S.B. International, Inc.® is the Exclusive Marketer of J-LOY® Brand Valve Seat Inserts. All SBI® Cast J-LOY® Hardened Universal Valve Seat Inserts are Cast using a Premium High Carbon, High Chromium Iron Based Material with Excellent Corrosion and Wear Resistance with a typical hardness range of 35-45 on a Rockwell "C" Scale. All SBI Valve Seat Inserts are individually cast to ensure proper material transfer and formation. The Premium High Chromium material is designated for use in most Light to Medium Duty Automotive and Truck Applications for Both Intake and Exhaust Positions. This same Premium High Chromium material is also used in some Moderate to Heavy Duty Diesel Intake positions as well as Marine Intake positions.
"STAR SERIES" Super Premium Valve Seat Inserts
SBI offers a Super-Premium "Star Series" Nickel Based Non-Magnetic Valve Seat Insert which is designed specifically for exhaust positions for Passenger Cars, Light & Medium Duty Trucks as well as Stationary Engines operating in Extreme High Heat Conditions and/or using Gaseous Fuels such as CNG or LPG. Due to varying circumstances, these types of applications and/or operating conditions require a Valve Seat Insert material that offers Excellent Wear and Very High Hot Hardness Characteristics. The "Star Series" insert was developed to retain hardness beyond 1600° F to combat these high temperature conditions. As alternative fuels have become more commonly used, it became apparent cylinder heads were experiencing premature and severe exhaust valve seat erosion (recession). This erosion was noted on some High Chrome Valve Seat Inserts as well as other manufacturer's Nickel Based Material. The SBI "Star Series" Valve Seat Insert is made of a True Non-Magnetic Nickel Based Material which will retain it's Hardness Beyond 1600° F and can help to eliminate these common wear issues and provide a greater service life. Each Universal Star Series Valve Seat Insert part number that is available will utilize the same part number as the Premium High Carbon, High Chromium Valve Seat Insert part number with the addition of an "N" suffix. Refer to the Application listing or the progressive size listing in the catalog to see if there is an available "Star Series" Valve Seat Insert for your needs.
The SBI "Star Series" Material should be more than adequate to handle exhaust applications for Gasoline, CNG & LPG fuel. Many SBI customers have used and continue to use The Standard Premium Valve Seat Inserts for these engines and report no problems. We believe many failures may be caused by, but not limited to the following factors:
Powdered Metal Valve Seat Inserts
SBI offers an Optional Powdered Metal Valve Seat Insert in certain instances. As anyone who has machined factory inserts in late model heads already knows the technology for the production and use of Powdered Metal Valve Seat Inserts has been around for many years now. The challenge for the Valve Seat Insert manufacturer has always been to provide a consistent material with excellent wear characteristics combined with being easy to machine, the latter being a process the OEM does not require when building a new head. In fact after the engine has run for some time the OEM Valve Seat Insert will tend to work harden and become almost impossible to machine. SBI Powdered Metal Valve Seat Inserts are a Sintered Powdered Metal Carbon Steel and Tool Steel Matrix with Tungsten. The Superior Machinability is achieved by adding Proprietary Chemical Elements and Solid Dry Lubricants to the Composition which translates to Excellent Machinability and Wear Resistance. This material is primarily suited for gasoline applications. The material incorporates ease of machining, has consistent quality and takes advantage of the cost savings associated with this new technology. Each Universal Powdered Metal Valve Seat Insert part number that is available will utilize the same Premium High Carbon and High Chromium Valve Seat Insert part number with the addition of a "PM" suffix.
Heavy Duty Diesel Factory Installed Valve Seat Inserts
SBI Offers Direct OEM Replacement Valve Seat Inserts For Heavy Duty Diesel Engines such as Caterpillar, Cummins, Detroit Diesel, John Deere, Mack, Paccar and Volvo to name a few. In these instances, these Valve Seat Inserts are supplied using materials that either Meet or Exceed OEM Material Specifications for which they are applied. In Some instances Nickel "N" or Cobalt "C" based materials may apply and are indicated by their respective designated suffix. The Standard Size Valve Seat Inserts For Heavy Duty Applications are Exact OEM Duplicates of the OEM Service Part Dimensionally and in some cases an Oversized O.D. (+) Valve Seat Insert is availabe and are designed keeping in mind specific requirements of the Aftermarket. These OEM Replacement Valve Seat Inserts are indicated with an "E" in the part number for example just as SB2088E-1 where the part number is an Exact O.D. of 2.088". NOTE: See Part Number Explanations below for more info.
Metric Universal Valve Seat Inserts
SBI Offers a series of Metric Universal Valve Seat Inserts available in Premium High Carbon, High Chromium Iron Based Alloy. These are also offered in the Super Premium "Star Series" Nickel Based Alloy material indicated by an "N" suffix. These Metric Universal Valve Seat Inserts will also have an "E" in the part number indicating the base part number is the exact Imperial Outer Diameter. For example SB2087E-2 has a 53mm O.D., however is converted to the Exact Imperial dimension of 2.087". NOTE: See Part Number Explanations below for more info.
NOTE: The Following Information Provides Explanations For Part Number Scheme, Materials, Application Usage And Cutting Procedures
PART NUMBER EXPLANATION
Basic Part Number:
Understanding How To Choose A Range Of Premium Universal Inserts Or The Correct Insert For Your Needs Based On The Part Number
(Incl. Passenger Cars, Light & Medium Duty Trucks, Tractors, etc.)
Q: How do I know if an SBI Powder Metal Seat is available for my applications?
A: Look up your engine in the application section of the catalog. If a Powder Metal Seat is available, in the note column of the Valve Seat Insert section will indicate availability.
Q: Can I use an SBI Powder Metal Seat for Diesel or Propane Applications?
A: We do not recommend the use of SBI Powder Metal Seats for these applications. Use the seat recommended in the application section of the catalog.
Q: How do I machine SBI Powder Metal Seats?
A: Depending on type of machine, increasing spindle speeds by up to 50% should achieve desired results. On an SBI1562-1PM seat we recommend using about 350-400 RPM to achieve the best surface finish.
Q: What cutter life will I experience?
A: Testing has indicated from four to ten times as many seats before having to sharpen the cutter. It really depends on what is cut prior or after cutting the Powder Metal Seats.
Q: Are there any productivity gains?
A: The faster the cutting speeds and longer tool life will greatly increase machine output. The floor to floor time will be substantially improved and machine down time will decrease.
Q: What kind of surface finish can I expect?
A: Our Powder Metal Seat will provide one of the best finished seat surfaces of any seat available in the industry. Using a sharp cutter and the correct spindle speed, you can expect a consistent "mirror" finish on the cut surface.