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Valve Seat Cutting Machine Performance Valve Jobs

Perfect Concentricity and Perfect Finish.

The Rottler SG7MTS is a compact machine competitively priced but with big expensive machine features and accuracy. The SG7MTS Rottler  will handle Jaguar 6 cylinder heads and all automotive and light truck heads along with motorcycle, and recreation vehicle heads. Great chatter free finishes and perfect concentricity are guaranteed with the SG7MTS


Valve Seat Cutting Machine Perfect Concentricity and Seat Finish

Concentricity and perfect finishes.Simply the best fixed carbide pilot machine available. Nearly 2,800 pounds of casting along with Rottler heavy duty 3.150 spindle insures the best surface finishes and concentricity with ease of operation.Even an inexperienced shop hand can be trained to perform perfect valve seat cutting in no time flat.Rottler Rigid Precision Carbide Centering Pilots are manufactured to less than one tenth tolerance and combined with the Light Weight Air Float Work head gives perfect centering in the Valve Guide and the Best Concentricity of the Valve Seat to Guide.Multi Angle Seat Cutting,Harley Davidson, Formula One , Winston Cup, Japanese Motorcycle Cat 3412 and 3406E , Model A ford and many Vintage applications are simply no match for the SG series machines.
Rottler SG7MTS
Rottler SG8MTS
Rottler SG9MTS
Valve Seat Cutting Machine Perfect Concentricity and Seat Finish

Rottler’s new patent pending UNIPILOT TOOLING system allows the carbide centralizing UNIPILOT to work like a live pilot – stays in the spindle while moving from valve guide to guide – but at the same time has a fixed pilot design to give improved CONCEN. 

Fixed (dead) pilots have proven over the years to give more accurate CONCEN compared to live pilots mainly because live pilots have clearance between the pilot and the guide.

Rottler SG10XY
Valve Seat Cutting Machine Perfect Concentricity and Seat Finish

The Rottler SG10XY ACTIV spindle is mounted on a sphere which allows the UNIPILOT to automatically center with the valve guide centerline while the Workhead is floating on air cushions. Once air floating stops and the Workhead clamps, the UNIPILOT and valve guide centerline are maintained while cutting the valve seat.
 ACTIV SPINDLE - Spherical Pneumatic Automatic Alignment System built into the Spindle for fast location of the pilot into the Valve Guide and Accurate Centering (Patent Pending)
Air Float Work Head on Intermediate Base Plate
Heavy Duty Spindle - Diameter 3.150” (80mm) Hardened and Ground with 8” (200mm) of vertical travel.
Rottler Automatic Tightening and Quick Release Spindle Lock Nut System for One Hand Operation for fitting and removing tooling to and from the spindle – never comes loose!
Gives Best Concentricity
Rottler's Rigid Precision carbide centering UNIPILOTS are manufactured to less than one tenth (.002mm) tolerance.
Combined with the light weight air float Workhead the SG10XY gives perfect centering in the valve guide and the best concentricity of any machine on the market, 

​Valve Seat Cutting Machine Large Diesel Cylinder Heads 360 Roll over fixture rolls Cat 3406 E

The Rottler SG80 series were 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 Rottler's exclusive spindle design.


Rottler SG80MTS

​Valve Seat Cutting Machine Large Diesel Cylinder Heads Includes Natural Gas Cat Heads Locomotive.

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.

Rottler SG80A