Printed from Kezuriba (kezuriba.net/en/fits/shaft-h8/)
h8 tolerance (shaft) — limit deviations
Upper and lower limit deviations of shaft tolerance class h8 (shafts use lower-case letters), in µm (0.001 mm). Add them to the nominal size to get the permitted size range. Example: a Ø25 h8 shaft must be between 24.967 and 25.000 mm.
▤h8 limit deviations (µm)
| Nominal size (mm) | Upper | Lower | Tolerance | Calc |
|---|---|---|---|---|
| up to 3 | ±0 | −14 | 14 | → |
| over 3 to 6 | ±0 | −18 | 18 | → |
| over 6 to 10 | ±0 | −22 | 22 | → |
| over 10 to 14 | ±0 | −27 | 27 | → |
| over 14 to 18 | ±0 | −27 | 27 | → |
| over 18 to 24 | ±0 | −33 | 33 | → |
| over 24 to 30 | ±0 | −33 | 33 | → |
| over 30 to 40 | ±0 | −39 | 39 | → |
| over 40 to 50 | ±0 | −39 | 39 | → |
| over 50 to 65 | ±0 | −46 | 46 | → |
| over 65 to 80 | ±0 | −46 | 46 | → |
| over 80 to 100 | ±0 | −54 | 54 | → |
| over 100 to 120 | ±0 | −54 | 54 | → |
| over 120 to 140 | ±0 | −63 | 63 | → |
| over 140 to 160 | ±0 | −63 | 63 | → |
| over 160 to 180 | ±0 | −63 | 63 | → |
| over 180 to 200 | ±0 | −72 | 72 | → |
| over 200 to 225 | ±0 | −72 | 72 | → |
| over 225 to 250 | ±0 | −72 | 72 | → |
| over 250 to 280 | ±0 | −81 | 81 | → |
| over 280 to 315 | ±0 | −81 | 81 | → |
| over 315 to 355 | ±0 | −89 | 89 | → |
| over 355 to 400 | ±0 | −89 | 89 | → |
| over 400 to 450 | ±0 | −97 | 97 | → |
| over 450 to 500 | ±0 | −97 | 97 | → |
⊂⊃Common fits that use this class
Partners of h8 in the preferred fits of JIS B 0401 (1998), the Japanese counterpart of ISO 286. Click one to open it in the calculator.
📚Sources
We compared the technical documents below and use values that agree in at least two of them.
- MISUMI jp.misumi-ec.com
- NBK (Nabeya Bi-tech) fujiikougyou.sakura.ne.jpfujiikougyou.sakura.ne.jpfujiikougyou.sakura.ne.jp
- Mitsubishi Materials mitsubishicarbide.netmitsubishicarbide.net
- OSG osg.co.jp
- Tungaloy tungaloy.com
- NSK nsk.com
- Miki Pulley mikipulley.co.jpmikipulley.co.jp
- Tsubakimoto Chain tt-net.tsubakimoto.co.jp
- KHK (Kohara Gear) khkgears.co.jpkhkgears.co.jp