Contact: Manager Xu
Mobile: 18151178581
Website:www.kslekou.com
Address: No.3 Workshop, No.77 Kangzhuang Road, Zhoushi Town, Kunshan City, Suzhou
Standard for Diameter Limit Deviation h10 of Cylindrical Pins
h10 is the standard tolerance for the reference axis of cylindrical pins or taper pins (referring to the international standard ISO 286‑2). The core points are:
Upper Deviation (ES) = 0
Lower Deviation (EI) = −IT10
Tolerance Value = IT10
h: The fundamental deviation code for shafts (always lowercase). The upper deviation of the shaft is constantly 0 (datum shaft).
10: Tolerance grade IT10 (medium-low precision, within the range of IT01-IT18).
Upper Deviation: ES = 0
Lower Deviation: EI = −IT10
Dimension Range: Nominal Size + ei ≤ Actual Size ≤ Nominal Size + es
3. h10 Tolerance Table for Common Size Ranges
| Nominal Size Range (mm) | IT10 (μm) | h10 Upper Deviation es (μm) | h10 Lower Deviation ei (μm) |
| > 0 ~ 3 | 40 | 0 | -40 |
| > 3 ~ 6 | 48 | 0 | -48 |
| > 6 ~ 10 | 58 | 0 | -58 |
| > 10 ~ 18 | 70 | 0 | -70 |
| > 18 ~ 30 | 84 | 0 | -84 |
| > 30 ~ 50 | 100 | 0 | -100 |
| > 50 ~ 80 | 120 | 0 | -120 |
| > 80 ~ 120 | 140 | 0 | -140 |
| > 120 ~ 180 | 160 | 0 | -160 |
| > 180 ~ 250 | 185 | 0 | -185 |
Ordinary shafts and holes, sleeves, bushings, pulleys, sliding bearings
Low-precision centering, no relative movement, torque transmission via keys/pins
Replacement for H9/h9 to reduce processing costs
5. Comparison between h10 and H10 (Key Differences)
| h10 (Shaft) | H10 (Hole) | |
| Fundamental Deviation | h (Upper Deviation = 0) | H (Lower Deviation = 0) |
| Deviation Direction | All below the nominal size | All above the nominal size |
| Limit Deviations | es = 0, ei = −IT10 | EI = 0, ES = +IT10 |
| Example of Fit | H10/h10 (Clearance Location Fit) | H10/h10 (Same as above) |
