Printed from Kezuriba (kezuriba.net/en/fits/shaft-js7/)
js7 tolerance (shaft) — limit deviations
Upper and lower limit deviations of shaft tolerance class js7 (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 js7 shaft must be between 24.989 and 25.011 mm.
▤js7 limit deviations (µm)
| Nominal size (mm) | Upper | Lower | Tolerance | Calc |
|---|---|---|---|---|
| up to 3 | +5 | −5 | 10 | → |
| over 3 to 6 | +6 | −6 | 12 | → |
| over 6 to 10 | +7.5 | −7.5 | 15 | → |
| over 10 to 14 | +9 | −9 | 18 | → |
| over 14 to 18 | +9 | −9 | 18 | → |
| over 18 to 24 | +10.5 | −10.5 | 21 | → |
| over 24 to 30 | +10.5 | −10.5 | 21 | → |
| over 30 to 40 | +12.5 | −12.5 | 25 | → |
| over 40 to 50 | +12.5 | −12.5 | 25 | → |
| over 50 to 65 | +15 | −15 | 30 | → |
| over 65 to 80 | +15 | −15 | 30 | → |
| over 80 to 100 | +17.5 | −17.5 | 35 | → |
| over 100 to 120 | +17.5 | −17.5 | 35 | → |
| over 120 to 140 | +20 | −20 | 40 | → |
| over 140 to 160 | +20 | −20 | 40 | → |
| over 160 to 180 | +20 | −20 | 40 | → |
| over 180 to 200 | +23 | −23 | 46 | → |
| over 200 to 225 | +23 | −23 | 46 | → |
| over 225 to 250 | +23 | −23 | 46 | → |
| over 250 to 280 | +26 | −26 | 52 | → |
| over 280 to 315 | +26 | −26 | 52 | → |
| over 315 to 355 | +28.5 | −28.5 | 57 | → |
| over 355 to 400 | +28.5 | −28.5 | 57 | → |
| over 400 to 450 | +31.5 | −31.5 | 63 | → |
| over 450 to 500 | +31.5 | −31.5 | 63 | → |
Note: Sources split into two styles: exactly half of IT7 (±7.5, ±10.5 …), used here, and values rounded down (±7, ±10 …).
⊂⊃Common fits that use this class
Partners of js7 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
- Miki Pulley mikipulley.co.jpmikipulley.co.jp
- KHK (Kohara Gear) khkgears.co.jpkhkgears.co.jp