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Sand Castings

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

  • RADIOGRAPHIC INSPECTION
  • ULTRASONIC TESTING
  • MAGNETIC PARTICLE INSPECTION
  • PENETRANT INSPECTION
  • METALLURGICAL TESTING
  • HEAT TREATING
  • DIE MAKING
  • PATTERN MAKING
  • LIGHT MACHINING

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 SAND CASTING DESIGN SPECIFICATIONS

Surface Finish
C-50 Aluminum Casting
C-90 Steel Casting
 
Linear
± .030" for 12" and
± .003 per inch thereafter
(Aluminum)
 
± .060 for 12" and
± .006 per in. thereafter
(Steel)
 
Flatness & Straightness
Up to 6" w/in .030
Up to 12" w/in .060
Over 12" ±.010 in/in
 
Concentricity
When a lenght of a tubular part does not exceed its component diameter by more than a factor of 2, the diameters will be concentric within .015 inch per inch of Spearation (un-correctness).
 
Roundness
Variation from a true cicrle will not exceed the linear tolerance limit on a diameter or radius
 
Angles
± 2°
 
Draft
1° to 2° draft required