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Solid Carbide Port
Cutting Tools for Engine
Building Applications..

SFS Carbide Tool makes a variety of Port Cutting Tools for automotive, airplane, and  performance engine building industries.

 Using SFS Carbide Tools the most demanding CNC machining shops get the job done with our solid Carbide Port cutting tools. Our mission is to help our tooling customers blue-print engine parts that will accomplish their goals and power expectations using modern CNC and CAM systems. We help customers, who are building engines for Airplane, racing motorcycles, to Nascar and NHRA Drag engines.

We provide custom tooling for automotive machine shops and Engine Builders working on Cylinder Heads, Crankshafts, Connecting Rods, Blocks, Balancing & Blueprinting, and Race Engine Porting.

Port Cutting Tools for the motorsport industry are yet another type of precision, solid carbide specialty tool manufactured by SFS IN SAGINAW, MI. Porting a car engine's cylinder head refers to fine-tuning the shapes of the ports that direct airflow to and from the cylinders. To improve its process for porting, a manufacturer of high-performance heads for racing engines will use a multitasking machine that is capable of milling and turning under CNC control.

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Click to enlarge images port cutting tool photos

Port cutting shank diameters vary from 1/4" to 1" with overall lengths to 3 1/2 inches long and neck diameters 1/8th inch to 1" depending on customers needs. Taper lengths behind the Carbide ball cutter head can be up to 10" long. Helix angle from straight to 60 degrees with the number of cutting flutes based upon customer specs. True balls can be made to specific diameters within .0005 and concentricity from head to shank within tenths....

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SFS manufacturers Carbide tools in our Saginaw, Michigan manufacturing shop. For increasing performance, our made to order Port Cutting Tools are used to port and finish aluminum and cast iron cylinder heads and manifolds. The most popular porting tools are manufactured on 1/2" and 3/4" OD shanks. Other solid carbide shank diameters are also available, as well as variable lengths depending on the porting job. ALL OF OUR CUTTERS ARE SOLID  MICROGRAIN CARBIDE. Each tool is custom MADE TO ORDER from our inventory of centerless ground, carbide blanks, to a specified HEAD DIAMETER, OVER ALL LENGTH  (OAL). AND TAPER BEHIND HEAD TO O.D. (OUTER DIAMETER)

 ALUMINUM PORTING - SFS porting tools are currently performing well in 5-axis CNC aluminum cylinder head applications, including high speed and feed situations.  We believe we have improved  the cutting tool geometry to match the productivity of the newest CNC machine tools. SFS has developed a unique FLUTE GEOMETRY, which can be applied to any number of flutes you require, although we  recommend an ODD NUMBER OF FLUTES WHEN CUTTING ALUMINUM.

To reduce chatter, SFS also offers a cutter with CHIPBREAKING GROOVES for increased perfrmance - WITHOUT SACRIFICING FINISH (Chipbreaker groves do not overlap ) . CHIPBREAKERS can allow increased cutting speeds and feeds. See some sample SFS fluted port cutters below.

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Sample fluted cutting tools for Aluminum porting jobs

Our Carbide Porting tools are “unique” because we are able to produce a tool that is concentric within .0002 from shank to head. Our burrs are guaranteed to be concentric from” heal to toe” and we make long shank tools, with shanks to 12”, for extended reach into deep cavities. Send us a tool sketch, and/or sample part, and our engineering prototype department will go to work to show you the SFS difference.

Speciality engine boring and CNC machining tools from SFS

CAST IRON - Cast iron when being machined produces both chips and powder residue. SFS has spent many R&D hours to develop unique fluting geometry which combines both the advantages of a bur and an end mill in cast iron porting applications. This new geometry evacuates both chips and resedue powder faster; which translates into INCREASED PERFORMANCE, LONGER TOOL LIFE, and REDUCED MACHINING TIME.

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Click to enlarge images or See the video..click here...

ALL SFS CARBIDE TOOL COMPANY CUTTERS are made from solid micro-grain precision ground carbide blanks.  In some cases it maybe more economical in having a 2 piece construction (CARBIDE SHANK BRAZED TO A CARBIDE HEAD) I.E. when the carbide cutting head is larger then the shank OD . Concentricity between the head and shank is held within a tolerance of .0002 T.I.R..

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Click to enlarge images on engine block machining


 SFS has developed a procedure to replace the cutting head on your worn-out porting tools thus making them like "NEW". We specialize in refurbishing carbide porting tools to existing specifications without compromise. This tool head replacement can be done several times to stretch your manufacturing budget. WHY BUY A NEW CUTTER WHEN YOU CAN REFURBISH A SCRAP CUTTER AND SAVE 40%? PLEASE NOTE we can not refurbish a cutting tool that has extended long flats on the shank. 

solid carbide 2 flute port boring tool

Using the same remanufacturing methods, it may be more economical in having a 2- piece construction (CARBIDE HEAD BRAZED TO A CARBIDE SHANK), I.E. when the cutter head is larger than the shank CONCENTRICITY BETWEEN HEAD AND SHANK IS HELD WITHIN .0002 T.I.R..

Below is a diagram to custom manufacture a tool to meet your requirements for both a roughing and finishing porting tool. All SFS staff needs to give you a custom quote on a Carbide Port Cutting Tool is the dimensions shown in the image below....

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Fill in the below form for Port Cutting Tool Quote or Order

A-Shank Diameter B- Over-all Length

C-Head Diameter    D-Neck Diameter

E- Neck Length  F- Taper length


City: State: Zip:

Phone #:   E-mail:

 Special instructions for part quote:

Hit the submit button once...

SFS "Made to order" carbide tools require either blue print drawings,detailed sketches, or can be prototyped from submitted samples.

Perfection... You demand it. And at SFS, we work to guarantee it. Both in our products and our services.  To us, the perfect port cutting tool is one that will not let you down. A cutting and finishing tool that maintains its strength and accuracy even in industry's harshest environments.  To keep our solid carbide cutting tools up to the task, we craft them from only the finest micro-grain carbide blanks available. A difference you will appreciate every time you put us to work to create just the right tool for your production line and job shop.

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Visting the Millport site to see their lines of CNC machining systems
Red RHINO 5 AXIS CNC Cylinder Digitizing and Porting Machine.

Port and engine block CNC cutting toolsComplete turn-key CNC Cylinder head porting package. The powerful yet easy to use the CENTROID M400 CNC control will digitize your hand shaped Intake, Exhaust and combustion chambers in 5 axes. Easy export to Mastercam X via the ethernet LAN or USB port to create the toolpaths. Inverse time toolpaths are generated for the smoothest fastest cut possible. Very little hand work is necessary after the machine has ported the head. Click to see CNC machining engine building applications

CNC Tools for Engine Builders matches just the right SFS Carbide Tipped tool for the job. A new casting is placed on the machine, the operator sets the Zero point, loads the cutting tool and the control machines the exact shape that was copied from the original hand shaped port. Rough and finish passes are automatically created. CNC Intake, Exhaust and Combustion Chambers are all created in this way.

In addition to porting heads this machine is also a fully featured 5 axis cnc machine that can be used for a multitude of other engine related machining tasks such as: Cylinder head O-ring grooves, piston work, intake manifold work, and anything requiring drilling, tapping, pocketing, contouring, grooving, boring, facing, Engraving and more! .... See the video..click here...

  • 5 axis AC servo CNC machining center
  • CENTROID M400 CNC control
  • TRT-25-100 CNC Tilt table
  • DP-4 Digitizing Probe package
  • TT-1 Auto Tool Set
  • Mastercam X (5 axis CAD/CAM software)
  • Cylinder head fixture plate
  • Special Tooling just for CNC Porting
  • Comprehensive CNC cylinder head porting training

The process of porting is more of an art than a science. An initial prototype is created by hand, tested for optimum airflow and power, then refined by hand machining until the desired performance is achieved. For a prototype cylinder head one exhaust port, one intake port and one chamber are developed. Once the design is complete, the part is digitized and computerized surfaces are generated. To create all of the ports required for a cylinder head, the port surfaces are duplicated and positioned in the correct locations. Then the CNC toolpath is generated to cut the part. CAM/CNC machining the ports in this manner is faster and produces a better quality product. Ports can be cut in less than one tenth the time it takes to cut them by hand and the ports are consistently the same. Once a design is complete any number of heads or manifolds can be produced that are exactly alike, if your machining tools hold to consistent tolerances.

SFS Carbide Tools are used in some of these Centroid Inc videos

CENTROID CNC Short Subject Videos. Short clips of specific CNC machining applications from milling, fixed table boring to threading and 3D mold making. Click the above link to select a variety of precision machining tools in action.

CNC cylinder head porting, 5 axis CNC tilting rotary table. New! 5 Axis Tilting Rotary Table, CNC Cylinder Head Porting.
See our new TRT-25100 Tilting rotary table in action. See how to digitize a hand ported cylinder head and CNC port the bare casting perfectly matching the original hand porting. This new CENTROID system is the best way to reproduce winning Cylinder head designs with speed, efficiency and most important repeatability!
click here to see this video...

SFS Carbide Tool Company Inc

Our employees desire to meet and exceed the quality and accuracy demanded of your precision cutting tool specs during the entire production life cycle. We in turn go out of our way to earn your repeat business on future projects.  We encourage you to get a quick quote from us on stock purchases, or custom tool making jobs. Give us a call at 1-989-777-3890 for custom quotes, or talk to our engineering department on your job requirements.

SFS Carbide is ready to meet your exact application needs. Our engineers are capable of working from existing designs or starting from scratch to develop truly specialized tools for industrial and commercial applications. Whatever the case, we'll work closely with you to determine the correct tools for your application.

SFS Carbide Tool Company Inc.

SFS Carbide Tool Co. © 2006

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