Production – Our Production Engineers have the responsibility for casting production design and supervision. They work in cooperation with the Q.C. department to make sure each aspect of the specifications are met accurately, promptly and in a cost effective way.

Support Facilities are NADCAP Approved Special Processors:

  • Radiographic Inspection
  • Penetrant Inspection
  • Ultrasonic Testing
  • Magnetic Particle Inspection
  • Metallurgical Testing
  • Heat Treat

Which casting process is best? The volume of parts is not a critical factor in choosing the best casting process but the secondary manufacturing steps are. These secondary steps can add substantially to the cost of a manufactured part. Therefore using the casting process that reduces or eliminates the secondary processes is most critical. Investment Casti ng is the process that is most effective at reducing the requirement for secondary manufacturing steps, therefore lowering the cost of parts plus the following advantages:

  • Better design flexibility for parts with complex shapes
  • Weight Reduction
  • Close Tolerances
  • Better Surface Finish
  • Zero Draft
  • Minimum Mismatch
  • Casting Repeatability

If your part doesn’t require most of the advantages of the Investment Casting process shown above you should consider the less costly Sand Casting process.

Recommended Investment Casting Design Specifications
Surface Finish
C30
Linear Tolerances
Up to 1/2″ ± .005
Up to 4″ ± .010
Up to 6″ ± .015
Up to 7″ ± .017
Up to 8″ ± .019
Up to 9″ ± .020
Up to 10″ ± .025
Flatness & Straightness
Length                    Tolerance
Up to 1″ sq.            w/in .010
Up to 2″ sq.            w/in .015
Up to 4″ sq.            w/in .020
Up to 6″ sq.            w/in .030
Over 6″ sq.            ± .005 in/in
Concentricity
When a length of a tubular part does not exceed its component diameters by more than a factor of 2, the diameters will be concentric within .005 inch per inch of separation.
Angles
± .030° or ± .055 in/in, whichever is greater
Roundness
Length                      T/R – or Difference Between Diameters
1.  .050                    .010
2.  1.00                    .015
3.  1.50                    .020
4.  2.00                    .025
5.  Over 2.00            Linear tolerances apply
Draft
In general, the investment castings process does not require draft on any surface.
Serration or Knurls and Texture
Can be cast with sharp detail provided it can be designed into the tooling.
Holes
Hole length is a function of the diameter of the hole.  Typically 1/8″ dia. hole can be cast 1″ long; a 1/2″ hole can be cast 6″ long.  The length of blind holes can be cast 3 times their diameter.