• • Quality Products
  • • Value Added Services
  • • Manufacturing Excellence
(630) 920-8281

Gravity Casting Services

CM International manufactures gravity casted parts for a wide range of industries, including, but not limited to, automotive, hydraulic, railway, electronic, and commercial. Common parts we manufacture with the gravity casting process include engine housing, brackets, cooling systems and large utility equipment. Our part size capabilities range from 25mm to 750 mm (1” to 30”). We offer general tolerance per ISO 2768 /ASME Y14.5-2009 and are headquartered in Chicago with manufacturing facilities in China.


Also known as permanent mold casting, gravity casting begins with two sides of a steel mold that are made to fit together precisely, while also opening and closing easily. These steel molds are used over and over to create many metal parts. Prior to pouring the molten metal, the molds are coated with a refractory spray that allows the mold to retain its strength in high temperatures. The molds are then placed together and a feed or upriser is inserted. Molten metal is poured through the feed into the gravity casting tool. Once the metal part solidifies, the mold is opened and the casted part is removed. Once the feeds are removed, the part is cleaned and finished to the customer’s specifications.

Gravity Casting Metals

  • Aluminum
  • Zinc
  • Magnesium
  • Copper Alloys
  • Graphite Molds
  • Iron
  • Steel

Advantages of Gravity Casting

Gravity casting uses steel and graphite molds to create simple, yet durable metal components. One advantage of gravity casting over other casting processes is that the mold used to create the parts is permanent. These high-quality molds, most often made of steel, can be used over and over to produce the same part. This makes the product quality consistent and allows for faster production times. Gravity casted metal parts also offer good dimensional accuracy and tend to have smoother surfaces than sand casting parts.

What is the Difference Between Gravity Casting and Die Casting?

Gravity casting a simpler process than die casting. During gravity casting, molten metal is poured into a mold and there is no force or pressure applied. Die casting requires high pressure to force the molten metal into the mold. In addition, gravity casting is typically used to produce simpler shapes and designs, which die casting is used to create more complex parts.

Gravity Casting Photo Gallery

Click photo to expand.

metal casting manufacturer metal casting manufacturing chicago metal casting services