Heavy Duty Cylinder Head Valve Seat and Guide Machine SG80A



The Rottler SG80A was created specifically for machine shops that rebuild small to large cylinder heads found in the heavy duty engine industry. Large cylinder heads come in many shapes and sizes, from 24 valve single casting cylinder heads to huge single cylinder heads used in natural gas, mining and marine workboat engines. We put our trusted engine block machining technology to work designing a heavy duty machine that handles many operations required on a wide variety of cylinder heads. 

At Rottler we believed that many large cylinder heads could be "plunge cut" with fixed tooling to save time and money. We realized that plunge cutting would require a very rigid machine utilizing many of our already established design features such as Rottlers exclusive spindle design.

Over the decades, Rottlers spindle design has proven that our engine block machines are able to "plunge cut" wide counterbores found in large engine blocks with exceptional results. We used this spindle design for the SG80A and it has since been proven, in over 50 machines, that the SG80A is capable of plunge cutting large valve seats very quickly and with excellent CONCEN and surface finish.

Control Automatic CNC
Spindle - Diameter 3.75"
Valve Seat Diameter Range0.550"-8.25"
Cylinder Head Dimensions (with 360 degree rollover fixture)49L x 14W x 10H"
Control Automatic CNC
Spindle - Diameter 3.75"
Valve Seat Diameter Range0.550"-8.25"
Cylinder Head Dimensions (with 360 degree rollover fixture)49L x 14W x 10H"
  • Diesel Rebuilder
  • Heavy Duty
  • Large Engine
  • Locomotive Engine
  • Oil & Gas
  • Remanufacturing