ISO Tolerance
Calculator
Shaft tolerance calculation per ISO 286 standard. Min/max diameter values for h6-h11 classes.
Calculator
Calculate Shaft Tolerance
Reference Table
IT Tolerance Values (μm)
| Dia. Range (mm) | IT6 | IT7 | IT8 | IT9 | IT10 | IT11 |
|---|---|---|---|---|---|---|
| 1 - 3 | 6 | 10 | 14 | 25 | 40 | 60 |
| 3 - 6 | 8 | 12 | 18 | 30 | 48 | 75 |
| 6 - 10 | 9 | 15 | 22 | 36 | 58 | 90 |
| 10 - 18 | 11 | 18 | 27 | 43 | 70 | 110 |
| 18 - 30 | 13 | 21 | 33 | 52 | 84 | 130 |
| 30 - 50 | 16 | 25 | 39 | 62 | 100 | 160 |
| 50 - 80 | 19 | 30 | 46 | 74 | 120 | 190 |
| 80 - 120 | 22 | 35 | 54 | 87 | 140 | 220 |
| 120 - 180 | 25 | 40 | 63 | 100 | 160 | 250 |
| 180 - 250 | 29 | 46 | 72 | 115 | 185 | 290 |
| 250 - 315 | 32 | 52 | 81 | 130 | 210 | 320 |
| 315 - 400 | 36 | 57 | 89 | 140 | 230 | 360 |
* IT tolerance values per ISO 286-1 (microns). For 'h' shaft tolerance, upper deviation is always 0.
About Tolerance Classes
Shaft 'h' Tolerance
- h6: Precision sliding fit, bearing seats
- h7: Sliding fit, piston rods
- h8: Free running fit
- h9: General machine parts, post hot-rolling
- h10: Coarse fit
- h11: Hot rolled tolerance, structural parts
Applications
- h6-h7: Bright bar, ground shaft
- h8-h9: Cold drawn steel bar
- h9-h11: Peeled steel, hot rolled
- At Aktif Celik we supply bright steel in h7-h11 tolerances.
Precision Tolerance Steel Bar Supply
Cold drawn, peeled, and ground steel bars in h7, h9, h11 tolerances. Production per EN 10278 standard.
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