Page 1579 - MISUMI Thailand Economy Series

[Technical Data] [Technical Data]
Hardness Conversion Table (SAEJ417) *Revised in 1983 Regular Machining Dimension Tolerance Excerpts from JIS B 0405, 0419(1991)

Approximate Conversion of Rockwell C Hardness Values for Steel (1) 1. Regular Cut Dimension Tolerance B 0405－1991－
Brinell Hardness (HB) Rockwell Superficial Hardness Tensile Strength Rockwell
10mm Ball ,
(HRC) (HV) Load 3000kgf Rockwell Hardness (3) Diamond Cone Indenter (Hs) (Approximated Value) C-Scale Tolerances in Respect of Length Excluding Chamfered Portion Unit: mm
Rockwell Vickers Shore Tolerance Class Classification of Reference Dimension
C-Scale Tungsten (HRA) A (HRB) B Scale, (HRD) D Scale, 15－N 30－N 45－N MPa Hardness
Hardness Hardness Standard Carbide Scale, Load Load100kgf, Load 100kgf, Scale Load Scale Load Scale Load Hardness (kgf/mm 2 ) C
Sphere Sphere 60kgf,Diamond Diameter1.6mm Diamond Cone 15kgf 30kgf 45kgf (2) (3) 0.5 ( ) or More More than 3 More than 6 More than 30 More than 120 More than 400 More than 1000 More than 2000
1
Cone Indenter (1/16in)Sphere
Indenter
Symbol Description 3 or Less 6 or Less 30 or Less 120 or Less 400 or Less 1000 or Less 2000 or Less 4000 or Less
68 940 － － 85.6 － 76.9 93.2 84.4 75.4 97 － 68
67 900 － － 85.0 － 76.1 92.9 83.6 74.2 95 － 67 Tolerance
66 865 － － 84.5 － 75.4 92.5 82.8 73.3 92 － 66 f Precision Grade Ú0.05 Ú0.05 Ú0.1 Ú0.15 Ú0.2 Ú0.3 Ú0.5 一
65 832 － (739) 83.9 － 74.5 92.2 81.9 72.0 91 － 65 m Medium Ú0.1 Ú0.1 Ú0.2 Ú0.3 Ú0.5 Ú0.8 Ú1.2 Ú2
64 800 － (722) 83.4 － 73.8 91.8 81.1 71.0 88 － 64
c Coarse Ú0.2 Ú0.3 Ú0.5 Ú0.8 Ú1.2 Ú2 Ú3 Ú4
63 772 － (705) 82.8 － 73.0 91.4 80.1 69.9 87 － 63 v Extremely Coarse 一 Ú0.5 Ú1 Ú1.5 Ú2.5 Ú4 Ú6 Ú8
62 746 － (688) 82.3 － 72.2 91.1 79.3 68.8 85 － 62
1
61 720 － (670) 81.8 － 71.5 90.7 78.4 67.7 83 － 61 Note ( ) : A reference dimension less than 0.5 mm is followed by a tolerance.
60 697 － (654) 81.2 － 70.7 90.2 77.5 66.6 81 － 60
59 674 － (634) 80.7 － 69.9 89.8 76.6 65.5 80 － 59
58 653 － 615 80.1 － 69.2 89.3 75.7 64.3 78 － 58 2.Tolerances in Respect of the Length of the Chamfered Portion 3. Angle Tolerance
57 633 － 595 79.6 － 68.5 88.9 74.8 63.2 76 － 57 (Radius of rounding for edges and edge chamfering dimension)
56 613 － 577 79.0 － 67.7 88.3 73.9 62.0 75 － 56
55 595 － 560 78.5 － 66.9 87.9 73.0 60.9 74 2075 (212) 55 Unit: mm Unit: mm
54 577 － 543 78.0 － 66.1 87.4 72.0 59.8 72 2015 (205) 54
Tolerance Class Classification of Reference Dimension Tolerance Class
53 560 － 525 77.4 － 65.4 86.9 71.2 58.5 71 1950 (199) 53 Length of Shorter Side (Unit: mm)
2
52 544 (500) 512 76.8 － 64.6 86.4 70.2 57.4 69 1880 (192) 52 0.5 ( ) or
51 528 (487) 496 76.3 － 63.8 85.9 69.4 56.1 68 1820 (186) 51 More More than 3 More than 6 More than 10 More than 50 More than 120
6 or Less
50 513 (475) 481 75.9 － 63.1 85.5 68.5 55.0 67 1760 (179) 50 Symbol Description 3 or Less Symbol Description 10 or Less 50 or Less 120 or Less 400 or Less More than 400
49 498 (464) 469 75.2 － 62.1 85.0 67.6 53.8 66 1695 (173) 49
Tolerance Tolerance
48 484 451 455 74.7 － 61.4 84.5 66.7 52.5 64 1635 (167) 48 f Precision Grade f Precision Grade
47 471 442 443 74.1 － 60.8 83.9 65.8 51.4 63 1580 (161) 47 Ú0.2 Ú0.5 Ú1 Ú1B Ú30V Ú20V Ú10V Ú 5V
46 458 432 432 73.6 － 60.0 83.5 64.8 50.3 62 1530 (156) 46 m Medium m Medium
45 446 421 421 73.1 － 59.2 83.0 64.0 49.0 60 1480 (151) 45 c Coarse c Coarse Ú1B 30V Ú 1B Ú30V Ú15V Ú10V
44 434 409 409 72.5 － 58.5 82.5 63.1 47.8 58 1435 (146) 44 Ú0.4 Ú1 Ú2
v Extremely Coarse v Extremely Coarse Ú3B Ú 2B Ú 1B Ú30V Ú20V
43 423 400 400 72.0 － 57.7 82.0 62.2 46.7 57 1385 (141) 43 Note ( ) : A reference dimension less than 0.5
2
42 412 390 390 71.5 － 56.9 81.5 61.3 45.5 56 1340 (136) 42 mm is followed by a tolerance.
41 402 381 381 70.9 － 56.2 80.9 60.4 44.3 55 1295 (132) 41
40 392 371 371 70.4 － 55.4 80.4 59.5 43.1 54 1250 (127) 40
39 382 362 362 69.9 － 54.6 79.9 58.6 41.9 52 1215 (124) 39
4.Regular Perpendicularity Tolerance B 0419－1991－ Unit: mm
38 372 353 353 69.4 － 53.8 79.4 57.7 40.8 51 1180 (120) 38
37 363 344 344 68.9 － 53.1 78.8 56.8 39.6 50 1160 (118) 37 Nominal Length of Shorter Side
36 354 336 336 68.4 (109.0) 52.3 78.3 55.9 38.4 49 1115 (114) 36
35 345 327 327 67.9 (108.5) 51.5 77.7 55.0 37.2 48 1080 (110) 35 Tolerance Class 100 or Less More than 100 More than 300 More than 1000
34 336 319 319 67.4 (108.0) 50.8 77.2 54.2 36.1 47 1055 (108) 34 300 or Less 1000 or Less 3000 or Less
33 327 311 311 66.8 (107.5) 50.0 76.6 53.3 34.9 46 1025 (105) 33 Perpendicularity Tolerance
32 318 301 301 66.3 (107.0) 49.2 76.1 52.1 33.7 44 1000 (102) 32 H 0.2 0.3 0.4 0.5
31 310 294 294 65.8 (106.0) 48.4 75.6 51.3 32.7 43 980 (100) 31 K 0.4 0.6 0.8 1
30 302 286 286 65.3 (105.5) 47.7 75.0 50.4 31.3 42 950 ( 97) 30
29 294 279 279 64.7 (104.5) 47.0 74.5 49.5 30.1 41 930 ( 95) 29 L 0.6 1 1.5 2
28 286 271 271 64.3 (104.0) 46.1 73.9 48.6 28.9 41 910 ( 93) 28
27 279 264 264 63.8 (103.0) 45.2 73.3 47.7 27.8 40 880 ( 90) 27
26 272 258 258 63.3 (102.5) 44.6 72.8 46.8 26.7 38 860 ( 88) 26 5. Regular Straightness and Flatness Tolerance Unit: mm
25 266 253 253 62.8 (101.5) 43.8 72.2 45.9 25.5 38 840 ( 86) 25
24 260 247 247 62.4 (101.0) 43.1 71.6 45.0 24.3 37 825 ( 84) 24 Nominal Length
23 254 243 243 62.0 100.0 42.1 71.0 44.0 23.1 36 805 ( 82) 23 Tolerance Class 10 or Less More than 10 More than 30 More than 100 More than 300 More than 1000
30 or Less
1000 or Less
300 or Less
100 or Less
3000 or Less
22 248 237 237 61.5 99.0 41.6 70.5 43.2 22.0 35 785 ( 80) 22
21 243 231 231 61.0 98.5 40.9 69.9 42.3 20.7 35 770 ( 79) 21 Regular Straightness and Flatness Tolerance
20 238 226 226 60.5 97.8 40.1 69.4 41.5 19.6 34 760 ( 77) 20
(18) 230 219 219 － 96.7 － － － － 33 730 ( 75) (18) H 0.02 0.05 0.1 0.2 0.3 0.4
K 0.05 0.1 0.2 0.4 0.6 0.8
(16) 222 212 212 － 95.5 － － － － 32 705 ( 72) (16) L 0.1 0.2 0.4 0.8 1.2 1.6
(14) 213 203 203 － 93.9 － － － － 31 675 ( 69) (14)
(12) 204 194 194 － 92.3 － － － － 29 650 ( 66) (12)
(10) 196 187 187 － 90.7 － － － － 28 620 ( 63) (10)
( 8) 188 179 179 － 89.5 － － － － 27 600 ( 61) ( 8)
6.Regular Symmetry Tolerance Unit: mm
( 6) 180 171 171 － 87.1 － － － － 26 580 ( 59) ( 6)
( 4) 173 165 165 － 85.5 － － － － 25 550 ( 56) ( 4) Nominal Length
( 2) 166 158 158 － 83.5 － － － － 24 530 ( 54) ( 2)
( 0) 160 152 152 － 81.7 － － － － 24 515 ( 53) ( 0) Tolerance Class 100 or Less More than 100 More than 300 More than 1000
300 or Less
1000 or Less
Symmetry Tolerance
H 0.5
K 0.6 0.8 1
L 0.6 1 1.5 2
1573 1574

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