ISO8062 is the most widely spread casting tolerance standard, CT5 to CT7 is the investment casting general casting tolerance.
Leesh Holdings foundry use ISO8062 as our most popular use casting tolerance standard:
CT5-CT7- Investment Casting– Silicon Sol Method
CT7- Investment Casting– Water Glass Method
CT8-CT9- Sand Casting – Machine Molding
Over CT9 – Sand Casting- Manual Molding
High Tolerance Control - Investment Casting Supplier
Call us +86 135 1608 5845 or email us at: info@leesh.cn
ISO Casting Dimensional Tolerance Standard ISO8062 (GB/T6414) CT5-CT7
| Nominal Dimension (mm) | CT4 | CT5 | CT6 | CT7 | CT8 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| > | ≤ | Tolerance | Bilateral Tolerance | Tolerance | Bilateral Tolerance | Tolerance | Bilateral Tolerance | Tolerance | Bilateral Tolerance | Tolerance | Bilateral Tolerance |
| — | 10 | 0.26 | ±0.13 | 0.36 | ±0.18 | 0.52 | ±0.26 | 0.74 | ±0.37 | 1 | ±0.5 |
| 10 | 16 | 0.28 | ±0.14 | 0.38 | ±0.19 | 0.54 | ±0.27 | 0.78 | ±0.39 | 1.1 | ±0.55 |
| 16 | 25 | 0.3 | ±0.15 | 0.42 | ±0.21 | 0.58 | ±0.29 | 0.82 | ±0.44 | 1.2 | ±0.6 |
| 25 | 40 | 0.32 | ±0.16 | 0.46 | ±0.23 | 0.64 | ±0.32 | 0.9 | ±0.45 | 1.3 | ±0.65 |
| 40 | 63 | 0.36 | ±0.18 | 0.5 | ±0.25 | 0.7 | ±0.35 | 1 | ±0.50 | 1.4 | ±0.70 |
| 63 | 100 | 0.4 | ±0.20 | 0.56 | ±0.28 | 0.78 | ±0.39 | 1.1 | ±0.55 | 1.6 | ±0.80 |
| 100 | 160 | 0.44 | ±0.22 | 0.62 | ±0.31 | 0.88 | ±0.44 | 1.2 | ±0.60 | 1.8 | ±0.90 |
| 160 | 250 | 0.5 | ±0.25 | 0.7 | ±0.35 | 1 | ±0.50 | 1.4 | ±0.70 | 2 | ±1.0 |
| 250 | 400 | 0.56 | ±0.28 | 0.78 | ±0.39 | 1.1 | ±0.55 | 1.6 | ±0.80 | 2.2 | ±1.1 |
| 400 | 630 | 0.64 | ±0.32 | 0.9 | ±0.45 | 1.2 | ±0.60 | 1.8 | ±0.90 | 2.6 | ±1.3 |
German Investment Casting Linear Dimensional Tolerance Standard VDG P690
| Nominal Dimension (mm) | Length, Width, Height (mm) | Centre Line Distances (mm) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| From | To | D1 | D2 | D3 | D1 | D2 | |||
| Tolerance | Tolerance Field | Tolerance | Tolerance Field | Tolerance | Tolerance Field | Tolerance | Tolerance Field | ||
| 0 | 6 | ±0.10 | 0.2 | ±0.08 | 0.16 | ±0.06 | 0.12 | ±0.25 | ±0.16 |
| 6 | 10 | ±0.12 | 0.24 | ±0.10 | 0.2 | - | - | - | - |
| 10 | 14 | ±0.15 | 0.3 | ±0.12 | 0.24 | ±0.09 | 0.18 | - | - |
| 14 | 18 | ±0.20 | 0.4 | ±0.14 | 0.28 | - | - | - | - |
| 18 | 24 | ±0.25 | 0.5 | ±0.17 | 0.34 | ±0.12 | 0.23 | ±0.32 | ±0.20 |
| 24 | 30 | ±0.30 | 0.6 | ±0.20 | 0.4 | ±0.14 | 0.27 | - | - |
| 30 | 40 | ±0.37 | 0.74 | ±0.25 | 0.5 | ±0.17 | 0.33 | ±0.50 | ±0.30 |
| 40 | 50 | ±0.44 | 0.88 | ±0.30 | 0.6 | ±0.20 | 0.39 | - | - |
| 50 | 65 | ±0.52 | 1.04 | ±0.38 | 0.76 | ±0.23 | 0.46 | ±0.71 | ±0.45 |
| 65 | 80 | ±0.60 | 1.2 | ±0.46 | 0.92 | ±0.27 | 0.53 | - | - |
| 80 | 100 | ±0.68 | 1.38 | ±0.53 | 1.06 | ±0.30 | 0.6 | ±0.90 | ±0.60 |
| 100 | 120 | ±0.76 | 1.52 | ±0.60 | 1.2 | ±0.33 | 0.66 | - | - |
| 120 | 140 | ±0.84 | 1.68 | ±0.65 | 1.3 | ±0.36 | 0.71 | ±1.15 | ±0.85 |
| 140 | 160 | ±0.92 | 1.84 | ±0.72 | 1.44 | ±0.38 | 0.76 | - | - |
| 160 | 180 | ±1.02 | 2.04 | ±0.80 | 1.6 | ±0.42 | 0.81 | - | - |
| 180 | 200 | ±1.12 | 2.24 | ±0.88 | 1.76 | ±0.43 | 0.86 | ±1.80 | ±1.00 |
| 200 | 225 | ±1.28 | 2.56 | ±0.95 | 1.9 | ±0.47 | 0.93 | - | - |
| 225 | 250 | ±1.44 | 2.88 | ±1.05 | 2.1 | ±0.51 | 1.02 | - | - |
| 250 | 280 | ±1.64 | 3.28 | ±1.15 | 2.3 | ±0.56 | 1.12 | ±2.20 | ±1.25 |
| 280 | 315 | ±1.84 | 3.68 | ±1.25 | 2.5 | ±0.63 | 1.26 | - | - |
| 315 | 355 | ±2.10 | 4.2 | ±1.40 | 2.6 | ±0.71 | 1.42 | ±2.60 | ±1.60 |
| 355 | 400 | ±2.40 | 4.8 | ±1.60 | 3.2 | ±0.80 | 1.6 | - | - |
Notes for VDG P690:
- D1: General dimension tolerances for general use
- D2: Applicable to important dimensions requiring tight tolerances
- D3: Premium tolerance – requires additional operations such as correction to achieve, applicable only to a few special dimensions with specific requirements
Additional Casting Tolerances
Casting Angular Tolerance: ± 0.5° ~ ± 1°
Casting Straightness: Error of 0.127mm per 25mm
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