Knowledge database

You can find information on tolerances, surfaces, machining allowances and the design of radii and lift-out chamfers on the component in our design guidelines

Printed casting is our sand casting process for fast production. We achieve surface roughnesses of Ra 50 to 100 for all materials.

Assignment table GTB to DCTG

GTB15 GTB16 GTB17 GTB18 GTB19 GTB20
DCTG8 DCTG8 DCTG9 DCTG10 DCT12 DCTG13

Construction guideline iron casting - Printed Casting

Status: 28.01.2025

Radii on the raw casting

Use the largest possible radius (marked as 1st choice)

Use next smaller alternative if 1st choice leads to feasibility problems.

Longest axis on the component Outer radii Inner radii
< 200 mm 3 mm 1st choice: 8 mm
Alternative: 5 mm
> 200 mm 1st choice: 5 mm 1st choice: 15 mm
1st alternative: 10 mm
Alternative: 4 mm 2nd alternative: 8 mm
Measurement on machined surfaces: Tolerance DCTG 11 and machining allowance RMAG-G

Please color measurement areas BLUE.

Longest axis on component [mm] Allowance on each surface (DCTG 11 + RMAG-G) [mm] Additional BAZ** [mm]
60 4 1
100 4 1
160 5 1
250 6 2
400 7 3
630 8 3
1000 9 4
1600 9 4
2500 11 4
4000 12 4
6000 14 4



Gaps <15mm between two processing surfaces should be closed.



Holes < 30mm should be sealed.









Thanks to sand pressure, there is no need for bevels.







The allowance on the casting after casting may be lower due to shrinkage within 1/4 of the DCTG level.

* The longest axis on the component specifies the allowance for all machining surfaces.

** from DIN EN ISO 8062-3:2008-09 point 8.1: In sand casting, top surfaces may require larger machining allowances (additional machining allowance) . The additional machining allowance is based on ISO 1685-1. We will inform you about the additional machining allowance after the order has been placed and the casting position has been successfully determined.

Construction guideline iron casting - ClearCast (STILL UNDER CONSTRUCTION)

Design guideline aluminum casting - Printed Casting

Status: 28.01.2025

Radii on the raw casting

Use the largest possible radius (marked as 1st choice)

Use next smaller alternative if 1st choice leads to feasibility problems.

Longest axis on the component Outer radii Inner radii
< 200 mm 1 mm 1st choice: 3 mm
Alternative: 2 mm
> 200 mm 1st choice: 3 mm 1st choice: 5 mm
1st alternative: 4 mm
Alternative: 2 mm 2nd alternative: 3 mm
Measurement on machined surfaces: Tolerance DCTG 10 and machining allowance RMAG-F

Please color measurement areas BLUE.

Longest axis on component [mm] Allowance on each surface (DCTG 10 + RMAG-F) [mm] Additional BAZ** [mm]
60 2 1
100 3 1
160 3 1
250 3 2
400 4 3
630 6 3
1000 7 4
1600 7 4
2500 7 4
4000 8 4
6000 8 4



Gaps <15mm between two processing surfaces should be closed.



Holes < 30mm should be sealed.









Thanks to sand pressure, there is no need for bevels.







The allowance on the casting after casting may be lower due to shrinkage within 1/4 of the DCTG level.

* The longest axis on the component specifies the allowance for all machining surfaces.

** from DIN EN ISO 8062-3:2008-09 point 8.1: In sand casting, top surfaces may require larger machining allowances (additional machining allowance) . The additional machining allowance is based on ISO 1685-1. We will inform you about the additional machining allowance after the order has been placed and the casting position has been successfully determined.

Design guideline for cast steel - Printed Casting

Status: 28.01.2025

Radii on the raw casting

Use the largest possible radius (marked as 1st choice)

Use next smaller alternative if 1st choice leads to feasibility problems.

Longest axis on the component Outer radii Inner radii
< 200 mm 3 mm 1st choice: 8 mm
Alternative: 5 mm
> 200 mm 1st choice: 5 mm 1st choice: 15 mm
1st alternative: 10 mm
Alternative: 4 mm 2nd alternative: 8 mm
Measurement on machined surfaces: Tolerance DCTG 11 and machining allowance RMAG-G

Please color measurement areas BLUE.

Longest axis on component [mm] Allowance on each surface (DCTG 11 + RMAG-G) [mm] Additional BAZ** [mm]
60 4 1
100 4 1
160 5 1
250 6 2
400 7 3
630 8 3
1000 9 4
1600 9 4
2500 11 4
4000 12 4
6000 14 4



Gaps <15mm between two processing surfaces should be closed.



Holes < 30mm should be sealed.









Thanks to sand pressure, there is no need for bevels.







The allowance on the casting after casting may be lower due to shrinkage within 1/4 of the DCTG level.

* The longest axis on the component specifies the allowance for all machining surfaces.

** from DIN EN ISO 8062-3:2008-09 point 8.1: In sand casting, top surfaces may require larger machining allowances (additional machining allowance) . The additional machining allowance is based on ISO 1685-1. We will inform you about the additional machining allowance after the order has been placed and the casting position has been successfully determined.