 | -29 | -46 | -72 | -115 | +100 | +50 | +15 | 0 | |||||||||||||
| 250 280 |
280 315 |
-110 | -56 | -17 | 0 | +162 | +191 | +240 | +88 | +108 | +137 | +49 | +69 | +23 | +32 | +52 | +81 | +130 | +210 | +320 | |||||||||||
| -162 | -191 | -240 | -88 | -108 | -137 | -33 | -40 | -49 | -16 | -23 | -32 | -52 | -81 | -130 | +110 | +56 | +17 | 0 | |||||||||||||
| 315 355 |
355 400 |
-125 | -62 | -18 | 0 | +182 | +214 | +265 | +98 | +119 | +151 | +54 | +75 | +25 | +36 | +57 | +89 | +140 | +230 | +360 | |||||||||||
| -182 | -214 | -265 | -98 | -119 | -151 | -36 | -43 | -54 | -18 | -25 | -36 | -57 | -89 | -140 | +125 | +62 | +18 | 0 | |||||||||||||
| 400 450 |
450 500 |
-135 | -68 | -20 | 0 | +198 | +232 | +290 | +108 | +131 | +165 | +60 | +83 | +27 | +40 | +63 | +97 | +155 | +250 | +400 | |||||||||||
| -198 | -232 | -290 | -108 | -131 | -165 | -40 | -47 | -60 | -20 | -27 | -40 | -63 | -97 | -155 | +135 | +68 | +20 | 0 | |||||||||||||
●IT(International Tolerance) basic tolerance ▲Regular fit tolerance ▼Preferred values for surface finish symbol (roughness)
| Tolerance class | Standard number | Basic tolerance unit:μｍ | 基本公差 単位：mｍ | |||||||||||
| Dimension classification | E e |
F f |
G g |
H h |
IT6 6Class |
IT7 7Class |
IT8 8Class |
IT9 9Class |
IT10 10Class |
IT11 11Class |
IT12 12Class |
IT13 12Class |
IT14 14Class |
|
| Above | Or less | |||||||||||||
| 500 | 630 | +145 -145 |
+76 -76 |
+22 -22 |
0 0 |
44 | 70 | 110 | 175 | 280 | 0.44 | 0.7 | 1.1 | 1.75 |
| 630 | 800 | +160 -160 |
+80 -80 |
+24 -24 |
0 0 |
50 | 80 | 125 | 200 | 320 | 0.5 | 0.8 | 1.25 | 2 |
| 800 | 1000 | +170 -170 |
+86 -86 |
+26 -26 |
0 0 |
56 | 90 | 140 | 230 | 360 | 0.56 | 0.9 | 1.4 | 2.3 |
| 1000 | 1250 | +195 -195 |
+98 -98 |
+28 -28 |
0 0 |
66 | 105 | 165 | 260 | 420 | 0.66 | 1.05 | 1.65 | 2.6 |
| 1250 | 1600 | +220 -220 |
+110 -110 |
+30 -30 |
0 0 |
78 | 125 | 195 | 310 | 500 | 0.78 | 1.25 | 1.95 | 3.1 |
| 1600 | 2000 | +240 -240 |
+120 -120 |
+32 -32 |
0 0 |
92 | 150 | 230 | 370 | 600 | 0.92 | 1.5 | 2.3 | 3.7 |
●Preferred values for surface finish symbol (roughness) ▲Regular fit tolerance ▲IT(International Tolerance) basic tolerance
| Surface finish symbol |
Preferred sequence of surface roughness | ||
| Ra | Rmax | Rz | |
|
0.2a | 0.8S | 0.8Z |
|
1.6a | 6.3S | 6.3Z |
|
6.3a | 25 S | 25 Z |
|
25 a | 100 S | 100 Z |
| ～ | Not specified | ||