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Dimensional Parameter

Dimensional Parameter

The accuracy obtainable in precision casting depends on a number of process parametes, of which the die tolerances, the shrinkage of wax, the refractory and casting material ust be mentined in paticular. The table given below shows the tolerance achievable for different dimensions.

 

Linear Tolerances

Dimensions(mm) Tolerance(mm)
upto 13 +/- 0.10
13-25 +/- 0.15

For every additional 25mm add +/- 0.15

Roundness

Outside(mm) Tolerance(mm)
up to 13 +/- 0.15
13-25 +/- 0.25
25-30 +/- 0.45

For every additional 25mm add +/- 0.25

Flatness

Length(mm) As Cast
up to 15 +/- 0.10
25-50 +/- 0.18
50-75 +/- 0.25

For every additional 25mm add +/- 0.15

Parallelism

Gap(mm) Tolerance(mm)
Up to 13 +/- 0.10
13-25 +/- 0.15
25-30 +/- 0.45

For every additional 25mm add +/- 0.1

Concentricity

Outside(mm) Inside(mm) eccentricity as Cast
19 06 +/- 0.10
38 19 +/- 0.20
50 25 +/- 0.25

For every additional 25mm add +/- 0.25