There are two main reasons why manganese is the primary choice for wear steel in crusher parts:

1) Manganese steel has the unique ability to work harden as it’s impacted by the mineral crushing process. In addition, the machined surfaces on a crusher casting also work harden as they’re machined. That’s why the machining of manganese steel is avoided by many shops and is considered a specialty process. A new “as cast” crushing surface on a part will begin at near 250 Brinell hardness, and when worn out the same surface may have a hardness value of 350 to 400. I’ve seen returned castings with as high as a 500 hardness value. This would have been accomplished by crushing a very high compressive strength material.

2) Perhaps more importantly, manganese steel is the only steel that will develop this skin hardness and still remain ductile enough below the work-hardened surface to resist breakage. Manganese steel is a very durable material.

We do have pattern equipment to supply a movable jaw die for a 15 x 36 Gruendler jaw crusher.

The jaw die we have the ability to provide features a round tooth form with a 3.000-inch tooth pitch and a 1.000-inch tooth depth. The tooth root lies on the vertical centerline of the part with a full curved jaw side profile. This jaw die is 41.500 inches long and is 36.000 inches wide.

Please check these dimensional values against your existing part and if they match, you can request price and delivery information from our Customer Service Department (1-800-547-9471) for Columbia Part Number 128390.