Precimetal Cast Pvt. Ltd. stands to develop and supply all types of complicated part requirements. We have successfully supplied precision investment castings by “Lost-wax” process for a broad spectrum of commercial, industrial and aerospace applications since its incorporation. Our specialists are experts in manufacturing any given high complicated castings with the best possible tolerances.
An expansive technological knowledge in the process “Lost-wax” is placing us at the top in producing quality castings.
We have had good fortune to produce the smallest castings from few grams to the largest casting 35,000 grams. Still, we can manufacture the castings up to 50,000 grams at our present foundry.
Our Mission is to develop and supply precision investment castings by “Lost-wax” process as per our valued customers’ specific drawing, specified standard and quality within the stipulated time period.
Design Consideration
For any product development, the design part is always important from the point of manufacturing process and the same is in the case of investment castings. We can suggest to manufacture the job with slight changes in the conventional designs which in fact will not impair its functions. This will also ensure the maximum soundness of the castings, eliminating any shrinkage, porosities or cavities in the castings.
Moreover, the castings will be manufactured with a better yield and with a lesser rejection, which in fact will help the buyer to get the product at a more economical price.
Dimension Tolerances
Investment castings can be produced with a very close control dimensions eliminating machining in some of the products. It’s to the buyer’s interest to develop the product with minimum machining allowance to enable the buyer to take the advantage of the process.
General tolerances which can be achieved by this process are mentioned below. However if require still further tight tolerance, the same can be discussed with the manufacturer and then can be designed the product accordingly.
Dimensions
The dimensions tolerances mentioned are as per Indian Standards 11166 Class II. All tolerances are in tolerances.
Nominal dimension
Overall Dimensions
Over
-
6
10
18
30
80
180
300
Over
Upto
6
10
18
30
80
180
300
500
-
6
0.10
0.12
0.15
0.20
0.25
0.25
0.30
0.35
6
10
-
0.12
0.15
0.25
0.25
0.30
0.35
0.45
10
18
-
-
0.20
0.30
0.35
0.35
0.40
0.55
18
30
-
-
0.30
0.40
0.45
0.50
0.65
30
80
-
-
-
-
0.45
0.55
0.60
0.75
80
180
-
-
-
-
-
0.60
0.70
0.90
180
300
-
-
-
-
-
-
1.00
1.15
300
500
-
-
-
-
-
-
-
2.00
Flatness
Casting length (mm)
25
50
75
100
125
150
As-cast tolerances (mm)
0.20
0.37
0.50
0.63
0.76
0.76
Straightness
Casting length (mm)
50
75
100
125
150
As-cast tolerances (mm)
0.50
0.75
0.75
1.00
1.50
Concentricity
Outside diameter
(mm)
18.75
25.00
37.50
50.00
Inside diameter (mm)
6.25
12.50
18.45
25.00
As-cast tolerances (mm)
0.100
0.125
0.200
0.250
Radius
The
general tolerance obtainable for all small radii is ±
0.015 inch on larger radii, a general tolerance of ±
0.015 inch for each 2 inch. of radius proportionately.
This applies to both internal and external
radii.
Angles
As a general rule, angular tolerances
can be held to ± ½ degree.
Surface
Finish
Material
Average R.M.S. value
Carbon and low alloy steels
90-125
Stainless Steels
90-125
Moreover, letters, symbols, numbers, holes
etc. also can be casted in as
cast conditions by this
process.
