Contact us : precimetal.cast@gmail.com Call us : +91-79-26400374

 
 
    
    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.
 
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