The lost wax model of casting is characterized by precise dimensioning. we can provide you with professional recommendations concerning feasible tolerances. extremely precise tolerances make a design needlessly expensive. To prevent this, we are glad to determine the best dimensioning together with our customers. The final result? Optimal use of our casting process.
| General Linear Tolerances |
| Dimension (in) |
Tolerance (in) |
Dimension (mm) |
Tolerance (mm) |
Up to 0.5
Up to 1.0
Over 1.0 |
± 0.003
± 0.005
± 0.007
per inch |
Up to 13
Up to 25
Over 25 |
± 0.10
± 0.13
± 0.13
per 25mm |
|
|
| Straightness |
| Length (in) |
As-Cast (in) |
Corrected (in) |
Length (mm) |
As-Cast (mm) |
Corrected (mm) |
2
2-4
4-6
6-8 |
± 0.020
± 0.030
± 0.040
± 0.060 |
± 0.010
± 0.015
± 0.020
± 0.025 |
50
50-100
100-150
150-200 |
± 0.50
± 0.75
±1.00
± 1.50 |
± 0.25
± 0.35
±0.50
± 0.65 |
|
|
| Flatness |
| Length (in) |
As-Cast (in) |
Corrected (in) |
Length (mm) |
As-Cast (mm) |
Corrected (mm) |
1
2
3
4 |
0.008
0.015
0.020
0.025 |
0.004
0.006
0.008
0.010 |
25
50
75
100 |
0.20
0.35
0.50
0.65 |
0.10
0.15
0.20
0.25 |
|
|
| Roundness |
| Outside Diameter (in) |
Tolerance (in) |
Inside Diameter (in) |
Tolerance (in) |
Outside Diameter (mm) |
Tolerance (mm) |
Inside Diameter (mm) |
Tolerance
(mm) |
0.5
1.0
1.5
2.0 |
± 0.010
± 0.020
± 0.025
± 0.030 |
Up to 0.25
0.25-0.50
0.50-1.0
Above 1.0 |
± 0.012
± 0.016
± 0.020
± 0.020
per inch |
12.5
25.0
37.5
50 |
± 0.25
± 0.50
± 0.60
± 0.75 |
Up to 6.25
6.25-12.5
12.5-25.0
Above 25.0 |
± 0.30
± 0.40
± 0.50
± 0.50
per 25mm |
|
|
| Concentricity |
Outside Diameter
(in) |
Tolerance
(in) |
Eccentricity
As-Cast (in) |
Corrected
(in) |
Outside Diameter
(mm) |
Tolerance
(mm) |
Eccentricity
As-Cast (mm) |
Corrected
(mm) |
0.75
1.00
1.50
2.00 |
0.25
0.50
0.75
1.00 |
± 0.004
± 0.005
± 0.008
± 0.010 |
± 0.004
± 0.005
± 0.005
± 0.008 |
18.75
25.00
37.50
50.00 |
6.25
12.50
18.75
25.00 |
± 0.10
± 0.13
± 0.20
± 0.25 |
± 0.10
± 0.13
± 0.13
± 0.20 |
|
|
| Surface Finish |
| Metal |
CLA Values |
| Micro-Inches |
Micro-Meters |
| As-Cast |
Machined |
As-Cast |
Machined |
Aluminum
Copper Alloys
Carbon Steels
Stainless Steels |
80-100
60-100
90-125
90-135 |
40-100
40-100
60-125
60-125 |
2.0-2.5
1.5-2.5
2.3-3.2
2.3-3.3 |
1.0-2.5
1.0-2.5
1.5-3.2
1.5-3.2 |
|
|
| |
| Other Features |
Angles: |
Angular Tolerances to ±½° |
|
Radii: |
Internal & External normally ± 0.015 in, ± 0.44 mm |
|
|
| Note : All the above tolerances are a general guide and may vary due to casting design and alloy selected. Certain dimensions may be held to closer Tolerances if required after design evaluation by us. |
|
