k5 tolerance (shaft, IT5)
Shaft tolerance class k5 per ISO 286-1:2010: fundamental deviation ei 0 … +5, grade IT5 (4 µm at ≤ 3 mm to 27 µm at 400–500 mm). For an exact size, open the calculator with k5 selected.
- Type
- Shaft
- Grade
- IT5
- Tolerance
- 4 … 27 µm
- Fund. deviation
- ei 0 … +5 µm
k5 limits by size range
| Size (mm) | Upper (µm) | Lower (µm) | Ø max (mm) | Ø min (mm) | Upper (mm) | Lower (mm) | Dev. (in) |
|---|---|---|---|---|---|---|---|
| ≤ 3 | +4 | 0 | 3.004 | 3.000 | +0.004 | 0 | +0.00016 / 0 |
| 3 – 6 | +6 | +1 | 6.006 | 6.001 | +0.006 | +0.001 | +0.00024 / +0.00004 |
| 6 – 10 | +7 | +1 | 10.007 | 10.001 | +0.007 | +0.001 | +0.00028 / +0.00004 |
| 10 – 14 | +9 | +1 | 14.009 | 14.001 | +0.009 | +0.001 | +0.00035 / +0.00004 |
| 14 – 18 | +9 | +1 | 18.009 | 18.001 | +0.009 | +0.001 | +0.00035 / +0.00004 |
| 18 – 24 | +11 | +2 | 24.011 | 24.002 | +0.011 | +0.002 | +0.00043 / +0.00008 |
| 24 – 30 | +11 | +2 | 30.011 | 30.002 | +0.011 | +0.002 | +0.00043 / +0.00008 |
| 30 – 40 | +13 | +2 | 40.013 | 40.002 | +0.013 | +0.002 | +0.00051 / +0.00008 |
| 40 – 50 | +13 | +2 | 50.013 | 50.002 | +0.013 | +0.002 | +0.00051 / +0.00008 |
| 50 – 65 | +15 | +2 | 65.015 | 65.002 | +0.015 | +0.002 | +0.00059 / +0.00008 |
| 65 – 80 | +15 | +2 | 80.015 | 80.002 | +0.015 | +0.002 | +0.00059 / +0.00008 |
| 80 – 100 | +18 | +3 | 100.018 | 100.003 | +0.018 | +0.003 | +0.00071 / +0.00012 |
| 100 – 120 | +18 | +3 | 120.018 | 120.003 | +0.018 | +0.003 | +0.00071 / +0.00012 |
| 120 – 140 | +21 | +3 | 140.021 | 140.003 | +0.021 | +0.003 | +0.00083 / +0.00012 |
| 140 – 160 | +21 | +3 | 160.021 | 160.003 | +0.021 | +0.003 | +0.00083 / +0.00012 |
| 160 – 180 | +21 | +3 | 180.021 | 180.003 | +0.021 | +0.003 | +0.00083 / +0.00012 |
| 180 – 200 | +24 | +4 | 200.024 | 200.004 | +0.024 | +0.004 | +0.00094 / +0.00016 |
| 200 – 225 | +24 | +4 | 225.024 | 225.004 | +0.024 | +0.004 | +0.00094 / +0.00016 |
| 225 – 250 | +24 | +4 | 250.024 | 250.004 | +0.024 | +0.004 | +0.00094 / +0.00016 |
| 250 – 280 | +27 | +4 | 280.027 | 280.004 | +0.027 | +0.004 | +0.00106 / +0.00016 |
| 280 – 315 | +27 | +4 | 315.027 | 315.004 | +0.027 | +0.004 | +0.00106 / +0.00016 |
| 315 – 355 | +29 | +4 | 355.029 | 355.004 | +0.029 | +0.004 | +0.00114 / +0.00016 |
| 355 – 400 | +29 | +4 | 400.029 | 400.004 | +0.029 | +0.004 | +0.00114 / +0.00016 |
| 400 – 450 | +32 | +5 | 450.032 | 450.005 | +0.032 | +0.005 | +0.00126 / +0.00020 |
| 450 – 500 | +32 | +5 | 500.032 | 500.005 | +0.032 | +0.005 | +0.00126 / +0.00020 |
Deviations at the upper end of each range (Ø columns use that size); use the calculator for the exact size. — : not defined by ISO 286 for that size. Upper/Lower (mm) and inch columns are shown on wider screens.
About k5
k5 denotes a shaft tolerance zone with transition deviation in the ISO 286 system. It is used in H6/k5 (Precision push fit, e.g. ball-bearing inner rings in instruments.).
At Ø25 mm k5 is +0.011 / +0.002 mm, i.e. 25.002 to 25.011 mm.
How the limits are calculated
k5 uses grade IT5 (a standard tolerance of 9 µm at 18–30 mm). Fundamental deviation: ei is tabulated directly by ISO 286-1 Table 2; es = ei + IT5. See the fundamental deviation table for every letter. Values per ISO 286-1:2010.