DCT: Dimensional casting tolerance
DCTG: Dimensional casting tolerance grade ( The total range, divide by 2 to get the individual ± tolerance)- total band (upper limit – lower limit)
Dimensional casting tolerance grades for long-series production raw castings
| Method | Dimensional casting tolerance grade (DCTG) for casting material | |||
| Steel | Grey cast iron | SG cast iron | Malleable cast iron | |
| Sand cast, hand moulding | 11 to 14 | 11 to 14 | 11 to 14 | 11 to 14 |
| Sand cast, machine moulding and shell moulding | 8 to 12 | 8 to 12 | 8 to 12 | 8 to 12 |
Dimensional casting tolerance grades for short-series or single-production raw castings
| Method | Moulding material | Dimensional casting tolerance grade (DCTG) for casting material | |||
| Steel | Grey cast iron | SG cast iron | Malleable cast iron | ||
| Sand cast, hand moulding | Clay-bonded | 13 to 15 | 13 to 15 | 13 to 15 | 13 to 15 |
| Chemically bonded | 12 to 14 | 11 to 14 | 11t o 14 | 11 to 14 | |
Linear dimensional sand casting tolerances (DCT)a
| Nominal dimensions related to the moulded part | DCT8 | DCT9 | DCT10 | DCT11 | DCT12 | DCT13 | DCT14 | DCT15 | DCT15wtb | |
| – | ≤ 10 | ±0.5 | ±0.75 | ±1 | ±1.4 | ±2.1 | – | – | – | – |
| > 10 | ≤ 16 | ±0.55 | ±0.8 | ±1.1 | ±1.5 | ±2.2 | – | – | – | – |
| > 16 | ≤ 25 | ±0.6 | ±0.85 | ±1.2 | ±1.6 | ±2.3 | ±3 | ±4 | ±5 | ±6 |
| > 25 | ≤ 40 | ±0.65 | ±0.9 | ±1.3 | ±1.8 | ±2.5 | ±3.5 | ±4.5 | ±5.5 | ±7 |
| > 40 | ≤ 63 | ±0.7 | ±1 | ±1.4 | ±2 | ±2.8 | ±4 | ±5 | ±6 | ±8 |
| > 63 | ≤ 100 | ±0.8 | ±1.1 | ±1.6 | ±2.2 | ±3 | ±4.5 | ±5.5 | ±7 | ±9 |
| >100 | ≤ 160 | ±0.9 | ±1.25 | ±1.8 | ±2.5 | ±3.5 | ±5 | ±6 | ±8 | ±10 |
| >160 | ≤ 250 | ±1 | ±1.4 | ±2 | ±2.8 | ±4 | ±5.5 | ±7 | ±9 | ±11 |
| >250 | ≤ 400 | ±1.1 | ±1.6 | ±2.2 | ±3.1 | ±4.5 | ±6 | ±8 | ±10 | ±12.5 |
| >400 | ≤ 630 | ±1.3 | ±1.8 | ±2.5 | ±3.5 | ±5 | ±7 | ±9 | ±11 | ±14 |
| >630 | ≤1000 | ±1.4 | ±2 | ±3 | ±4 | ±6 | ±8 | ±10 | ±13 | ±16 |
| >1000 | ≤ 600 | ±1.6 | ±2.3 | ±4 | ±5 | ±7 | ±9 | ±12 | ±15 | ±19 |
| > 1600 | ≤2500 | ±1.9 | ±2.7 | ±4 | ±5 | ±8 | ±11 | ±13 | ±17 | ±21 |
| >2500 | ≤4000 | ±2.2 | ±3.1 | ±5 | ±6 | ±9 | ±12 | ±15 | ±19 | ±25 |
| >4000 | ≤6300 | – | ±3.5 | ±5 | ±7 | ±10 | ±14 | ±18 | ±22 | ±28 |
| >6300 | ≤10000 | – | – | ±6 | ±8 | ±12 | ±16 | ±20 | ±25 | ±32 |
a For wall thicknesses in grade DCTG 1 to DCTG 15, one grade coarser applies
b Grade DCTG 15wt (wall thickness) exists only for wall thicknesses of castings generally specified to DCTG 15.
Linear dimensional tolerance for dimensional casting tolerance grade (DCTG)a
| Nominal dimensions related to the moulded part | DCTG8 | DCTG9 | DCTG10 | DCTG11 | DCTG12 | DCTG13 | DCTG14 | DCTG15 | DCTG 15wtb | |
| – | ≤ 10 | 1 | 1.5 | 2 | 2.8 | 4.2 | – | – | – | – |
| > 10 | ≤ 16 | 1.1 | 1.6 | 2.2 | 3 | 4.4 | – | – | – | – |
| > 16 | ≤ 25 | 1.2 | 1.7 | 2.4 | 3.2 | 4.6 | 6 | 8 | 10 | 12 |
| > 25 | ≤ 40 | 1.3 | 1.8 | 2.6 | 3.6 | 5 | 7 | 9 | 11 | 14 |
| > 40 | ≤ 63 | 1.4 | 2 | 2.8 | 4 | 5.6 | 8 | 10 | 12 | 16 |
| > 63 | ≤ 100 | 1.6 | 2.2 | 3.2 | 4.4 | 6 | 9 | 11 | 14 | 18 |
| > 100 | ≤ 160 | 1.8 | 2.5 | 3.6 | 5 | 7 | 10 | 12 | 16 | 20 |
| > 160 | ≤ 250 | 2 | 2.8 | 4 | 5.6 | 8 | 11 | 14 | 18 | 22 |
| >250 | ≤ 400 | 2.2 | 3.2 | 4.4 | 6.2 | 9 | 12 | 16 | 20 | 25 |
| >400 | ≤ 630 | 2.6 | 3.6 | 5 | 7 | 10 | 14 | 18 | 22 | 28 |
| >630 | ≤1000 | 2.8 | 4 | 6 | 8 | 11 | 16 | 20 | 25 | 32 |
| >1000 | ≤1600 | 3.2 | 4.6 | 7 | 9 | 13 | 18 | 23 | 29 | 37 |
| > 1600 | ≤2500 | 3.8 | 5.4 | 8 | 10 | 15 | 21 | 26 | 33 | 42 |
| >2500 | ≤4000 | 4.4 | 6.2 | 9 | 12 | 17 | 24 | 30 | 38 | 49 |
| >4000 | ≤6300 | – | 7 | 10 | 14 | 20 | 28 | 35 | 44 | 56 |
| >6300 | ≤10000 | – | – | 11 | 16 | 23 | 32 | 40 | 50 | 64 |
a For wall thicknesses in grade DCTG 1 to DCTG 15, one grade coarser applies
b Grade DCTG 15wt (wall thickness) exists only for wall thicknesses of castings generally specified to DCTG 15.
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