Home > Design Advice > The Choice of Process > Casting Tolerances > Linear Tolerances Affected by Movements
These tolerances must be provided in addition to the linear dimensional tolerances where a core or moving die part affects a dimension.
|
Projected Area of Casting |
Pressure Die Cast |
|||
|
|
Aluminium Alloy |
Zinc Alloy |
||
|
Up to 60 cm2 |
± 0.125mm |
± 0.1mm |
||
|
60 to 120 cm2 |
± 0.2mm |
± 0.15mm |
||
|
120 to 300 cm2 |
± 0.3mm |
± 0.2mm |
||
|
300 to 600 cm2 |
± 0.375mm |
± 0.3mm |
||
|
Projected Area of Casting |
Gravity Die Cast |
Sand Casting |
||
|
|
Aluminium or Zinc Alloy with Metal Core |
Aluminium or Zinc Alloy with Sand Core |
Aluminium Zinc or Copper Alloys |
|
|
Up to 60 cm2 |
± 0.25mm |
± 0.375mm |
± 0.5mm |
|
|
60 to 300 cm2 |
± 0.375mm |
± 0.625mm |
± 0.875mm |
|
|
300 to 600 cm2 |
± 0.375mm |
± 0.75mm |
± 1.125mm |
|
|
600 to 1500 cm2 |
± 0.55mm |
± 1.0mm |
± 1.5mm |
|
|
1500 to 3000 cm2 |
± 0.8mm |
± 1.5mm |
± 2.25mm |
|
The values shown represent production practice at the most economical level. Greater accuracy involving extra work or care in production should be specified only when and where necessary.
Notes for Designers of Non-Ferrous Castings
DOWNLOAD NOW Guides
HOW can MRT Castings help you?
I want...
- Select what you need
- a complete solution
- to develop a new component from initial concept
- advice on what processes are best suited to my component
- prototypes before committing to production tooling
- to re-shore production to the UK from overseas
- a new supplier to use existing tooling
- to convert a machined from solid part to a casting
- a supplier who can meet stringent quality requirements
New at MRT Blogs
Digital Transformation at MRT Castings
16th Apr 2026
At MRT, we’ve always prioritised the adoption and application of new technology.
Read More
A sincere thank you to everyone who visited MRT’s stand at Southern Manufacturing & Electronics 2026 at Farnborough International in February.
Read MoreLooking Ahead to 2026 at MRT Castings
19th Jan 2026
As we begin the new year, it’s a great opportunity to reflect on the progress made at MRT over the past 12 months.
Read More